2021
González-Salvatierra, C.; Peña-Rodríguez, L. M.; Reyes-García, C.; de la Barrera, E.; Andrade, J. L.
Seasonal changes in photosynthesis for the epiphytic bromeliad Tillandsia brachycaulos in a tropical deciduous forest. Journal Article
In: Botanical Sciences, vol. 99, pp. 850-862, 2021.
Abstract | Links | BibTeX | Tags: CAM, chlorophyll, chlorophyll fluorescence, Crassulacean acid metabolism, ecophysiology, epiphytes, microenvironment, pigments, shade, tropical dry forest, water, water relations
@article{González-Salvatierra2021,
title = {Seasonal changes in photosynthesis for the epiphytic bromeliad Tillandsia brachycaulos in a tropical deciduous forest.},
author = {C. González-Salvatierra and L. M. Peña-Rodríguez and C. Reyes-García and E. de la Barrera and J. L. Andrade },
url = {https://botanicalsciences.com.mx/index.php/botanicalSciences/article/view/2842},
doi = {10.17129/botsci.2842},
year = {2021},
date = {2021-10-01},
journal = {Botanical Sciences},
volume = {99},
pages = {850-862},
abstract = {Background: Sunlight stress and drought affect plants by inducing various biochemical and physiological responses, which reduce growth. Seasonal changes in light and water availability that occur in forest canopies, where epiphytes occur, are extreme.
Questions: What are the seasonal changes in photosynthesis for an abundant epiphytic bromeliad in contrasting microenvironments? Is Crassulacean acid metabolism (CAM) an important feature of photoprotection for this epiphyte?
Studied species: Tillandsia brachycaulos Schltdl. (Bromeliaceae)
Study site and dates: Canopy of the tropical dry deciduous forest of Dzibilchaltún National Park, Yucatan, Mexico during the rainy season 2008 and dry season 2009.
Methods: Diurnal measurements of photosystem II efficiency, titratable acidity, leaf water potential, and photosynthetic pigment concentration were measured during the dry and rainy seasons in adult plants of T. brachycaulos in shaded and exposed microenvironments. The prevailing environmental conditions (photon flux density, precipitation, air temperature and relative humidity) were also seasonally characterized.
Results: The highest irradiance occurred during the dry season, caused photo-inactivation, a decrease of the quantum efficiency of photosystem II, and a reduction in CAM activity of about 40% in leaves of exposed plants of T. brachycaulos. During the rainy season, the leaf water potential of exposed and shaded plants of T. brachycaulos was lower at midday than at predawn, indicating water loss during the day.
Conclusions: Individuals of T. brachycaulos reduced CAM activity during the dry season; and, during the rainy season, increased carbon gain by stomata opening during phase II and IV of CAM.
},
keywords = {CAM, chlorophyll, chlorophyll fluorescence, Crassulacean acid metabolism, ecophysiology, epiphytes, microenvironment, pigments, shade, tropical dry forest, water, water relations},
pubstate = {published},
tppubtype = {article}
}
Background: Sunlight stress and drought affect plants by inducing various biochemical and physiological responses, which reduce growth. Seasonal changes in light and water availability that occur in forest canopies, where epiphytes occur, are extreme.
Questions: What are the seasonal changes in photosynthesis for an abundant epiphytic bromeliad in contrasting microenvironments? Is Crassulacean acid metabolism (CAM) an important feature of photoprotection for this epiphyte?
Studied species: Tillandsia brachycaulos Schltdl. (Bromeliaceae)
Study site and dates: Canopy of the tropical dry deciduous forest of Dzibilchaltún National Park, Yucatan, Mexico during the rainy season 2008 and dry season 2009.
Methods: Diurnal measurements of photosystem II efficiency, titratable acidity, leaf water potential, and photosynthetic pigment concentration were measured during the dry and rainy seasons in adult plants of T. brachycaulos in shaded and exposed microenvironments. The prevailing environmental conditions (photon flux density, precipitation, air temperature and relative humidity) were also seasonally characterized.
Results: The highest irradiance occurred during the dry season, caused photo-inactivation, a decrease of the quantum efficiency of photosystem II, and a reduction in CAM activity of about 40% in leaves of exposed plants of T. brachycaulos. During the rainy season, the leaf water potential of exposed and shaded plants of T. brachycaulos was lower at midday than at predawn, indicating water loss during the day.
Conclusions: Individuals of T. brachycaulos reduced CAM activity during the dry season; and, during the rainy season, increased carbon gain by stomata opening during phase II and IV of CAM.
Questions: What are the seasonal changes in photosynthesis for an abundant epiphytic bromeliad in contrasting microenvironments? Is Crassulacean acid metabolism (CAM) an important feature of photoprotection for this epiphyte?
Studied species: Tillandsia brachycaulos Schltdl. (Bromeliaceae)
Study site and dates: Canopy of the tropical dry deciduous forest of Dzibilchaltún National Park, Yucatan, Mexico during the rainy season 2008 and dry season 2009.
Methods: Diurnal measurements of photosystem II efficiency, titratable acidity, leaf water potential, and photosynthetic pigment concentration were measured during the dry and rainy seasons in adult plants of T. brachycaulos in shaded and exposed microenvironments. The prevailing environmental conditions (photon flux density, precipitation, air temperature and relative humidity) were also seasonally characterized.
Results: The highest irradiance occurred during the dry season, caused photo-inactivation, a decrease of the quantum efficiency of photosystem II, and a reduction in CAM activity of about 40% in leaves of exposed plants of T. brachycaulos. During the rainy season, the leaf water potential of exposed and shaded plants of T. brachycaulos was lower at midday than at predawn, indicating water loss during the day.
Conclusions: Individuals of T. brachycaulos reduced CAM activity during the dry season; and, during the rainy season, increased carbon gain by stomata opening during phase II and IV of CAM.
2020
Rosado-Calderón, A. T.; Tamayo-Chim, M.; de la Barrera, E.; Ramírez-Morillo, I. M.; Andrade, J. L.; Briones, O.; Reyes-García, C.
High resilience to extreme climatic changes in the CAM epiphyte Tillandsia utriculata L. (Bromeliaceae) Journal Article
In: Physiologia Plantarum, vol. 168, pp. 547-562, 2020.
Abstract | Links | BibTeX | Tags: CAM, climate change, drought, epiphytes, reaction norms, Tillandsia
@article{Rosado-Calderón2018,
title = {High resilience to extreme climatic changes in the CAM epiphyte Tillandsia utriculata L. (Bromeliaceae)},
author = {A.T. Rosado-Calderón and M. Tamayo-Chim and E. de la Barrera and I.M. Ramírez-Morillo and J. L. Andrade and O. Briones and C. Reyes-García },
doi = {10.1111/ppl.12805},
year = {2020},
date = {2020-02-27},
journal = {Physiologia Plantarum},
volume = {168},
pages = {547-562},
abstract = {Climate change is expected to increase the frequency of extreme climatic events, yet few studies have addressed the capacity of plant species to deal with such events. Species that are widespread are predicted to be highly plastic and able to acclimate to highly changing conditions. To study the plasticity in physiological responses of the widely distributed epiphyte Tillandsia utriculata, we transplanted individuals from a coastal scrub and broadleaf evergreen forest to a similar coastal scrub site and forest. After a 45‐day acclimation, the plants were moved to a semicontrolled greenhouse at each site, and then subjected to a 20‐day drought. Physiological variables were measured during the acclimation and the drought. The individuals of scrub and forest populations had similar relative water content and carbon assimilation in the contrasting conditions of the two transplantation sites despite the high discrepancy between the environments at their original site. Electron transport rates were higher in individuals from the scrub population. Electron transport rates were also higher than estimated from carbon assimilation, suggesting that photorespiration was present. The individuals of the coastal scrub population had a higher capacity to dissipate excess energy this way. The relative distance index of plasticity was high overall, indicating that some traits are highly plastic (titratable acidity, carbon assimilation) in order to maintain the stability of others (maximum quantum yield Fv/Fm and relative water content). We conclude that T. utriculata is a highly plastic species with a high capacity to tolerate extreme environmental changes over a short time.},
keywords = {CAM, climate change, drought, epiphytes, reaction norms, Tillandsia},
pubstate = {published},
tppubtype = {article}
}
Climate change is expected to increase the frequency of extreme climatic events, yet few studies have addressed the capacity of plant species to deal with such events. Species that are widespread are predicted to be highly plastic and able to acclimate to highly changing conditions. To study the plasticity in physiological responses of the widely distributed epiphyte Tillandsia utriculata, we transplanted individuals from a coastal scrub and broadleaf evergreen forest to a similar coastal scrub site and forest. After a 45‐day acclimation, the plants were moved to a semicontrolled greenhouse at each site, and then subjected to a 20‐day drought. Physiological variables were measured during the acclimation and the drought. The individuals of scrub and forest populations had similar relative water content and carbon assimilation in the contrasting conditions of the two transplantation sites despite the high discrepancy between the environments at their original site. Electron transport rates were higher in individuals from the scrub population. Electron transport rates were also higher than estimated from carbon assimilation, suggesting that photorespiration was present. The individuals of the coastal scrub population had a higher capacity to dissipate excess energy this way. The relative distance index of plasticity was high overall, indicating that some traits are highly plastic (titratable acidity, carbon assimilation) in order to maintain the stability of others (maximum quantum yield Fv/Fm and relative water content). We conclude that T. utriculata is a highly plastic species with a high capacity to tolerate extreme environmental changes over a short time.
Díaz-Álvarez, E. A.; de la Barrera, E.; Barrios-Hernández, E. Y.; Arróniz-Crespo, M.
Morphophysiological screening of potential organisms for biomonitoring nitrogen deposition Journal Article
In: Ecological Indicators, vol. 108, pp. 105729, 2020, ISSN: 1470-160X.
Abstract | Links | BibTeX | Tags: atmospheric pollution, CAM, global change, Latin America, Mexico, neotropical, nitrogen
@article{Díaz-Álvarez2020,
title = {Morphophysiological screening of potential organisms for biomonitoring nitrogen deposition},
author = {E. A. Díaz-Álvarez and E. de la Barrera and E. Y. Barrios-Hernández and M. Arróniz-Crespo},
url = {https://www.sciencedirect.com/science/article/pii/S1470160X19307228},
doi = {10.1016/j.ecolind.2019.105729},
issn = {1470-160X},
year = {2020},
date = {2020-01-06},
journal = {Ecological Indicators},
volume = {108},
pages = {105729},
abstract = {The intensification of different anthropic activities has led to a doubling of the emitted reactive nitrogen species since the second half of the XX century, resulting in the increase of nitrogen deposition. This poses a major threat to global biodiversity. However, in developing countries the monitoring of atmospheric deposition has shown to be difficult. For these reasons, the aim of this study was to assess, by means of a greenhouse dose-response experiment, the biomonitoring potential of two mosses, Braunia secunda and Thuidium delicatulum, and two epiphytic bromeliads, Tillandsia recurvata and Tillandsia usneoides, which are widely distributed in Latin America. A significant increase of the phosphomonoesterase activity was observed for the mosses, particularly under a High-nitrogen treatment, a parameter that decreased for the bromeliads. In turn, the nitrate reductase activity decreased over the course of the experiment for the mosses, but it remained almost unchanged for both tillandsias. While the nitrogen content for the mosses increased, it fluctuated for the bromeliads. Braunia secunda became greener under the Low-nitrogen than under the other treatments, while the coloration for T. delicatulum turned to brown under all treatments. The tillandsias remained visually unchanged under all treatments. The mosses had a clear response to the simulated nitrogen deposition, with B. secunda being more tolerant than T. delicatulum. Neither tillandsia presented a clear response to the treatments. Thus, the moss B. secunda is a very suitable species for biomonitoring nitrogen deposition, while the other species evaluated were deemed unsuitable.},
keywords = {atmospheric pollution, CAM, global change, Latin America, Mexico, neotropical, nitrogen},
pubstate = {published},
tppubtype = {article}
}
The intensification of different anthropic activities has led to a doubling of the emitted reactive nitrogen species since the second half of the XX century, resulting in the increase of nitrogen deposition. This poses a major threat to global biodiversity. However, in developing countries the monitoring of atmospheric deposition has shown to be difficult. For these reasons, the aim of this study was to assess, by means of a greenhouse dose-response experiment, the biomonitoring potential of two mosses, Braunia secunda and Thuidium delicatulum, and two epiphytic bromeliads, Tillandsia recurvata and Tillandsia usneoides, which are widely distributed in Latin America. A significant increase of the phosphomonoesterase activity was observed for the mosses, particularly under a High-nitrogen treatment, a parameter that decreased for the bromeliads. In turn, the nitrate reductase activity decreased over the course of the experiment for the mosses, but it remained almost unchanged for both tillandsias. While the nitrogen content for the mosses increased, it fluctuated for the bromeliads. Braunia secunda became greener under the Low-nitrogen than under the other treatments, while the coloration for T. delicatulum turned to brown under all treatments. The tillandsias remained visually unchanged under all treatments. The mosses had a clear response to the simulated nitrogen deposition, with B. secunda being more tolerant than T. delicatulum. Neither tillandsia presented a clear response to the treatments. Thus, the moss B. secunda is a very suitable species for biomonitoring nitrogen deposition, while the other species evaluated were deemed unsuitable.
2019
Díaz-Álvarez, E. A.; Felix, J. D.; de la Barrera, E.
Elemental and isotopic assessment for Colombian orchids from a montane cloud forest: a baseline for global environmental change Journal Article
In: Acta Physiologiae Plantarum, vol. 41, no. 6, pp. 99, 2019.
Abstract | Links | BibTeX | Tags: biodiversity, CAM, ecophysiology, epiphytes, global change, nitrogen, orchid, photosynthesis, stable isotopes
@article{Díaz-Álvarez2019,
title = {Elemental and isotopic assessment for Colombian orchids from a montane cloud forest: a baseline for global environmental change},
author = {E. A. Díaz-Álvarez and J. D. Felix and E. de la Barrera},
url = {https://rdcu.be/bCRG6},
doi = {10.1007/s11738-019-2893-y},
year = {2019},
date = {2019-05-16},
journal = {Acta Physiologiae Plantarum},
volume = {41},
number = {6},
pages = {99},
abstract = {Orchidaceae is the largest family of plants, reaching its maximum diversity in Colombia where 4000 species have been registered. One particular ecosystem with high diversity of orchids is the tropical montane cloud forest characterized by high humidity and low air temperatures. However, due to anthropic pressure such as land use change its area has been reduced. This is not the only anthropic disturbance that can affect the continuity of this forest and orchids, climate change and nitrogen deposition also become threats. By means of elemental composition and isotopic measurements of carbon and nitrogen, we determined the photosynthetic pathway for orchids from a tropical cloud forest in Colombia, for which, we also evaluated the nutritional status of nitrogen and its relationship with atmospheric deposition. We found 46 species from 18 genera; of these, 19 species were epiphytic, 9 lithophytic and 18 terrestrials. The carbon content was not significantly different among the species evaluated, averaging 46.4 ± 0.41% (dry weight). In turn, only one terrestrial orchid had a nitrogen content above 2.2%, averaged 1.4 ± 0.07% for the remaining 45 species. The δ13C that averaged − 28.1 ± 0.4‰ for 45 species was typical of C3 plants, while only one species, whose δ13C of 18.8‰ can be considered CAM. The δ15N values for 44 orchids were negative, in total they ranged from − 8.1 to 4.5‰. It can be concluded that the temperatures in this area are not yet high enough to produce a noticeable change in photosynthesis as evidenced by the carbon content of orchids, however, the expected rise would bring harmful consequences for these populations of orchids, especially when considering that these orchids were collected at the highest altitudinal range of the region. Moreover, the rates of nitrogen deposition are not high enough yet to leave a significant signal in the vegetation.},
keywords = {biodiversity, CAM, ecophysiology, epiphytes, global change, nitrogen, orchid, photosynthesis, stable isotopes},
pubstate = {published},
tppubtype = {article}
}
Orchidaceae is the largest family of plants, reaching its maximum diversity in Colombia where 4000 species have been registered. One particular ecosystem with high diversity of orchids is the tropical montane cloud forest characterized by high humidity and low air temperatures. However, due to anthropic pressure such as land use change its area has been reduced. This is not the only anthropic disturbance that can affect the continuity of this forest and orchids, climate change and nitrogen deposition also become threats. By means of elemental composition and isotopic measurements of carbon and nitrogen, we determined the photosynthetic pathway for orchids from a tropical cloud forest in Colombia, for which, we also evaluated the nutritional status of nitrogen and its relationship with atmospheric deposition. We found 46 species from 18 genera; of these, 19 species were epiphytic, 9 lithophytic and 18 terrestrials. The carbon content was not significantly different among the species evaluated, averaging 46.4 ± 0.41% (dry weight). In turn, only one terrestrial orchid had a nitrogen content above 2.2%, averaged 1.4 ± 0.07% for the remaining 45 species. The δ13C that averaged − 28.1 ± 0.4‰ for 45 species was typical of C3 plants, while only one species, whose δ13C of 18.8‰ can be considered CAM. The δ15N values for 44 orchids were negative, in total they ranged from − 8.1 to 4.5‰. It can be concluded that the temperatures in this area are not yet high enough to produce a noticeable change in photosynthesis as evidenced by the carbon content of orchids, however, the expected rise would bring harmful consequences for these populations of orchids, especially when considering that these orchids were collected at the highest altitudinal range of the region. Moreover, the rates of nitrogen deposition are not high enough yet to leave a significant signal in the vegetation.
2017
Díaz-Álvarez, E. A.; Rojas-Cortés, A. P.; de la Barrera, E.
Acumulación nocturna de acidez titulable por Tillandsia makoyana (Bromeliaceae), epífita de la selva baja caducifolia Journal Article
In: Phyton – International Journal of Experimental Botany, vol. 86, pp. 278-281, 2017.
Abstract | Links | BibTeX | Tags: CAM, Chamela, epiphyte, Jova, shade, Tillandsia, water relations
@article{Díaz-Álvarez2017,
title = {Acumulación nocturna de acidez titulable por Tillandsia makoyana (Bromeliaceae), epífita de la selva baja caducifolia},
author = {E. A. Díaz-Álvarez and A. P. Rojas-Cortés and E. de la Barrera},
url = {http://agro.mx/wp-content/uploads/2017/12/043-Diaz_Alvarez-2017-Phyton.pdf
http://www.revistaphyton.fund-romuloraggio.org.ar/vol86.html},
year = {2017},
date = {2017-12-20},
journal = {Phyton – International Journal of Experimental Botany},
volume = {86},
pages = {278-281},
abstract = {The epiphytic bromeliad \textit{Tillandsia makoyana} was studied to assess the contribution of the environmental factors, water, temperature, and light, to the expression of the Crassulacean acid metabolism. In particular, nocturnal titratable acidity accumulation and maximum leaf temperature were measured in response to watering and incident light. Plants that were watered and exposed to direct sunlight had the highest nocturnal accumulation of titratable acidity of 25.52 ± 0.34 H+/m^2, while the plants without irrigation and kept in the shade had a 59% reduction in their titratable acidity. Our results illustrate a rapid response of the photosynthetic activity to water availability for \textit{Tillandsia makoyana}, native from an ecosystem where this environmental factor greatly fluctuates.},
keywords = {CAM, Chamela, epiphyte, Jova, shade, Tillandsia, water relations},
pubstate = {published},
tppubtype = {article}
}
The epiphytic bromeliad Tillandsia makoyana was studied to assess the contribution of the environmental factors, water, temperature, and light, to the expression of the Crassulacean acid metabolism. In particular, nocturnal titratable acidity accumulation and maximum leaf temperature were measured in response to watering and incident light. Plants that were watered and exposed to direct sunlight had the highest nocturnal accumulation of titratable acidity of 25.52 ± 0.34 H+/m^2, while the plants without irrigation and kept in the shade had a 59% reduction in their titratable acidity. Our results illustrate a rapid response of the photosynthetic activity to water availability for Tillandsia makoyana, native from an ecosystem where this environmental factor greatly fluctuates.
2015
Díaz-Álvarez, E. A.; Torres-Galeano, C.; Rojas-Cortés, A. P.; de la Barrera, E.
In vitro germination and development of two endangered endemic Colombian orchids Cattleya mendelii and Cattleya quadricolor Journal Article
In: Gayana Botánica, vol. 72, pp. 213-220, 2015.
Links | BibTeX | Tags: auxin, biotechnology, CAM, Cattleya, culture media, development, gibberellin, orchid, phytohormones
@article{Díaz-Álvarez2015,
title = {In vitro germination and development of two endangered endemic Colombian orchids Cattleya mendelii and Cattleya quadricolor},
author = {E. A. Díaz-Álvarez and C. Torres-Galeano and A. P. Rojas-Cortés and E. de la Barrera },
url = {http://www.gayanabotanica.cl/pdfs/2015/2/05_Diaz-Alvarez_etal_2015.pdf},
year = {2015},
date = {2015-11-26},
journal = {Gayana Botánica},
volume = {72},
pages = {213-220},
keywords = {auxin, biotechnology, CAM, Cattleya, culture media, development, gibberellin, orchid, phytohormones},
pubstate = {published},
tppubtype = {article}
}
Díaz-Álvarez, E. A.; Lindig-Cisneros, R.; de la Barrera, E.
Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa Journal Article
In: PeerJ, vol. 3, pp. e1021, 2015.
Abstract | Links | BibTeX | Tags: acid rain, biodiversity, CAM, conservation physiology, d15N, global change, Laelia, neotropical, nitrogen, orchid, plant nutrition, pollution, stable isotopes
@article{Díaz-Álvarez2015,
title = {Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa},
author = {E. A. Díaz-Álvarez and R. Lindig-Cisneros and E. de la Barrera},
url = {https://peerj.com/articles/1021/
http://agro.mx/wp-content/uploads/2015/06/031-Díaz-Alvarez-et-al-2015-PeerJ-Laelia.pdf},
doi = {10.7717/peerj.1021},
year = {2015},
date = {2015-06-18},
journal = {PeerJ},
volume = {3},
pages = {e1021},
abstract = {Potential ecophysiological responses to nitrogen deposition, which is considered to be one of the leading causes for global biodiversity loss, were studied for the endangered endemic Mexican epiphytic orchid, Laelia speciosa, via a shadehouse dose-response experiment (doses were 2.5, 5, 10, 20, 40, and 80 kg N ha-1 yr-1) in order to assess the potential risk facing this orchid given impending scenarios of nitrogen deposition. Lower doses of nitrogen of up to 20 kg N ha yr–1, the dose that led to optimal plant performance, acted as fertilizer. For instance, the production of leaves and pseudobulbs were respectively 35% and 36% greater for plants receiving 20 kg N ha yr–1 than under any other dose. Also, the chlorophyll content and quantum yield peaked at 0.66 ± 0.03 g m-2 and 0.85 ± 0.01, respectively, for plants growing under the optimum dose. In contrast, toxic effects were observed at the higher doses of 40 and 80 kg N ha yr–1. The δ13C for leaves averaged –14.7 ± 0.2‰ regardless of the nitrogen dose. In turn, δ15N decreased as the nitrogen dose increased from 0.9 ±0.1‰ under 2.5 kg N ha-1 yr-1 to – 3.1 ± 0.2 ‰ under 80 kg N ha-1 yr-1, indicating that orchids preferentially assimilate NH4+ rather than NO3– of the solution under higher doses of nitrogen. Laelia speciosa showed a clear response to inputs of nitrogen, thus, increasing rates of atmospheric nitrogen deposition can pose an important threat for this species.},
keywords = {acid rain, biodiversity, CAM, conservation physiology, d15N, global change, Laelia, neotropical, nitrogen, orchid, plant nutrition, pollution, stable isotopes},
pubstate = {published},
tppubtype = {article}
}
Potential ecophysiological responses to nitrogen deposition, which is considered to be one of the leading causes for global biodiversity loss, were studied for the endangered endemic Mexican epiphytic orchid, Laelia speciosa, via a shadehouse dose-response experiment (doses were 2.5, 5, 10, 20, 40, and 80 kg N ha-1 yr-1) in order to assess the potential risk facing this orchid given impending scenarios of nitrogen deposition. Lower doses of nitrogen of up to 20 kg N ha yr–1, the dose that led to optimal plant performance, acted as fertilizer. For instance, the production of leaves and pseudobulbs were respectively 35% and 36% greater for plants receiving 20 kg N ha yr–1 than under any other dose. Also, the chlorophyll content and quantum yield peaked at 0.66 ± 0.03 g m-2 and 0.85 ± 0.01, respectively, for plants growing under the optimum dose. In contrast, toxic effects were observed at the higher doses of 40 and 80 kg N ha yr–1. The δ13C for leaves averaged –14.7 ± 0.2‰ regardless of the nitrogen dose. In turn, δ15N decreased as the nitrogen dose increased from 0.9 ±0.1‰ under 2.5 kg N ha-1 yr-1 to – 3.1 ± 0.2 ‰ under 80 kg N ha-1 yr-1, indicating that orchids preferentially assimilate NH4+ rather than NO3– of the solution under higher doses of nitrogen. Laelia speciosa showed a clear response to inputs of nitrogen, thus, increasing rates of atmospheric nitrogen deposition can pose an important threat for this species.
2014
Díaz-Álvarez, E. A.; Lindig-Cisneros, R.; Reyes-García, C.; de la Barrera, E.
PREPRINT: Effects of simulated nitrogen deposition and a stable isotopic assessment for the neotropical epiphytic orchid Laelia speciosa Journal Article
In: PeerJ Preprints, vol. 2, pp. e771v1, 2014, ( NOT PEER-REVIEWED. This is a rapid communication before peer review.).
Links | BibTeX | Tags: CAM, epiphyte, global change, nitrogen, orchid, preprint
@article{Díaz-Álvarez2014,
title = {PREPRINT: Effects of simulated nitrogen deposition and a stable isotopic assessment for the neotropical epiphytic orchid Laelia speciosa},
author = {E. A. Díaz-Álvarez and R. Lindig-Cisneros and C. Reyes-García and E. de la Barrera},
url = {https://peerj.com/preprints/771/},
doi = {10.7287/peerj.preprints.771v1},
year = {2014},
date = {2014-12-31},
journal = {PeerJ Preprints},
volume = {2},
pages = {e771v1},
note = { NOT PEER-REVIEWED. This is a rapid communication before peer review.},
keywords = {CAM, epiphyte, global change, nitrogen, orchid, preprint},
pubstate = {published},
tppubtype = {article}
}
2009
de la Barrera, E.; Smith, W. K. (Ed.)
Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel Book
Universidad Nacional Autónoma de México, 2009.
Abstract | Links | BibTeX | Tags: biophysical, cactus, CAM, ecophysiology, festschrift, global change, temperature
@book{delaBarrera2009,
title = {Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel},
editor = {E. de la Barrera and W. K. Smith},
url = {http://www.librosoa.unam.mx/handle/123456789/2012},
year = {2009},
date = {2009-01-01},
publisher = {Universidad Nacional Autónoma de México},
abstract = {Park S. Nobel (Distinguished Professor Emeritus, University of California, Los Angeles) pioneered the coupling of cellular physical chemistry with plant physiology, providing a sound physicochemical interpretation of the laws of diffusion to a rapidly expanding field of plant physiological ecology. For the first time, the commonly applied Fick's and Ohm's Laws could be explained on a thermodynamic basis with exceptional clarity and a strong analytical approach. His classical textbook is the only one of its kind to provide an extensive array of quantitative problems and solutions in the field of plant biophysics and ecophysiology, extending from the molecular to the ecological level. Accompanying Park's production of such a prestigious textbook are an extraordinary number of refereed publications and four other books on desert plant ecophysiology. In this festschrift, former graduate students and postdocs, as well as colleagues of Prof. Nobel present a series of reviews that include scales from sub-cellular to global, and topics that range from desert succulent biology to the physiology of alpine plants, encompassing basic research and applications in agronomy and conservation biology. This state-of-the-field survey provides current and useful information for professionals and graduate students searching for research topics, while illustrating the broad span of the influence that Nobel's career has had on modern ecophysiology.},
keywords = {biophysical, cactus, CAM, ecophysiology, festschrift, global change, temperature},
pubstate = {published},
tppubtype = {book}
}
Park S. Nobel (Distinguished Professor Emeritus, University of California, Los Angeles) pioneered the coupling of cellular physical chemistry with plant physiology, providing a sound physicochemical interpretation of the laws of diffusion to a rapidly expanding field of plant physiological ecology. For the first time, the commonly applied Fick's and Ohm's Laws could be explained on a thermodynamic basis with exceptional clarity and a strong analytical approach. His classical textbook is the only one of its kind to provide an extensive array of quantitative problems and solutions in the field of plant biophysics and ecophysiology, extending from the molecular to the ecological level. Accompanying Park's production of such a prestigious textbook are an extraordinary number of refereed publications and four other books on desert plant ecophysiology. In this festschrift, former graduate students and postdocs, as well as colleagues of Prof. Nobel present a series of reviews that include scales from sub-cellular to global, and topics that range from desert succulent biology to the physiology of alpine plants, encompassing basic research and applications in agronomy and conservation biology. This state-of-the-field survey provides current and useful information for professionals and graduate students searching for research topics, while illustrating the broad span of the influence that Nobel's career has had on modern ecophysiology.
2007
de la Barrera, E.; Andrade, J. L.
Diversidad fisiológica de las plantas mexicanas: el caso de un metabolismo fotosintético especial Journal Article
In: Boletín de la Sociedad Botánica de México, vol. 81, pp. 157-159, 2007.
Links | BibTeX | Tags: Agave, agriculture, bromeliad, cactus, CAM, epiphytes, prickly pear
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title = {Diversidad fisiológica de las plantas mexicanas: el caso de un metabolismo fotosintético especial},
author = {E. de la Barrera and J. L. Andrade},
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year = {2007},
date = {2007-03-03},
journal = {Boletín de la Sociedad Botánica de México},
volume = {81},
pages = {157-159},
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Andrade, J. L.; de la Barrera, E.; Reyes-García, C.; Ricalde, M. F.; Vargas-Soto, G.; Cervera, J. C.
El metabolismo ácido de las crasuláceas: diversidad, fisiología ambiental, y productividad Journal Article
In: Boletín de la Sociedad Botánica de México, vol. 81, pp. 37-50, 2007.
Links | BibTeX | Tags: agriculture, CAM, ecophysiology, environmental indicators, environmental productivity index, epiphytes, microenvironment, plasticity, stable isotopes
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title = {El metabolismo ácido de las crasuláceas: diversidad, fisiología ambiental, y productividad},
author = {J. L. Andrade and E. de la Barrera and C. Reyes-García and M. F. Ricalde and G. Vargas-Soto and J. C. Cervera},
url = {http://www.ibiologia.unam.mx/sociedad/www/pdf/BSBM%2082/Boletines%20publicados/Numero%2081/Sobretiro%20PWD%20BSBM81/Andrade%20et%20al%202007%20%28BSBM81%2037-50%29.pdf},
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2004
de la Barrera, E.; Nobel, P. S.
Carbon and water relations for developing fruits of Opuntia ficus-indica (L.) Miller, including effects of drought and gibberellic acid Journal Article
In: Journal of Experimental Botany, vol. 55, no. 397, pp. 719-729, 2004.
Links | BibTeX | Tags: abscisic acid, cactus, CAM, carbon, drought, fruit, gibberellic acid, opuntia, photosynthesis, water
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title = {Carbon and water relations for developing fruits of Opuntia ficus-indica (L.) Miller, including effects of drought and gibberellic acid},
author = {E. de la Barrera and P. S. Nobel },
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year = {2004},
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2002
Nobel, P. S.; de la Barrera, E.; Beilman, D. W.; Doherty, J. H.; Zutta, B. R.
Temperature limitations for cultivation of edible cacti in California Journal Article
In: Madroño, vol. 49, no. 4, pp. 228-236, 2002.
Links | BibTeX | Tags: agriculture, cactus, CAM, CO2, cultivation, fruit, Hylocereus, opuntia, temperature
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title = {Temperature limitations for cultivation of edible cacti in California},
author = {P. S. Nobel and E. de la Barrera and D. W. Beilman and J. H. Doherty and B. R. Zutta},
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Nobel, P. S.; de la Barrera, E.
Nitrogen relations for net CO2 uptake by the cultivated hemiepiphytic cactus, Hylocereus undatus Journal Article
In: Scientia Horticulturae, vol. 96, pp. 281-292, 2002.
Links | BibTeX | Tags: cactus, CAM, chlorophyll, CO2, Hoagland solution, Hylocereus, nitrogen, nutrition, pitahaya
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title = {Nitrogen relations for net CO2 uptake by the cultivated hemiepiphytic cactus, Hylocereus undatus},
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Nobel, P. S.; de la Barrera, E.
Stem water relations and net CO2 uptake for a hemiepiphytic cactus during short-trm drought Journal Article
In: Environmental and Experimental Botany, vol. 48, pp. 129-137, 2002.
Links | BibTeX | Tags: abscisic acid, cactus, CAM, CO2, drought, Hylocereus, root, water
@article{Nobel2002b,
title = {Stem water relations and net CO2 uptake for a hemiepiphytic cactus during short-trm drought},
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Nobel, P. S.; de la Barrera, E.
High temperature and net CO2 uptake, growth, and stem damage for the hemiepiphytic cactus Hylocereus undatus Journal Article
In: Biotropica, vol. 34, no. 2, pp. 225-231, 2002.
Links | BibTeX | Tags: acclimation, cactus, CAM, desert, fruit, Hylocereus, necrosis, neutral red, pitahaya, root, temperature, tropical forest
@article{Nobel2002,
title = {High temperature and net CO2 uptake, growth, and stem damage for the hemiepiphytic cactus Hylocereus undatus},
author = {P. S. Nobel and E. de la Barrera},
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2000
Nobel, P. S.; de la Barrera, E.
Carbon and water balances for young fruits of platyopuntias Journal Article
In: Physiologia Plantarum, vol. 109, no. 2, pp. 160-166, 2000.
Links | BibTeX | Tags: cactus, CAM, ecophysiology, fruit, opuntia, phloem
@article{Nobel2000,
title = {Carbon and water balances for young fruits of platyopuntias},
author = {P. S. Nobel and E. de la Barrera},
url = {http://agro.mx/wp-content/uploads/2016/06/001-Nobel-De-la-Barrera-2000-Physiol-Plant.pdf},
year = {2000},
date = {2000-02-01},
journal = {Physiologia Plantarum},
volume = {109},
number = {2},
pages = {160-166},
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pubstate = {published},
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