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.
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.
2007
Gallardo-Vásquez, J. C.; de la Barrera, E.
Environmental and ontogenetic influences on growth, photosynthesis, and survival for young pitayo (Stenocereus queretaroensis) seedlings Journal Article
In: Journal of the Professional Association for Cactus Development, vol. 9, pp. 118-135, 2007.
Links | BibTeX | Tags: acclimation, agroecology, domestication, growth, nurse plants, photosynthesis, pitayo, reproductive ecophysiology, seed, seedling, shade, Stenocereus
@article{Gallardo-Vásquez2007,
title = {Environmental and ontogenetic influences on growth, photosynthesis, and survival for young pitayo (Stenocereus queretaroensis) seedlings},
author = {J. C. Gallardo-Vásquez and E. de la Barrera },
url = {http://www.jpacd.org/downloads/vol9/v9p118-135.pdf},
year = {2007},
date = {2007-04-04},
journal = {Journal of the Professional Association for Cactus Development},
volume = {9},
pages = {118-135},
keywords = {acclimation, agroecology, domestication, growth, nurse plants, photosynthesis, pitayo, reproductive ecophysiology, seed, seedling, shade, Stenocereus},
pubstate = {published},
tppubtype = {article}
}
de la Barrera, E.; Castellanos, A. E.
High temperature effects on gas exchange for the invasive buffel grass (Pennisetum ciliare [L.] Link) Journal Article
In: Weed Biology and Management, vol. 7, pp. 128-131, 2007.
Links | BibTeX | Tags: acclimation, buffel grass, Cenchrus, CO2, cultivation, forage, global change, invasive species, Pennisetum, photosynthesis, shade, Sonoran Desert, temperature, transpiration, water
@article{delaBarrera2007,
title = {High temperature effects on gas exchange for the invasive buffel grass (Pennisetum ciliare [L.] Link)},
author = {E. de la Barrera and A. E. Castellanos},
url = {http://agro.mx/wp-content/uploads/2016/06/014-De-la-Barrera-Castellanos-2007-WBM.pdf},
year = {2007},
date = {2007-01-01},
journal = {Weed Biology and Management},
volume = {7},
pages = {128-131},
keywords = {acclimation, buffel grass, Cenchrus, CO2, cultivation, forage, global change, invasive species, Pennisetum, photosynthesis, shade, Sonoran Desert, temperature, transpiration, water},
pubstate = {published},
tppubtype = {article}
}