acclimation agriculture biomonitors biophysics cactus CAM climate change CO2 drought ecophysiology epiphytes flower food security fruit germination global change Hylocereus invasive species nitrogen opuntia orchid photosynthesis pollution reproductive ecophysiology stable isotopes temperature Tillandsia tropical forest urban ecology water
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 Acta Physiologiae Plantarum, 41 (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. |
2018 |
Orozco-Martínez, R; de la Barrera, E Can germination requirements predict tolerance to extreme weather? — An assessment for heirloom maize from the P'urhépecha Plateau Journal Article International Journal of Agriculture and Biology, 20 (9), pp. 2039-2044, 2018. Abstract | Links | BibTeX | Tags: agriculture, cereal, climate change, domestication, drought, ecophysiology, food security, germination, maize @article{Orozco-Martínez2018, title = {Can germination requirements predict tolerance to extreme weather? — An assessment for heirloom maize from the P'urhépecha Plateau}, author = {R. Orozco-Martínez and E. de la Barrera }, url = {http://www.fspublishers.org/Issue.php?categoryID=158 http://agro.mx/wp-content/uploads/2018/07/045-OrozcoMtz-delaBarrera-maize-germination.pdf}, doi = {10.17957/IJAB/15.0727}, year = {2018}, date = {2018-07-27}, journal = {International Journal of Agriculture and Biology}, volume = {20}, number = {9}, pages = {2039-2044}, abstract = {The temperature and water potential requirements for seed germination were determined for five heirloom maizes from three different agroclimatological regions from the P'urhépecha community of San Francisco Pichátaro, Michoacán, Mexico. Germination experiments were conducted in environmental controlled chambers exposing seeds to day/night air temperatures (12 h photoperiod) of 15/5, 20/10, or 35/25ºC, and to water potentials of 0, –0.01, –0.05, –0.1, or –0.5 MPa, which were created with aqueous solutions of polyethylene glycol (molecular weight 20,000). Germination was maximal and occurred at a faster rate for seeds incubated at 35/25ºC. In turn, a high water potential of 0.0 or –0.01 MPa was necessary to achieve maximum germination, which decreased under more negative water potentials until germination was completely inhibited for seeds incubated under –0.5 MPa failed. Although an environmental specialization for germination was not observed among the heirloom maize evaluated, their ability to germinate maximally under high temperatures is indicative of their cultivation potential under the increasing air temperatures expected to occur during the present century. In contrast, germination sensitivity to relatively mild water potentials may be a conservative ecophysiological trait of drought-escape for this tropical annual plant.}, keywords = {agriculture, cereal, climate change, domestication, drought, ecophysiology, food security, germination, maize}, pubstate = {published}, tppubtype = {article} } The temperature and water potential requirements for seed germination were determined for five heirloom maizes from three different agroclimatological regions from the P'urhépecha community of San Francisco Pichátaro, Michoacán, Mexico. Germination experiments were conducted in environmental controlled chambers exposing seeds to day/night air temperatures (12 h photoperiod) of 15/5, 20/10, or 35/25ºC, and to water potentials of 0, –0.01, –0.05, –0.1, or –0.5 MPa, which were created with aqueous solutions of polyethylene glycol (molecular weight 20,000). Germination was maximal and occurred at a faster rate for seeds incubated at 35/25ºC. In turn, a high water potential of 0.0 or –0.01 MPa was necessary to achieve maximum germination, which decreased under more negative water potentials until germination was completely inhibited for seeds incubated under –0.5 MPa failed. Although an environmental specialization for germination was not observed among the heirloom maize evaluated, their ability to germinate maximally under high temperatures is indicative of their cultivation potential under the increasing air temperatures expected to occur during the present century. In contrast, germination sensitivity to relatively mild water potentials may be a conservative ecophysiological trait of drought-escape for this tropical annual plant. |
2017 |
Díaz-Álvarez, E A; de la Barrera, E PREPRINT: Mapping pollution in a megalopolis: the case for atmospheric biomonitors of nitrogen deposition Journal Article BioRxiv, doi: 10.1101/118257 , 2017, (This article is a preprint and has not been peer reviewed. ). Abstract | Links | BibTeX | Tags: biomonitoring, ecophysiology, global change, lichen, megacities, mosses, nitrogen, Tillandsia, urban ecology @article{Díaz-Álvarez2017b, title = {PREPRINT: Mapping pollution in a megalopolis: the case for atmospheric biomonitors of nitrogen deposition}, author = {E. A. Díaz-Álvarez and E. de la Barrera }, url = {https://doi.org/10.1101/118257 }, doi = {10.1101/118257}, year = {2017}, date = {2017-03-19}, journal = {BioRxiv}, volume = {doi: 10.1101/118257}, abstract = {An increase of nitrogen deposition resulting from human activities is not only a major threat for global biodiversity, but also for human health, especially in highly populated regions. It is thus important and in some instances legally mandated to monitor reactive nitrogen species in the atmosphere. However, deployment of automated networks can be excessively costly for most cities so the utilization of widely distributed biological species suitable for biomonitoring may be a good alternative. The aim of this work was thus to assess the suitability of different atmospheric organisms as biomonitors of nitrogen deposition, by means of an extensive sampling of a lichen, two mosses, and one bromeliad throughout the Valley of Mexico, the basin where the megalopolis of Mexico City (population 20 million) is located, and subsequent measurements of nitrogen metabolism parameters. In all cases significant responses of nitrogen content, C:N ratio and 15N were found for the lichen Anaptychia sp. the mosses Grimmia sp. and Fabronia sp., and the bromeliad Tillandsia recurvata in response to season and collected site. In turn, 15N for the mosses responded linearly to the wet deposition (R2= 0.7 for Grimmia sp. and R2=0.2 for Fabronia sp.). Also, the nitrogen content (R2=0.7), the C:N ratio (R2=0.6), and 15N (R2=0.5) for the bromeliad had a linear response to NOx. However, latter species was not found in sites with NOx concentrations above 212 ppm. These biomonitors can be utilized in tandem to determine the status of nitrogenous pollution in regions without monitoring networks.}, note = {This article is a preprint and has not been peer reviewed. }, keywords = {biomonitoring, ecophysiology, global change, lichen, megacities, mosses, nitrogen, Tillandsia, urban ecology}, pubstate = {published}, tppubtype = {article} } An increase of nitrogen deposition resulting from human activities is not only a major threat for global biodiversity, but also for human health, especially in highly populated regions. It is thus important and in some instances legally mandated to monitor reactive nitrogen species in the atmosphere. However, deployment of automated networks can be excessively costly for most cities so the utilization of widely distributed biological species suitable for biomonitoring may be a good alternative. The aim of this work was thus to assess the suitability of different atmospheric organisms as biomonitors of nitrogen deposition, by means of an extensive sampling of a lichen, two mosses, and one bromeliad throughout the Valley of Mexico, the basin where the megalopolis of Mexico City (population 20 million) is located, and subsequent measurements of nitrogen metabolism parameters. In all cases significant responses of nitrogen content, C:N ratio and 15N were found for the lichen Anaptychia sp. the mosses Grimmia sp. and Fabronia sp., and the bromeliad Tillandsia recurvata in response to season and collected site. In turn, 15N for the mosses responded linearly to the wet deposition (R2= 0.7 for Grimmia sp. and R2=0.2 for Fabronia sp.). Also, the nitrogen content (R2=0.7), the C:N ratio (R2=0.6), and 15N (R2=0.5) for the bromeliad had a linear response to NOx. However, latter species was not found in sites with NOx concentrations above 212 ppm. These biomonitors can be utilized in tandem to determine the status of nitrogenous pollution in regions without monitoring networks. |
2016 |
Díaz-Álvarez, E A ¿Qué tanto es tantito? Una breve historia del nitrógeno en la era industrial Online Morelia, UNAM Campus (Ed.): 2016. Links | BibTeX | Tags: ecophysiology, nitrogen, pollution, urban ecology @online{Díaz-Álvarez2016, title = {¿Qué tanto es tantito? Una breve historia del nitrógeno en la era industrial}, author = {E. A. Díaz-Álvarez}, editor = {UNAM Campus Morelia}, url = {http://agro.mx/wp-content/uploads/2017/08/diazalvarez-2016-BUM.pdf}, year = {2016}, date = {2016-12-31}, journal = {Boletín UNAM Morelia (BUM)}, volume = {64}, keywords = {ecophysiology, nitrogen, pollution, urban ecology}, pubstate = {published}, tppubtype = {online} } |
Villa-Reyes, F; de la Barrera, E Environmental cues for germination of the invasive bunch grass Pennisetum ciliare (L.) Link Journal Article Acta Physiologiae Plantarum, 38 , pp. 156, 2016. Abstract | Links | BibTeX | Tags: buffel grass, Cenchrus ciliaris, ecophysiology, germination, global change, invasive species, Pennisetum ciliare, zacate buffel @article{Villa-Reyes2016, title = {Environmental cues for germination of the invasive bunch grass Pennisetum ciliare (L.) Link}, author = {F. Villa-Reyes and E. de la Barrera}, url = {http://rdcu.be/noeu http://link.springer.com/article/10.1007/s11738-016-2175-x}, doi = {10.1007/s11738-016-2175-x}, year = {2016}, date = {2016-05-28}, journal = {Acta Physiologiae Plantarum}, volume = {38}, pages = {156}, abstract = {Responses of seed germination to air temperature, water potential, light, and smoke were studied in the laboratory for seeds of the invasive bunch grass Pennisetum ciliare (L.) Link (syn. Cenchrus ciliare L.; buffel grass). First introduced to North America during the mid-20th Century for establishing pastures, this African bunch grass has become an invasive species of concern. Across all the experiments conducted, a low germination was observed for P. ciliare fascicles that never exceeded 30% at 21 days after sowing. Optimal day/night air temperatures for germination, controlled with an environmental chamber, were 25/15 and 30/20 ºC, while extreme temperatures of 15/5 and 45/35 ºC inhibited germination. By sowing seeds of P. ciliare under different water potentials, created with aqueous solutions of polyethylene glycol, an optimum of -0.03 MPa led to the highest germination, while no germination was observed at -1.0 MPa. Monochromatic optical filters were utilized to germinate seeds under various wavelengths, of which red (650 nm) and far red (730 nm) led to the highest germination. In addition, seeds that were incubated in the dark had higher germination than those incubated under white light. Incubation in smoke water, which can stimulate germination of phyrophytic species, resulted in a marginal inhibition of germination compared with imbibition with distilled water.}, keywords = {buffel grass, Cenchrus ciliaris, ecophysiology, germination, global change, invasive species, Pennisetum ciliare, zacate buffel}, pubstate = {published}, tppubtype = {article} } Responses of seed germination to air temperature, water potential, light, and smoke were studied in the laboratory for seeds of the invasive bunch grass Pennisetum ciliare (L.) Link (syn. Cenchrus ciliare L.; buffel grass). First introduced to North America during the mid-20th Century for establishing pastures, this African bunch grass has become an invasive species of concern. Across all the experiments conducted, a low germination was observed for P. ciliare fascicles that never exceeded 30% at 21 days after sowing. Optimal day/night air temperatures for germination, controlled with an environmental chamber, were 25/15 and 30/20 ºC, while extreme temperatures of 15/5 and 45/35 ºC inhibited germination. By sowing seeds of P. ciliare under different water potentials, created with aqueous solutions of polyethylene glycol, an optimum of -0.03 MPa led to the highest germination, while no germination was observed at -1.0 MPa. Monochromatic optical filters were utilized to germinate seeds under various wavelengths, of which red (650 nm) and far red (730 nm) led to the highest germination. In addition, seeds that were incubated in the dark had higher germination than those incubated under white light. Incubation in smoke water, which can stimulate germination of phyrophytic species, resulted in a marginal inhibition of germination compared with imbibition with distilled water. |
2015 |
Guerrero-Jiménez, Z D; de la Barrera, E Short-term drought responses by seedlings of three maizes along an environmental gradient in Michoacán, Mexico Journal Article Maydica, 60 (2), pp. M017, 2015. Links | BibTeX | Tags: climate change, drought, ecophysiology, food security, maize @article{delaBarrera2015, title = {Short-term drought responses by seedlings of three maizes along an environmental gradient in Michoacán, Mexico}, author = {Z. D. Guerrero-Jiménez and E. de la Barrera}, url = {http://agro.mx/wp-content/uploads/2016/07/036-Guerrero-dlB-Maydica-html.pdf }, year = {2015}, date = {2015-12-17}, journal = {Maydica}, volume = {60}, number = {2}, pages = {M017}, keywords = {climate change, drought, ecophysiology, food security, maize}, 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. 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 = {https://books.google.com.mx/books?id=FOLucdeycDkC&lpg=PA393&ots=9pz9EVuNJz&dq=epilogue%20erick%20de%20la%20barrera%20perspectives%20biophysical%20ecophysiology&pg=PP1#v=onepage&q&f=false}, year = {2009}, date = {2009-01-01}, publisher = {Universidad Nacional Autónoma de México}, keywords = {biophysical, cactus, CAM, ecophysiology, festschrift, global change, temperature}, pubstate = {published}, tppubtype = {book} } |
de la Barrera, E; Smith, W K Epilogue Book Chapter de la Barrera, E; Smith, W K (Ed.): Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel, pp. 393-397, UNAM, 2009. Links | BibTeX | Tags: biophysics, ecophysiology, global change, public policy @inbook{delaBarrera2009b, title = {Epilogue}, author = {E. de la Barrera and W. K. Smith }, editor = {E. de la Barrera and W. K. Smith }, url = {https://books.google.com.mx/books?id=FOLucdeycDkC&lpg=PA393&ots=9pz9EVuNJz&dq=epilogue%20erick%20de%20la%20barrera%20perspectives%20biophysical%20ecophysiology&pg=PA393#v=onepage&q&f=false}, year = {2009}, date = {2009-01-01}, booktitle = {Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel}, pages = {393-397}, publisher = {UNAM}, keywords = {biophysics, ecophysiology, global change, public policy}, pubstate = {published}, tppubtype = {inbook} } |
2008 |
Álvarez-Añorve, M; Quesada, M; de la Barrera, E Plant functional groups: Physiology, ecology, and spectroscopy in tropical systems Book Chapter 2008. Links | BibTeX | Tags: atmosphere, biophysical, biophysics, ecophysiology, hyperspectral, leaf, optics, remote sensing, tropical forest @inbook{Álvarez-Añorve2008, title = {Plant functional groups: Physiology, ecology, and spectroscopy in tropical systems}, author = {M. Álvarez-Añorve and M. Quesada and E. de la Barrera }, url = {http://agro.mx/wp-content/uploads/2016/06/019-Alvarez-Añorve-et-al.-2008-Hyperspectral-Chapter.pdf}, year = {2008}, date = {2008-02-02}, keywords = {atmosphere, biophysical, biophysics, ecophysiology, hyperspectral, leaf, optics, remote sensing, tropical forest}, pubstate = {published}, tppubtype = {inbook} } |
2007 |
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 Boletín de la Sociedad Botánica de México, 81 , pp. 37-50, 2007. Links | BibTeX | Tags: agriculture, CAM, ecophysiology, environmental indicators, environmental productivity index, epiphytes, microenvironment, plasticity, stable isotopes @article{Andrade2007, 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}, year = {2007}, date = {2007-02-02}, journal = {Boletín de la Sociedad Botánica de México}, volume = {81}, pages = {37-50}, keywords = {agriculture, CAM, ecophysiology, environmental indicators, environmental productivity index, epiphytes, microenvironment, plasticity, stable isotopes}, pubstate = {published}, tppubtype = {article} } |
2005 |
de la Barrera, E; Andrade, J L Challenges to plant megadiversity: how environmental physiology can help Journal Article New Phytologist, 167 , pp. 5-8, 2005. Links | BibTeX | Tags: acclimation, agriculture, cactus, climate change, conservation, ecophysiology, legume, nitrogen, plant diversity, public policy, seed, stable isotopes, tropical forest @article{delaBarrera2005b, title = {Challenges to plant megadiversity: how environmental physiology can help}, author = {E. de la Barrera and J. L. Andrade}, url = {http://agro.mx/wp-content/uploads/2016/06/012-De-la-Barrera-Andrade-2005-New-Phytol.pdf}, year = {2005}, date = {2005-05-01}, journal = {New Phytologist}, volume = {167}, pages = {5-8}, keywords = {acclimation, agriculture, cactus, climate change, conservation, ecophysiology, legume, nitrogen, plant diversity, public policy, seed, stable isotopes, tropical forest}, pubstate = {published}, tppubtype = {article} } |
de la Barrera, E On the sesquicentennial of Fick's laws of diffusion Journal Article Nature Structural and Molecular Biology, 12 (4), pp. 280, 2005. Links | BibTeX | Tags: biophysics, diffussion, ecophysiology, Fick @article{delaBarrera2005, title = {On the sesquicentennial of Fick's laws of diffusion}, author = {E. de la Barrera}, url = {http://agro.mx/wp-content/uploads/2016/06/011-De-la-Barrera-2005-NSMB.pdf}, doi = {10.1038/nsmb0405-280}, year = {2005}, date = {2005-04-01}, journal = {Nature Structural and Molecular Biology}, volume = {12}, number = {4}, pages = {280}, keywords = {biophysics, diffussion, ecophysiology, Fick}, pubstate = {published}, tppubtype = {article} } |
2003 |
de la Barrera, E; Nobel, P S Physiological ecology of seed germination for the columnar cactus Stenocereus queretaroensis Journal Article Journal of Arid Environments, 53 , pp. 297-306, 2003. Links | BibTeX | Tags: acclimation, action spectrum, adaptation, cactus, columnar, ecophysiology, germination, phytochrome, seed, seed longevity, Stenocereus, temperature, water @article{delaBarrera2003, title = {Physiological ecology of seed germination for the columnar cactus Stenocereus queretaroensis}, author = {E. de la Barrera and P. S. Nobel }, url = {http://agro.mx/wp-content/uploads/2016/06/007-De-la-Barrera-Nobel-2003-J-Arid-Environ.pdf}, year = {2003}, date = {2003-02-01}, journal = {Journal of Arid Environments}, volume = {53}, pages = {297-306}, keywords = {acclimation, action spectrum, adaptation, cactus, columnar, ecophysiology, germination, phytochrome, seed, seed longevity, Stenocereus, temperature, water}, pubstate = {published}, tppubtype = {article} } |
2000 |
Nobel, P S; de la Barrera, E Carbon and water balances for young fruits of platyopuntias Journal Article Physiologia Plantarum, 109 (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}, keywords = {cactus, CAM, ecophysiology, fruit, opuntia, phloem}, pubstate = {published}, tppubtype = {article} } |