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.
2011
Gudiño, W.; Casas, A.; Valiente-Banuet, A.; Orozco-Martínez, R.; de la Barrera, E.
In: Journal of the Professional Association for Cactus Development, vol. 13, pp. 88-101, 2011.
Links | BibTeX | Tags: anthesis, cactus, climate, climate change, drought, energy balance, light, microenvironment, nectar flower, photosynthesis, Polaskia, Tehuacán, temperature
@article{Gudiño2011,
title = {Climate and microenvironmental parameters affecting anthesis and nectar secretion for Polaskia chende and P. chichipe, endemic columnar cacti from the Tehuacán Valley, Puebla},
author = {W. Gudiño and A. Casas and A. Valiente-Banuet and R. Orozco-Martínez and E. de la Barrera},
url = {http://www.jpacd.org/?modulo=JS&ID=14},
year = {2011},
date = {2011-02-02},
journal = {Journal of the Professional Association for Cactus Development},
volume = {13},
pages = {88-101},
keywords = {anthesis, cactus, climate, climate change, drought, energy balance, light, microenvironment, nectar flower, photosynthesis, Polaskia, Tehuacán, temperature},
pubstate = {published},
tppubtype = {article}
}
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
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
@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}
}