Publicaciones | Ecofisiología agraria

Briones, O; Reyes-García, C; Díaz-Álvarez, E A; Tinoco-Ojanguren, C; de la Barrera, E; Andrade, J L

A few islands of preliminary research among a sea of unknown: moving plant ecophysiology forward in megadiverse countries Journal Article

Botanical Sciences, 98 (98), pp. 212-216, 2020.

Abstract | Links | BibTeX | Tags: atmospheric pollution, climate change, drought, ecophysiology, environmental productivity index, epiphytes, food security

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

Physiologia Plantarum, 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}
}

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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}
}

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