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
In: International Journal of Agriculture and Biology, vol. 20, no. 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.
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}
}