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.
2016
Villa-Reyes, F.; de la Barrera, E.
Environmental cues for germination of the invasive bunch grass Pennisetum ciliare (L.) Link Journal Article
In: Acta Physiologiae Plantarum, vol. 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.
2011
Guillén, S.; Terrazas, T.; de la Barrera, E.; Casas, A.
Germination differentiation patterns of wild and domesticated columnar cacti in a gradient of artificial selection intensity Journal Article
In: Genetic Resources and Crop Evolution, vol. 58, pp. 409-423, 2011.
Links | BibTeX | Tags: artificial selection, cactus, desert, domestication, germination, management, Mesoamerica, Tehuacán
@article{Guillén2011,
title = {Germination differentiation patterns of wild and domesticated columnar cacti in a gradient of artificial selection intensity},
author = {S. Guillén and T. Terrazas and E. de la Barrera and A. Casas},
url = {http://agro.mx/wp-content/uploads/2016/06/023-Guillén-et-al-2011-Genet-Resour-Crop-Evol.pdf},
year = {2011},
date = {2011-07-01},
journal = {Genetic Resources and Crop Evolution},
volume = {58},
pages = {409-423},
keywords = {artificial selection, cactus, desert, domestication, germination, management, Mesoamerica, Tehuacán},
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
In: Journal of Arid Environments, vol. 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}
}