Phenotypical, physiological and biochemical traits of the vegetative growth of wild tepary bean (Phaseolus acutifolius) under restricted water conditions
Por:
Leal-Delgado, Reynaldo, Pena-Valdivia, Cecilia B., Garcia-Nava, Rodolfo, Garcia-Esteva, Antonio, Martinez-Barajas, Eleazar, Padilla-Chacon, Daniel
Publicada:
1 ene 2019
Resumen:
Tepary bean (Phaseolus acutifolius A. Gray) is distributed in arid and
semi-arid regions from Arizona to the northern areas of Mexico. The
objective of this study was to quantify the effects of water deficit on
vegetative growth in four accessions of wild tepary bean from Chihuahua
(10020), Durango (10006 and 10017) and Nayarit (10011) in Mexico. For
analysis, 30-day-old plants were placed in pots containing 1.5 L of
soil. One group of plants was watered to field capacity (FC), and in the
two other groups watering was withheld to maintain soil at 25% and 50%
FC. Plant water potential (psi(W)) and chlorophyll a fluorescence
(F-v/F-m) were indicators of plant stress and there was a significant
difference in plant growth. The data obtained with phenotyping platform
showed a biomass reduction of 20% in 10020, 10006 and 10011 and
approximately a 30% biomass increase in 10017. The 25% and 50% FC
groups showed decreased glucose and fructose concentrations (50%). In
contrast, sucrose concentrations increased in the 10006, 10011 and 10020
accessions but not in 10017. Surprisingly, sucrose content under water
deficit in accession 10020 increased by twice the amount of well-watered
plants.
Filiaciones:
Leal-Delgado, Reynaldo:
Colegio Postgrad, Bot, Km 36-5 Carretera Mexico Texcoco, Montecillo 56230, MX, Mexico
Pena-Valdivia, Cecilia B.:
Colegio Postgrad, Bot, Km 36-5 Carretera Mexico Texcoco, Montecillo 56230, MX, Mexico
Garcia-Nava, Rodolfo:
Colegio Postgrad, Bot, Km 36-5 Carretera Mexico Texcoco, Montecillo 56230, MX, Mexico
Garcia-Esteva, Antonio:
Colegio Postgrad, Bot, Km 36-5 Carretera Mexico Texcoco, Montecillo 56230, MX, Mexico
Martinez-Barajas, Eleazar:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Bioquim, Mexico City 04510, DF, Mexico
Padilla-Chacon, Daniel:
CONACyT Colegio Postgrad, Bot, Km 36-5 Carretera Mexico Texcoco, Montecillo 56230, MX, Mexico
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