<b>Mechanisms for water-use efficiency between bean cultivars tolerant to drought are different

  • Victor Montero Tavera Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
  • César Leobardo Aguirre Mancilla Instituto Tecnológico de Roque
  • Jorge Alberto Acosta Gallegos Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
  • Juan Gabriel Rámirez Pimentel Instituto Tecnológico de Roque
  • Ana Isabel Mireles Arriaga Universidad de Guanajuato
  • Jorge Eric Ruiz Nieto Universidad de Guanajuato

Resumo

 

The water-use efficiency (WUE) has been proposed as an alternative to mitigate the effects of climate change in agriculture and to reduce pressure on water resources, mainly in species with high water requirements which are grown under rainfed conditions. The aim of this study was to characterize the instantaneous, integral and molecular WUE of four bean cultivars contrasting in their response under limiting water conditions to compare the component mechanisms of this trait between drought tolerant and susceptible cultivars. Results indicated that tolerant cultivars increased their instantaneous WUE in comparison to susceptible ones; however, there was a difference between cultivars since Pinto Villa had a higher stomatal conductance and transpiration rate, leading to a higher water cost to produce seed than Pinto Saltillo. Furthermore, ycf2, rrn16, rpoC2, hardy, ndhK, erecta and ycf1 WUE genes were only overexpressed in Pinto Saltillo under limited water conditions, which turned out to be the most WUE efficient cultivar. Therefore, the component mechanisms of WUE are different even between drought tolerant cultivars and the mechanisms by which the tolerant cultivars increased their instantaneous and integral WUE were different.

 

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Biografia do Autor

Victor Montero Tavera, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
Unidad de Biotecnológia
César Leobardo Aguirre Mancilla, Instituto Tecnológico de Roque
Departamento de Estudios de Posgrado e Investigación
Jorge Alberto Acosta Gallegos, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
Programa de Mejoramiento Génetico de Frijol
Juan Gabriel Rámirez Pimentel, Instituto Tecnológico de Roque
Departamento de Estudios de Posgrado e Investigación
Ana Isabel Mireles Arriaga, Universidad de Guanajuato
Departamento de Agronomía
Jorge Eric Ruiz Nieto, Universidad de Guanajuato
Departamento de Agronomía
Publicado
2018-08-01
Como Citar
Tavera, V. M., Aguirre Mancilla, C. L., Acosta Gallegos, J. A., Rámirez Pimentel, J. G., Mireles Arriaga, A. I., & Ruiz Nieto, J. E. (2018). <b&gt;Mechanisms for water-use efficiency between bean cultivars tolerant to drought are different. Acta Scientiarum. Agronomy, 40(1), e39378. https://doi.org/10.4025/actasciagron.v40i1.39378
Seção
Genética e Melhoramento

 

2.0
2019CiteScore
 
 
60th percentile
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2.0
2019CiteScore
 
 
60th percentile
Powered by  Scopus