Effect of drought on leaf gas exchange, carbon isotope discrimination, transpiration efficiency and productivity in field grown durum wheat genotypes

Manakin: DSpace XMLUI Project v2

Effect of drought on leaf gas exchange, carbon isotope discrimination, transpiration efficiency and productivity in field grown durum wheat genotypes

Cómo citar
Cómo citar

Effect of drought on leaf gas exchange, carbon isotope discrimination, transpiration efficiency and productivity in field grown durum wheat genotypes

.
Copiar
Título: Effect of drought on leaf gas exchange, carbon isotope discrimination, transpiration efficiency and productivity in field grown durum wheat genotypes
Autor: Monneveux, Philippe; Rekika, Djamila; Acevedo Hinojosa, Edmundo; Merah, Othmane
Resumen: Under drought prone conditions, wheat productivity is strongly related to photosynthetic activity and transpiration efficiency. In the present study, photosynthesis related traits were assessed at anthesis under rainfed and irrigated conditions on five durum wheat (Triticum durum Desf.) cultivars grown under Mediterranean conditions. Carbon isotope discrimination was also evaluated in flag leaf at anthesis (Delta L-a) and grain at maturity (Delta G(m)). Under rainfed conditions, highly significant correlations were found between both Delta L-a and Delta G(m), and leaf CO2 exchange rate (CER), stomatal conductance (g(s)) and internal to ambient CO2 concentration ratio (C-1/C-a). Delta G(m) was correlated negatively with transpiration efficiency (measured as CER/g(s)) under tainted conditions, and positively under irrigated conditions. Under both conditions, Delta G(m) was positively associated with grain yield. No significant correlation was observed between mesophyll conductance and CER. In contrast, the latter trait was positively related to g, under irrigated conditions suggesting that CER was driven by stomatal limitations. No correlation was found between Delta L-a. and grain yield. It is concluded that breeding for high Delta G(m) would lead, under Mediterranean drought conditions, to higher stomatal conductance, lower transpiration efficiency and higher grain yield.
URI: http://www.captura.uchile.cl/handle/2250/5987
Fecha: 2006-04
Cita del item: PLANT SCIENCE Volume: 170 Issue: 4 Pages: 867-872 Published: APR 2006


Archivos vinculados

Formato: Nombre: Tamaño: Descripción: Ver
PDF
Monneveux_Philippe.pdf
190.7Kb
Abrir / Descargar

El ítem tiene asociados los siguientes archivos de licencia:

Este ítem aparece en la(s) siguiente(s) colección(ones)