Differential Responses of Electrolyte Leakage and Pigment Compositions in Maize and Sorghum After Exposure to and Recovery from Pre- and Post-Flowering Dehydration

作     者：Abuhay Takele 

作者机构：Ethiopian Institute of Agricultural Research Melkassa Agricultural Research Center 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2010年第9卷第6期

页      面：813-824页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Ethiopian Agricultural Research Organization 

主　　题：anthocyanin carotenoid chlorophyll dehydration rehydration 

摘      要：Drought stress is often the most limiting factor to maize and sorghum production in the semi-arid *** study evaluates the response of electrolyte leakage,chlorophyll,carotenoid and anthocyanin contents in maize （***-2 and sorghum ***） after exposure to and recovery from pre- and post-flowering dehydration in plants grown in a controlled environment growth chamber under constant environmental conditions （12/12 h day/night,28-32/17°C day/night temperature,60-80% RH and PPFD of 1 200-1 400 μmol m-2 s-1）,at the Department of Botany,University of Cape Town,South *** was revealed that dehydration induced increases in electrolyte leakage was observed in both species during both pre- and post-flowering *** leakage was however,higher during post- than pre-flowering dehydration in both *** during both pre- and post-flowering stages caused a decrease in chlorophyll and carotenoid contents in both maize and *** and carotenoid contents of both pre- and post-flowering dehydrated sorghum was markedly higher than that of maize throughout the duration of the dehydration *** opposed to chlorophyll and carotenoid contents,anthocyanin contents increased during pre- and post-flowering dehydration in both *** were however,observed between both species in the response of anthocyanin content to pre- and post-flowering *** recovery of chlorophyll,carotenoid and anthocyanin contents were observed in those plants rehydrated during pre-flowering *** was however,no recovery in both species during post-flowering *** study should help understand some adaptive mechanisms developed by maize and sorghum during the dehydration and rehydration periods and contribute to identify useful traits for breeding programs.