Evaluation of Chlorophyll Content and Fluorescence Parameters as Indicators of Drought Tolerance in Barley

作     者：LI Rong-hua GUO Pei-guo Michael Baum Stefania Grando Salvatore Ceccarelli 

作者机构：College of Life Science Guangzhou University Guangzhou 510006 P.R.China International Center for Agricultural Research in the Dry Areas （ICARDA） P.O. Box 5466 Aleppo Syria 

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

年 卷 期：2006年第5卷第10期

页      面：751-757页

学科分类：09[农学] 0901[农学-作物学] 

基　　金：Federal Ministry of Economic Cooperation and Development International Center for Agricultural Research Bundesministerium für Wirtschaftliche Zusammenarbeit und Entwicklung, BMZ 

主　　题：barley (Hordeum vulgare L.) chlorophyll chlorophyll fluorescence parameters drought tolerance 

摘      要：Drought is a major abiotic stress that severely affects food production worldwide. Agronomic and physiological traits associated with drought tolerance are suitable indicators for selection of drought tolerance genotypes to reduce the impact of water deficit on crop yield in breeding program. The objective of this study was to identify indicators related to drought tolerance through analysis of photosynthetic traits in barley （Hordeum vulgare L.）. These traits included chlorophyll content, initial fluorescence （Fo）, maximum primary yield of photochemistry of photosystem Ⅱ （Fv /Fo） and maximum quantum yield of photosystem Ⅱ （Fv/Fm）. Four genotypes （Tadmor, Arta, Morocco9-75 and WI2291） variable in drought tolerance were used to investigate the correlation between these traits and drought tolerance. The results reflected that all of these traits were affected negatively in the four genotypes at different levels of post-anthesis drought stress, but the decrease in drought tolerant genotypes was much less than that of drought sensitive genotypes. The results further revealed that the components of the photosynthetic apparatus could be damaged significantly in drought sensitive genotypes, while drought tolerant genotypes were relatively less affected. On the other hand, the values of chlorophyll content, Fo, Fv/Fo and Fv/Fm in drought tolerance genotypes were significantly higher than those in drought sensitive genotypes under drought stress. It was concluded that chlorophyll content, Fo, Fv/Fo and Fv/Fm could be considered as reliable indicators in screening barley germplasm for drought tolerance.