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《Jiangsu Journal of Agricultural Sciences》 2012-06
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Effects of drought and flooding stress on photosynthetic characteristics of pecan Carya illinoinensis Wangenh.and ultrastructure of its chloroplasts

LIU Guang-qin1,ZHU Hai-jun1,2,ZHOU Bei-bei1,SHENG Jing-ya1,ZANG Xu3(1.Institute of Horticulture,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;2.College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China;3.Jiangsu Nongken Group Co.,Ltd.,Nanjing 210008,China)  
One-year-old pecan seedlings were adopted as materials to investigate the influences of drought and flooding stress on the photosynthetic characteristics and ultrastructure of chloroplast.Results showed that pecan seedlings were more sensitive to drought than to flooding.After ten-day drought,leaves wilted,photosynthetic ability lost,and lysosomes and osmophores increased sharply,whereas high photosynthetic ability and stable ultrastructure of chloroplasts were detected at day 10 after flooding.Chloroplast structures were completely destroyed,and most organelles were dissolved after thirty-day drought.After thirty-day flooding,pecan leaves turned yellow with spots appearing,accompanied with destruction in ultrastructure of leaves,including swelling chloroplast,increased osmophore and loosened chloroplast lamellae.
【Fund】: 2011年江苏省林业三项工程项目[lysx(2011)14];; 2012年国家林业公益性行业科研专项(201204404);; 2010年中央财政林业科技推广项目[(2010)TJS04]
【CateGory Index】: S664.1
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