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Photosynthesis,Metabolite Composition and Anatomical Structure of Oryza sativa and Two Wild Relatives,*** and ***

Rice science 2017年第4期24卷 218-227页

作者： Jwakyung SUNG Suyeon LEE Jong-Wook CHUNG Gerald EDWARDS hojin ryu Taewan KIM National Institute of Agricultural Science Rural Development Administration(RDA)WanjuJeollabu-do 55365Korea Department of Industrial Plant Science and Technology Chungbuk National UniversityCheongju 28644Korea School of Biological Science Washington State UniversityPullmanWA 99164-4236USA Department of Biology Chungbuk National UniversityCheongju 28644Korea Department of Plant Resources and Science and Institute of Ecological Phytochemistry Hankyung National UniversityAnseong 17579Korea

Photosynthesis, enzyme activities and metabolite pools associated with primary carbon metabolism in leaves were studied in O. grandiglumis and O. alta （wild relatives of rice which produce high biomass） versus O. sativa （a japonica cultivar and a indica-japonica hybrid） to assess their potential for identifying traits which might be utilized to enhance rice productivity. The wild relatives had higher rates of photosynthesis on a fresh weight basis, and higher water use efficiency than the O. sativa lines. There were no striking differences in activities of a number of key enzymes in carbon and nitrogen metabolism between the wild relatives and cultivated rice lines. Along with higher rates of photosynthesis on a fresh weight basis, the leaves of the two wild species had higher nitrate content, higher levels of starch, glucose and fructose, and higher levels of organic acids （malate, succinate and acetate）, compared to the O. sativa lines. The results suggested that O. grandiglumis and O. alta have differences in physiology and primary metabolism which might be exploited to improve growth and productivity of cultivated rice.

关键词： carbohydrate photosynthesis rate nitrogen assimilation metabolite composition leaf rice wild relative

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