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Effect of terminal locations of pods on biomass production and ^(13)C partitioning in a fasciated stem soybean Shakujo

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第1期12卷 72-82页

作者： Kyosuke YAMADA Aoi SASAKURA Kiyoshi NISHIWAKI Hany A.EL-SHEMY Pravat K.MOHAPATRA Nguyen T.NGUYEN Hideki KUROSAKI Syunsuke KANAI Junki ITO kounosuke fujita Department of Environmental Dynamics and Management Graduate School of Biosphere SciencesHiroshima University Nagano Chushin Agricultural Experimental Station Faculty of Agriculture Research Park (FARP) and Biochemistry Department Faculty of AgricultureCairo University School of Life Sciences Sambalpur University Hokkaido Prefectural Kitami Agricultural Experiment Station Hiroshima Prefectural Agriculture Research Center

This study addresses the hypothesis that stagnation of soybean yield on the farm can be improved by selection of a physiological trait favoring carbon assimilate partitioning to terminally placed pods versus genotypes having axillary pods at close plant spacing.13C was fed to source-sink units comprising a leaf,axillary/terminal pods,and petioles at upper and lower positions of the stem axis in two soybean cultivars,namely Shakujo and Enrei,at different densities of *** cultivars differ significantly in architecture,Shakujo bearing a few hundreds of pods in close succession to one another in a terminally placed raceme,in contrast to Enrei having axillary *** yield per plant was higher in Enrei than in Shakujo at low density,but Shakujo out-yielded Enrei at close *** density decreased yield per plant and altered the pattern of assimilate partitioning significantly within the plants for both *** high density more assimilates moved to the upper parts at the cost of the lower *** terminally placed pods of Shakujo were advantaged to receive assimilates under density *** benefit was accrued to pod filling of Enrei,however,under this condition.

关键词： Fasciated stem Grain yield Photosynthesis Photosynthate partitioning Population density Soybean Source-sink unit

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