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The Relationships Between Seed Setting Rate and Leaf Structure of Ratoon Crop of Hybrid Rice Shanyou 63

Zhang Dapeng(Department of Fundamental Subjects,FAU,Fuzhou 350002)  
Threc upper leaves of main stems and ratoon stems of medium hybrid rice Shangou 63 were anatomized comparatively. As compared with main-crop,ratooning rice posessed a litter larger area indices of stomatal apparatuses of leaves on the same positions, more mesophyll cell layers and folds of cell walls which made more petais and increased inner area and intercellular spaces, as well as higher density of lateral veins, the number of vessels, crosswise area of xylems,the number of sieve tubes and crosswise area of phloems, which were required for forming one plump kernel,were found to be more in ratooning rice than in main-crop. It was suggested to be the inner structural bases for getting plump kernels and higher seed setting rates by promoting the efficiency of photosynthesis and conduction.Leaves of ratooning rice were smaller in comparison with those of main-crop for the reductions of numbers of dividing cells of leaf primordia during development.
【CateGory Index】: S511.101
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