2004•Xi'nan nongye xuebaoRequires access
Characteristics of the vascular bundles in the panicle and their relations to the grain-filling for the different panicle types of rice
Yan Zhi-bing
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Abstract
The characteristics of the vascular bundles in the panicle and their relations to the grain-filling for the different panicle types of rice were studied.The results indicated that the number of vascular bundle,the area of for 1 vascular bundle,the area for all vascular bundles and the area for all phloem in the branches of different position of panicle of heavy-panicle type were larger than that of middle-panicle type and the latter were larger than that of light-panicle type.The vascular bundle in the branches of different position of panicle in heavy-panicle types and middle-panicle types had a similar effective sink load and sink-filling percentage,which were higher and lower than that in light-panicle types,respectively.The developed vascular bundles in the panicle were a basic structural factor to good grain-filling.The undeveloped vascular bundles in the low position of the panicle might be main factor to low grain-filling.