水稻不同穗型品种穗部枝梗维管束与籽粒充实特性的研究  

Characteristics of the vascular bundles in the panicle and their relations to the grain-filling for the different panicle types of rice

作　　者：明东风[1] 马均[1] 马文波[1] 许凤英[1] 严志彬[1] 

机构地区：[1]四川农业大学水稻研究所,四川温江611130

出　　处：《西南农业学报》2004年第4期409-412,共4页Southwest China Journal of Agricultural Sciences

基　　金：农业部跨越计划;四川省教育厅;四川省人才培养基金资助

摘　　要：本文对不同穗重类型水稻穗部枝梗维管束特征及籽粒充实进行了研究,结果表明:穗部各部位枝梗的维管束数目、单个维管束面积、维管束总面积及韧皮部总面积表现为重穗型>中穗型>轻穗型品种。而各部位枝梗有效库容量与枝梗韧皮部的总面积之比及其籽粒充实程度均为重穗型与中穗型品种相当,但前者高于轻穗型品种而后者则低于轻穗型品种。发达的枝梗维管束是籽粒充实正常的前提,下部枝梗维管束发育较差,可能是其籽粒(多为弱势粒)充实不良的重要原因。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.

关 键 词：水稻 穗重类型 枝梗 维管束 籽粒充实 

分 类 号：S511.01[农业科学—作物学]