论文部分内容阅读
水稻茎秆大维管束是营养器官向穗部输送水分、矿质和有机养料的通道。星川的研究结果,稻穗上每个一次枝梗内部都有与茎秆相通的一个大维管束,穗轴中的大维管束数,随穗节节位的升高而递减。因而,茎秆中大维管束数的多少和穗上一次枝梗和总颖花数有着密切的正相关关系。一些观察结果认为水稻茎秆基部第一节间的大维管束数与一次枝梗数的比例为3:1—4:1,而另一些研究结果认为茎第二节间与穗颈节间的大维管束数的比例,因水稻品种而不同可分5种比例类型,而水稻品种区分为大穗型、小穗型、偏大穗型、中间型等恰与这些比值有关。因此,了解茎内大维管束数和穗一次枝梗数间的比例关系,以
Rice stem big vascular bundle is nutrition organs to spike water, mineral and organic nutrients channel. Xingchuan’s results showed that there was a large vascular bundle in stems in each primary branch of panicle, and the number of large vascular bundles in panicles decreased with the increase of panicles. Therefore, there is a close positive correlation between the number of big vascular bundles in stem and the number of the last branch and the total number of spikes in the ear. Some observations suggest that the ratio of the number of large vascular bundles to the number of primary branches in the first internode at the base of rice stems is 3: 1 to 4: 1, while other studies suggest that the large internodes between stems and panicles The proportion of vascular bundles, due to different rice varieties can be divided into five types of proportion, and the rice varieties are divided into large panicle type, spikelet type, large panicle type, intermediate type, and so on these ratios. Therefore, to understand the stem within the big vascular bundles and the number of spike once the ratio between the branches to