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本文应用组织切片、电镜扫描及其它生物技术,初步展示了稻穗各部维管束的形态差异及其与谷粒发育成熟的辩证统一关系。稻穗各部维管束的发育程度直接影响养分转运和吸收,表现与秕粒率负相关;其各部差异则是决定强弱势颖花和穗平均秕粒率的主要原因之一。此外,作者还从转运机理上加以探讨,认为穗部营养的转运因强弱势颖花不同而不同,强势的以质流运输为主,弱势的则以活化运输为主,故弱势颖花易受环境条件影响。据此,本文提出相应措施供水稻栽培、育种参考。
In this paper, tissue sections, electron microscopy and other biotechnology were used to preliminary demonstrate the morphological differences of vascular bundles in different parts of rice and the dialectical unity with grain maturity. The developmental degree of vascular bundles in each part of rice directly affected the transport and absorption of nutrients, and the expression was negatively correlated with the grain yield. The differences among different parts were the main reasons that determined the average grain yield of strong and weak potential spikes and ears. In addition, the author also discussed from the transport mechanism, that the transport of spike nutrition because of different strengths and weaknesses of different spirits, the strong flow of mass-based transport, while the disadvantaged is based on activated transport, so the vulnerable vulnerable Environmental conditions affect. Accordingly, this article puts forward the corresponding measures for rice cultivation, breeding reference.