作物学报2005，Vol.31Issue(11)：1437-1442,6.
大豆品种自贡冬豆花芽分化及开花逆转过程的形态解剖学研究
Morphology and Anatomy of the Differentiation of Flower Buds and the Process of Flowering Reversion in Soybean cv. Zigongdongdou
摘要
Abstract
The morphological and anatomical changes during floral development and flowering reversion of Zigongdongdou, a late-maturing and photoperiod-sensitive soybean cultivar, were investigated to identify anatomic characteristics of floral development in soybean. The following photoperiod treatments were conducted to obtain different developmental status and morphological changes: (1) Continuous short days (SD, 12 h); (2) Continuous long days (LD, 16 h); and (3) SD for 13 days and then LD (SD13d-LD). The results showed that Zigongdongdou plants normally bloomed and podded in continuous SD. About 50% of plants in SD13d-LD treatment reversed from reproductive development to vegetative growth, and other plants in this treatment bore short terminal racemes. In continuous LD, all plants kept vegetative status. SD not only promoted reproductive development of soybean plants but increased the appearing rate of leaves as well. In SD treatment,the first floral primordia were found in basal axil of plants at Day 3, and the apical meristem began to initiate raceme at Day 13. At Day 19, the terminal flower primordia were first found in apex. At Day 29, plants began to bloom. Plants in the treatment of SD13d-LD kept initiating floral primordia within the first fourteen days after transferred from SD to LD, but the initiating rate was slower and the number of floral primordia was fewer than that in continuous SD. About half of plants reversed to initiate vegetative organs after transferring to LD for 20 days (33 days after emergence). While in continuous LD, the apical meristem only produced leaves. The homology of leaves and floral organs was also discussed in this paper.关键词
大豆/光周期/花发育/开花逆转/解剖结构Key words
Soybean/Photoperiod/Floral development/Flowering reversion/Anatomic structure分类
农业科技引用本文复制引用
李晓梅,吴存祥,马启彬,张胜,李春林,张新英,韩天富..大豆品种自贡冬豆花芽分化及开花逆转过程的形态解剖学研究[J].作物学报,2005,31(11):1437-1442,6.基金项目
This work was supported by the grants from the National Natural Science Foundation of China (30471054, 30490250), State Key Basic Research and Development Plan of China (2002CB111301), Beijing Natural Science Foundation (6012018), and National High Technology Research and Development Program of China (2003AA207060， 2004AA241060). （30471054, 30490250）
