乌拉尔甘草开花特性研究
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篇名: 乌拉尔甘草开花特性研究
TITLE:
摘要: 目的:研究甘草开花规律,为甘草杂交育种提供理论依据。方法:观察甘草开花顺序、花的外部形态与内部结构的相关性、一日开花高峰期和朵花开放动态,同时测定花粉-胚珠比(P/O)以及开花不同时期的花粉生活力。结果:甘草主茎上的花序先开,开放顺序为从下至上,开至3~5个花序时侧枝上的花序开始开放,开放顺序亦为从下至上。旗瓣开缝大小与小花的散粉情况密切相关。10:00-13:00和15:00-18:00时间段是甘草的一日开花高峰期。朵花从开放至合拢约需32 h,至萎蔫约需35 h。P/O=260.46,为兼性异交。旗瓣张开2~5 mm时花粉生活力最高。结论:该研究结果可指导甘草有性杂交育种,为甘草的新品种培育奠定良好的理论基础。
ABSTRACT: OBJECTIVE: To study the regularity of Glycyrrhiza uralensis, and to provide theoretic basis for cross breeding of G. uralensis. METHODS: The flowering sequence of G. uralensis was observed, as well as the correlation of flower external morphology and internal structure, flowering rush hour a day, flower blooming dynamics. At the same time, pollen-ovule ratio (P/O) and pollen viability at different flowering periods were determined. RESULTS: Flowers on main stem firstly bloomed, the opening order was bottom-up, and when three to five flowers bloomed, the lateral branch began to bloom, which order was also bottom-up. There was a closely correlation between the situation of pollen shedding and the size of banner blooming. 10:00-13:00 and 15:00- 18:00 were flowering rush hour. A flower from bloom to closed needed about 32 hours, wilting about after 35 hours. P/O=260.46, it was facultative xenogamy. When banner bloomed 2-5 mm, the pollen had the highest life force. CONCLUSIONS: The results can guide the sexual hybridization breeding of G. uralensis, and lay a good theoretical basis for its new varieties breeding.
期刊: 2016年第27卷第13期
作者: 高素芳,张延红,陈红刚,李金田,杜弢
AUTHORS: GAO Sufang,ZHANG Yanhong,CHEN Honggang,LI Jintian,DU Tao
关键字: 甘草;开花顺序;一日开花动态;朵花开放动态;花粉-胚珠比
KEYWORDS: Glycyrrhiza uralensis; Flowering sequence; Flowering rush hour a day; Flower blooming dynamics; Pollen-ovule ratio
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