2019年10月17日 星期四
北京地区蒿柳的开花物候期及单花序开放过程中花粉活力和柱头可授性变化
Flowering phenology and changes in pollen activity and stigma receptivity during blossom process of single inflorescence of Salix viminalis in Beijing
2017年 第26卷 第1期 页码[110-112]    下载全文[0.9MB]  
Abstract

Flowering phenology and flowering dynamics of female and male inflorescences of Salix viminalis Linn. in Beijing were observed in 2015 and 2016, and changes in pollen activity and stigma receptivity were also investigated. The results show that early flowering stage of S. viminalis in Beijing is happened in early-March, flowering period is 11-18 d, and flowering pattern is the first opening type of male flower. Flowering period of single inflorescence in male and female plants is 10-15 d and 8-10 d, respectively, which can be divided into five stages: emerging color stage, initial flowering stage, half flowering stage, full flowering stage and withered stage. Flowering date of male plant is earlier about 3-4 d than that of female plant. However, the difference of full flowering stage between male and female plants is only 1 d. Pollen germination rate and stigma receptivity show a trend of firstly increasing then decreasing during blossom process. Pollen germination rate reaches the highest of 72% at full flowering stage, and stigma receptivity is more than 90% at half and full flowering stages. Therefore, it is suggested that pollen collection and pollination in mid-March can improve success rate of cross breeding of S. viminalis.

关键词蒿柳; 开花物候期; 开放过程; 花粉萌发率; 柱头可授性
Key wordsSalix viminalis Linn.; flowering phenology; blossom process; pollen germination rate; stigma receptivity
作者彭向永1, 赵利清1,2, 毛金梅1,3, 翟飞飞1, 孙振元1
所在单位1. 中国林业科学研究院林业研究所 国家林业局林木培育重点实验室, 北京 100091; 2. 国家开放大学, 北京 100039; 3. 新疆林业科学院经济林研究所, 新疆 乌鲁木齐 830063
点击量440
基金项目国家林业公益性行业科研专项(201304115); 林木遗传育种国家重点实验室专项(CAFYBB2016ZX001-3)