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

作   者：彭向永 ，赵利清 ， 毛金梅 ， 翟飞飞 ， 孙振元
期刊名称：植物资源与环境学报
影响因子：
卷 期 号：26（1）
页     码：110-112
关键词：蒿 柳；开花物候期；开放过程；花粉萌发率；柱头可授性
论文摘要：
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.