北京林业大学学报2016，Vol.38Issue(1)：67-73,7.DOI:10.13332/j.1000-1522.20150340
风箱果的花部综合特征及繁育系统研究
Floral syndrome and breeding system of Physocarpus amurensis
摘要
Abstract
Physocarpus amurensis is an endangered shrub with an extremely narrow distribution in fragmented habitats.Its sexual reproductive capacity is low,and local population may be disappeared gradually.We studied the characteristics of pollination biology and breeding system of P.amurensis in the fragmented habitats through field observation and artificial pollination.Results showed that the life spans of single flowers and inflorescences were (5.1 ± 0.23) d and (8.4 ± 0.98) d,respectively.The flowering phase of a single flower can be divided into five periods in terms of flower morphology and dehiscence:"flower bud","pre-dehiscence","initial dehiscence","full dehiscence",and "end-dehiscence".Based on the results of pollen/ovule ratio,emasculation,bagging and artificial pollination studies,we found that the breeding system of P.amurensis is outcrossed and self-incompatible,and demands for pollinators.The fruit-setting ratio and seed-bearing ratio under natural conditions were low,(23.02 ± 6.08)% and (9.86 ± 2.86)%,respectively.The main reason might be that there are less species and quantities of pollinators and the pollination efficiency was lower in the fragmented habitats,suggesting that habitat fragmentation affects the early-stage reproduction success of P.amurensis.Artificial xenogamous pollination can significantly promote the fruit-setting and seed bearing ratios,reaching (60.17 ± 4.67)%and (49.61 ± 4.04)%,respectively.关键词
濒危植物/风箱果/花部特征/繁育系统Key words
endangered plant/Physocarpus amurensis/floral syndrome/breeding system分类
农业科技引用本文复制引用
殷东生,魏晓慧,沈海龙..风箱果的花部综合特征及繁育系统研究[J].北京林业大学学报,2016,38(1):67-73,7.基金项目
黑龙江省自然科学基金项目(C201341). （C201341）
