Flower Color Polymorphism in Rhododendron cyanocarpum (Ericaceae), an Endangered Alpine Species Endemic to NW Yunnan, China
Flower Color Polymorphism in Rhododendron cyanocarpum (Ericaceae), an Endangered Alpine Species Endemic to NW Yunnan, China
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中国云南西北部特有的濒危高山植物蓝果杜鹃（杜鹃花科）的花色多态性
DOI：
10.7677/ynzwyj201514068
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发表时间：
2015-01-01
期刊：
影响因子：
--
通讯作者：
Sun Wei-bang
中科院分区：
文献类型：
--
作者：
Ma Yong-peng;Wu Zhi-kun;Sun Wei-bang
Rhododendron cynnocarpum is a narrow endemic species with pink and white floral color. In the present study, to investigate the significance of petal color morphs, we examined color morph frequencies, petal color reflectance and other associated floral characters, effective pollinators, visitation frequencies, and fruit production in the field. In all surveyed known populations, plants with pink color morph dominanted and comprised 77%-100% of individuals. Two peaks at 430 nm and 650 nm were found in the petal color reflectance of pink flowers, and only one peak at 430 nm was found in the reflectance spectrum of white flowers. In addition, color morphs were also associated with colors of style and stigma, lengths of corolla, calyx and pedicel, the closest distance between stigma and stamen, hut not with style length and nectar production. Moreover, higher visitation frequency of their shared pollinators ( bumblebees) and fruit production were observed of pink flowers than white flowers. Despite a briefly temporal and spacial study, we suggest that color morph frequencies, visit frequencies of bumblebees and fruit production, all favor to be stablifizing selection for the pink color morph.
