Reproductive biology of Primula beesiana (Primulaceae), an alpine species endemic to Southwest China
Reproductive biology of Primula beesiana (Primulaceae), an alpine species endemic to Southwest China
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DOI：
10.5091/plecevo.2015.867
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发表时间：
2015-01-01
影响因子：
1.1
通讯作者：
Ma, Yongpeng
中科院分区：
文献类型：
--
作者：
Huang, Yuan;Li, Naiwei;Ma, Yongpeng
背景与目的——报春花是中国西南特有的多年生高山植物，狭分布于喜马拉雅山东部和横断山脉。本研究的目的是阐明这种异柱物种在高山环境中的繁殖策略方法-评估花香并记录传粉者组合及其觅食行为。此外，2004年和2005年期间，对来自中国云南省丽江县玉龙山山脉的种群进行了繁殖系统调查。 主要结果 - 柠檬烯是主要的花香化合物，占41.2%，其次是α-蒎烯、双丙酮醇和月桂烯。与自体授粉、同体授粉和受精授粉相比，异体授粉的果实和种子结实率更高。在这两年的花形态之间检测到自花授粉和开放授粉后结籽的显着差异。两种常见的昆虫，熊蜂 Bombus lucorum 和蝴蝶 Hypolimnas misippus，是受检群体中最重要的传粉媒介，它们每小时访问花序的次数分别为 3.3 次和 2.3 次。结论 - beesiana 是专性异交者，但具有一定的自交亲和性。两年来，自花花粉针的种子集数都高于线花，这似乎与这种部分自交亲和性有关，而这种部分自花亲和性在二花报春属物种中经常被忽视。花香和花瓣颜色为授粉媒介提供了吸引信号，访问率很高。
Background and aims - Primula beesiana Forrest is a perennial alpine species endemic to southwest China, which is narrowly distributed in the eastern Himalaya and the Hengduan Mountains. The aim of this study is to elucidate the reproductive strategies of this heterostylous species in an alpine environmentMethods - Floral scents were assessed and the pollinator assemblage and their foraging behaviour were recorded. In addition, the breeding system was investigated during 2004 and 2005 in populations from the Yulong Shan range, Lijiang County of Yunnan Province, China.Key results - Limonene was the dominant floral scent compound, accounting for 41.2%, followed by a-pinene, diacetone alcohol and myrcene. Higher fruit and seed sets from inter-morph pollination were found compared to self, intra-morph and geitogamous pollination. Significant differences in seed set after self and open pollination were detected between flower morphs in both years. Two common insect species, the bumblebee Bombus lucorum and the butterfly Hypolimnas misippus, were the most important pollinators in the examined population, they visited the inflorescences 3.3 and 2.3 times per hour, respectively.Conclusion - beesiana is an obligate outcrosser, but with some self-compatibility. Seed set of self-pollinated pins was higher than that of thrums in both years, which seems to be related to this partial self-compatibility, which is often ignored in distylous Primula species. Floral scent and petal colour provide signals for pollinator attraction, and visitation rates are high.