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|本期目录/Table of Contents|

侧穗凤仙花的传粉生态和繁育系统

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年02期
页码:
160-166
栏目:
系统与演化植物学
出版日期:
2011-04-21

文章信息/Info

Title:
Pollination ecology and breeding system of Impatiens lateristachys (Balsaminaceae) endemic to China
作者:
毛志斌13 Cedric Boehler2 葛学军1*
1.中国科学院 华南植物园, 广州 510650; 2.Institut de Botanique,Université de Neuchtel, Neuchtel, CH2007, Switzerland; 3.中国科学院 研究生院, 北京 100049
Author(s):
MAO Zhi-Bin13 Cedric Boehler2 GE Xue-Jun1*
1.South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China; 2.Institut de Botanique, Université de Neuchtel, Neuchtel, CH2007, Switzerland; 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
凤仙花科 传粉 繁育系统 雌雄异熟 柱头运动 雌雄干扰
Keywords:
Balsaminaceae pollination breeding system dichogamy stigma movement malefemale interference
分类号:
-
DOI:
-
文献标识码:
A
摘要:
通过对峨眉山特有种侧穗凤仙花的开花生物学特性、花器官结构、传粉者种类和访花行为、繁育系统、花粉胚珠比(P/O)及花粉活力的研究。发现居群之间花的寿命变化比较大,它们的雄蕊期长,雌/雄蕊期比为0.12~0.17;花粉胚珠比达到4.6万,花粉在开花第一天有很高的活力(>90%);传粉者为熊蜂和天蛾,熊蜂包括贞洁熊蜂、白背熊蜂;存在盗蜜者灰熊蜂。侧穗凤仙花是自交亲和的异交植物,能通过雌雄异熟和独特的花部结构来避免自交及雌雄干扰。侧穗凤仙花存在柱头运动现象,并通过柱头运动增强了雌性功能。由于昆虫访花频率很低,侧穗凤仙花自然结果率(26%)很低,人工授粉明显增加了结果率(42%),说明侧穗凤仙花的低结果率可能和传粉者限制有关。
Abstract:
Pollination ecology and the breeding system of Impatiens lateristachys,a species endemic to the Emei Mountain were studied. The floral phenology,floral structure,pollenovule ratio(P/O),pollen viability,floral visitors and their behavior,and the breeding system were observed and determined. The flowering phase of the protandrous I.lateristachys lasted for a long time. The life span of an individual changed between the populations,but the female phasemale phase ratio was similar(0.12-0.17). The pollen/ovule ratio was 460 thousand,and pollen viability(MTT test)was at high level on the first day(>90%). The primary pollinators were Bombus festivus Smith and B.parthenius Richards;secondary pollinators were hawk moth;and B.grahami Frison was nectar gatherer. I.lateristachys was a selfcompatible species,its special floral structure and protandrous character could avoid selfing and intrafloral malefemale interference very well. The stigma movement of I.lateristachys was responsible for enhancing the function of the female. Fruit set was relatively low(26%)under natural conditions,but handpollination increased the fruit set(42%). And the pollinator visitation rate(0.2-2.0)was significantly lower than that of other congeneric species(71-8.9),indicating that the fruit set may be limited by the shortage of pollinators.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2011-04-25