Sequential stamen maturation and movement in a protandrous herb: mechanisms increasing pollination efficiency and reducing sexual interference

doi:10.1093/aobpla/plx019

CORC > 武汉植物园 > 中国科学院武汉植物园

	Sequential stamen maturation and movement in a protandrous herb: mechanisms increasing pollination efficiency and reducing sexual interference
	Xiao, Chang-Long 2; Deng, Hui 2; Xiang, Gan-Ju 2; Luguba, Kadiori Edwin 1; Guo, You-Hao 2; Yang, Chun-Feng 1
刊名	AOB PLANTS
	2017
卷号	9 页码:11
关键词	Movement herkogamy pollen presentation theory pollen transfer efficiency pollination sexual interference stamen movement
ISSN号	2041-2851
DOI	10.1093/aobpla/plx019
英文摘要	Successive stamen movement directly controls pollen presentation schedules through sequential stamen maturation and changes the extent of herkogamy by altering the positions of sexual organs. However, the implications of such movements in terms of pollination are not well understood. Pollen presentation theory predicts that staggered pollen presentation should be favoured when plants are subject to diminishing returns on pollen transfer. Herkogamy on the other hand, has been interpreted as an adaptive trait that reduces sexual interference in hermaphrodite flowers. In this study, we conducted floral manipulations to determine the function of successive stamen movement in pollen transfer. By artificially manipulating the flowers to present two anthers simultaneously in the floral centre, we attempted to investigate whether changes in the anther presentation strategy affect pollen removal, deposition and the efficiency of pollinators. Compared with the natural treatment, the pollen transfer efficiency of halictid bees decreased significantly when the flowers were manipulated to present two anthers simultaneously. Although the presentation of two anthers simultaneously led to a similar pollen removal rate, there was a significant reduction in pollen deposition on neighbouring stigmas. To evaluate the effect of movement herkogamy on pollen export and deposition and seed set, the flowers were manipulated with or without the movement of stamen bending out from the floral centre. Pollen export decreased significantly when the central anther was moved away from the pistil, and pollen deposition and seed set declined significantly when the five spent anthers were retained on the pistil. Our study provides good support for the pollen presentation theory and provides direct experimental evidence that successive stamen movement could increase pollen transfer efficiency by sequential stamen maturation. Moreover, movement herkogamy promotes pollen export, deposition and seed set, and could therefore be regarded as an effective mechanism to reduce interference between male and female functions.
资助项目	National Natural Science Foundation of China[31170214] ; National Natural Science Foundation of China[31370263] ; National Natural Science Foundation of China[31070206]
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000410136200001
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/1426]
专题	中国科学院武汉植物园
通讯作者	Guo, You-Hao; Yang, Chun-Feng
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Hubei, Peoples R China 2.Wuhan Univ, Coll Life Sci, Wuhan 430072, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Chang-Long,Deng, Hui,Xiang, Gan-Ju,et al. Sequential stamen maturation and movement in a protandrous herb: mechanisms increasing pollination efficiency and reducing sexual interference[J]. AOB PLANTS,2017,9:11.
APA	Xiao, Chang-Long,Deng, Hui,Xiang, Gan-Ju,Luguba, Kadiori Edwin,Guo, You-Hao,&Yang, Chun-Feng.(2017).Sequential stamen maturation and movement in a protandrous herb: mechanisms increasing pollination efficiency and reducing sexual interference.AOB PLANTS,9,11.
MLA	Xiao, Chang-Long,et al."Sequential stamen maturation and movement in a protandrous herb: mechanisms increasing pollination efficiency and reducing sexual interference".AOB PLANTS 9(2017):11.