CHANGE IN FLORAL ORIENTATION IN ANISODUS LURIDUS (SOLANACEAE) PROTECTS POLLEN GRAINS AND FACILITATES DEVELOPMENT OF FERTILIZED OVULES

doi:10.3732/ajb.1000010

	CHANGE IN FLORAL ORIENTATION IN ANISODUS LURIDUS (SOLANACEAE) PROTECTS POLLEN GRAINS AND FACILITATES DEVELOPMENT OF FERTILIZED OVULES
	Wang, Yun 1,2; Meng, Li-Lua 3; Yang, Yong-Ping1,2 ; Duan, Yuan-Wen1,2
	2010-10-01
发表期刊	AMERICAN JOURNAL OF BOTANY
ISSN	0002-9122
卷号	97 期号:10 页码:1618-1624
摘要	Premise of the study : Some floral traits could be selected by pollinators and nonpollinator agents, and studying the floral traits shaped by physical agents could reveal adaptive mechanisms to the environment. We explored the adaptive significance of the change in floral orientation, from pendulous flowers to erect fruits that have a persistent calyx, in Anisodus luridus, a perennial native to the Qinghai-Tibet Plateau (QTP). Methods : We examined the effect of flower orientation on pollinator visitation rates, pollen deposition efficiency, pollen quantity, and pollen viability to estimate whether pendulous flowers have improved male fitness. We then measured seed production and seed germination rate to assess whether erect fruits have enhanced female fitness. Key results : Pendulous flowers did not have any preferred pollinators or increased pollen deposition. In artificially erected flowers, the number of pollen grains greatly decreased after rainwash. Pollen germination experiments indicated that pollen damage by water and exposure to solar radiation is serious. In the persistent calyx that holds water within it, the temperature inside the calyx changed slower than in the calyx that had the water removed. After supplemental pollination, the seed number, seed set, and seed mass of fruits that had water removed from the calyx were reduced greatly in both years. Conclusions : We conclude that the change in floral orientation could enhance male and female fitness of A. luridus and is effectively adaptive to the alpine environments, indicating a strong selection by the combined pressure from various abiotic nonpollinator agents in shaping the floral traits of this alpine plant.; Premise of the study : Some floral traits could be selected by pollinators and nonpollinator agents, and studying the floral traits shaped by physical agents could reveal adaptive mechanisms to the environment. We explored the adaptive significance of the change in floral orientation, from pendulous flowers to erect fruits that have a persistent calyx, in Anisodus luridus, a perennial native to the Qinghai-Tibet Plateau (QTP).
关键词	Anisodus Luridus Male/female Fitness Persistent Calyx Pollen Viability Qinghai-tibet Plateau Rain Solanaceae Solar Radiation
学科领域	Plant Sciences
DOI	10.3732/ajb.1000010
收录类别	SCI
语种	英语
WOS记录号	WOS:000282513800012
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/2613
专题	中国科学院青藏高原研究所昆明部
作者单位	1.CAS, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China 2.CAS, Inst Tibetan Plateau Res Kunming, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China 3.Yunnan Normal Univ, Life Coll, Kunming 650092, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yun,Meng, Li-Lua,Yang, Yong-Ping,et al. CHANGE IN FLORAL ORIENTATION IN ANISODUS LURIDUS (SOLANACEAE) PROTECTS POLLEN GRAINS AND FACILITATES DEVELOPMENT OF FERTILIZED OVULES[J]. AMERICAN JOURNAL OF BOTANY,2010,97(10):1618-1624.
APA	Wang, Yun,Meng, Li-Lua,Yang, Yong-Ping,&Duan, Yuan-Wen.(2010).CHANGE IN FLORAL ORIENTATION IN ANISODUS LURIDUS (SOLANACEAE) PROTECTS POLLEN GRAINS AND FACILITATES DEVELOPMENT OF FERTILIZED OVULES.AMERICAN JOURNAL OF BOTANY,97(10),1618-1624.
MLA	Wang, Yun,et al."CHANGE IN FLORAL ORIENTATION IN ANISODUS LURIDUS (SOLANACEAE) PROTECTS POLLEN GRAINS AND FACILITATES DEVELOPMENT OF FERTILIZED OVULES".AMERICAN JOURNAL OF BOTANY 97.10(2010):1618-1624.

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