Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non-uniform pollination hypothesis

doi:10.1111/1442-1984.12218

CORC > 武汉植物园 > 中国科学院武汉植物园

	Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non-uniform pollination hypothesis
	Liao, Kuo 1; Wang, Zheng-Xiang 2,3,4; Li, Le-Na 4; Dai, Can 2,3,4
刊名	PLANT SPECIES BIOLOGY
	2018-10-01
卷号	33 期号:4 页码:259-267
关键词	architectural effects intra-inflorescence mating system non-uniform mating outcrossing rate
ISSN号	0913-557X
DOI	10.1111/1442-1984.12218
英文摘要	Flowering plants often exhibit declining resource investment to floral organs, fruits and seeds temporally or spatially in an inflorescence. To account for such variances, non-uniform pollination hypothesis, which highlights various mating environments each flower experiences, provides adaptive significance for allocation patterns but with controversial supports. Sagittaria trifolia (Alismataceae) was used to examine differences in seed number, seed weight and germination rate among sequential fruits within inflorescences. Ovule number was also investigated to evaluate allocation patterns in the floral stage. To test the non-uniform pollination hypothesis, we used three polymorphic microsatellite loci of S. trifolia to estimate the seed outcrossing rate in proximal and distal fruits. The results showed that the seed number, average seed weight and seed germination rate of S. trifolia gradually decreased from proximal to distal fruits within inflorescences. The percent of decrease in seed number between two contiguous fruits was 14.68 +/- 3.22%, which was much stronger than the percent of decrease in ovule number at 6.95 +/- 1.60%. Both proximal and distal fruits within inflorescences had high outcrossing rates (81.5 +/- 5.0%, proximal; 82.3 +/- 6.9%, distal) and they did not differ significantly. Overall, there was an acropetal decline of resource allocation to fruits within inflorescences of S. trifolia. Allocation pattern to ovules was not a limiting factor for seed production. The lack of difference in outcrossing rate between proximal and distal fruits indicated that the allocation strategy was probably not caused by non-uniform pollination, but more likely position effects.
资助项目	National Natural Science Foundation of China[31270279] ; National Natural Science Foundation of China[31670232] ; Shenzhen Key Laboratory of Southern Subtropical Plant Diversity ; Special Funds for the Young Scholars of Taxonomy of the Chinese Academy of Sciences[ZSBR-013]
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000446329300003
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/5938]
专题	中国科学院武汉植物园
通讯作者	Liao, Kuo
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 2.Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Hubei, Peoples R China 3.Hubei Collaborat Innovat Ctr Green Transformat Bi, Wuhan 430062, Hubei, Peoples R China 4.Hubei Univ, Sch Resources & Environm Sci, Wuhan 430062, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Liao, Kuo,Wang, Zheng-Xiang,Li, Le-Na,et al. Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non-uniform pollination hypothesis[J]. PLANT SPECIES BIOLOGY,2018,33(4):259-267.
APA	Liao, Kuo,Wang, Zheng-Xiang,Li, Le-Na,&Dai, Can.(2018).Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non-uniform pollination hypothesis.PLANT SPECIES BIOLOGY,33(4),259-267.
MLA	Liao, Kuo,et al."Sequential decline in fruit resource allocation within inflorescences of Sagittaria trifolia: a test of non-uniform pollination hypothesis".PLANT SPECIES BIOLOGY 33.4(2018):259-267.