气候变化领域集成服务门户(CCPortal): Environmental and seed-position effects on viability and germination of buried seeds of an invasive diaspore-heteromorphic annual grass

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DOI	10.1111/ppl.14353
	Environmental and seed-position effects on viability and germination of buried seeds of an invasive diaspore-heteromorphic annual grass
	Wang, Ai Bo; Baskin, Carol C.; Baskin, Jerry M.; Ding, Jianqing
发表日期	2024
ISSN	0031-9317
EISSN	1399-3054
起始页码	176
结束页码	3
卷号	176 期号:3
英文摘要	Environmental factors, such as temperature and moisture, and plant factors, such as seed position on the mother plant, can affect seed viability and germination. However, little is known about the viability and germination of seeds in different positions on the mother plant after burial in soil under natural environmental conditions. Here, diaspores from three positions on a compound spike and seeds from two/three positions in a diaspore of the invasive diaspore-heteromorphic annual grass Aegilops tauschii were buried at four depths for more than 2 years (1-26 months) under natural conditions and viability and germination monitored monthly. Viability of seeds in each diaspore/seed position decreased as burial depth and duration increased and was associated with changes in soil temperature and moisture. Germination was highest at 2 cm and lowest at 10 cm soil depths, with peaks and valleys in autumn/spring and winter/summer, respectively. Overall, seeds in distal diaspore and distal seed positions had higher germination percentages than those in basal diaspore and basal seed positions, but basal ones lived longer than distal ones. Chemical content of fresh diaspores/seeds was related to diaspore/seed position effects on seed germination and viability during burial. We conclude that seeds in distal diaspores/seed positions have a 'high risk' strategy and those in basal positions a 'low risk' strategy. The two risk strategies may act as a bet-hedging strategy that spreads risks of germination failure in the soil seed bank over time, thereby facilitating the survival and invasiveness of A. tauschii.
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001233380200001
来源期刊	PHYSIOLOGIA PLANTARUM
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299986
作者单位	Henan University; University of Kentucky; University of Kentucky
推荐引用方式 GB/T 7714	Wang, Ai Bo,Baskin, Carol C.,Baskin, Jerry M.,et al. Environmental and seed-position effects on viability and germination of buried seeds of an invasive diaspore-heteromorphic annual grass[J],2024,176(3).
APA	Wang, Ai Bo,Baskin, Carol C.,Baskin, Jerry M.,&Ding, Jianqing.(2024).Environmental and seed-position effects on viability and germination of buried seeds of an invasive diaspore-heteromorphic annual grass.PHYSIOLOGIA PLANTARUM,176(3).
MLA	Wang, Ai Bo,et al."Environmental and seed-position effects on viability and germination of buried seeds of an invasive diaspore-heteromorphic annual grass".PHYSIOLOGIA PLANTARUM 176.3(2024).