干旱区生态环境知识资源中心(Arid): Lower dormancy with rapid germination is an important strategy for seeds in an arid zone with unpredictable rainfall

Arid

DOI	10.1371/journal.pone.0218421
	Lower dormancy with rapid germination is an important strategy for seeds in an arid zone with unpredictable rainfall
	Duncan, Corrine; Schultz, Nick; Lewandrowski, Wolfgang; Good, Megan K.; Cook, Simon
通讯作者	Duncan, C (corresponding author), Federat Univ, Sch Hlth & Life Sci, Mt Helen, Vic, Australia.
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2019
卷号	14 期号:9
英文摘要	Seed germination traits are key drivers of population dynamics, yet they are under-represented in community ecology studies, which have predominately focussed on adult plant and seed morphological traits. We studied the seed traits and germination strategy of eight woody plant species to investigate regeneration strategies in the arid zone of eastern Australia. To cope with stochastic and minimal rainfall, we predict that arid seeds will either have rapid germination across a wide range of temperatures, improved germination under cooler temperatures, or dormancy and/or longevity traits to delay or stagger germination across time. To understand how temperature affects germination responses, seeds of eight keystone arid species were germinated under laboratory conditions, and under three diurnal temperatures (30/20 degrees C, 25/15 degrees C and 17/7 degrees C) for 30 days. We also tested for decline in seed viability across 24 months in a dry-aging treatment (similar to 20 degrees C). Six of the eight arid species studied had non-dormant, rapidly germinating seeds, and only two species had physiological dormancy traits. Seed longevity differed widely between species, from one recalcitrant species surviving only months in aging (P50 = < 3 months) and one serotinous species surviving for many years (P50 = 84 months). Our results highlight the importance of understanding the reproductive strategies of plant species in arid environments. Rapid germination, the dominant seed trait of species included in this study, allows arid species to capitalise on sporadic rainfall. However, some species also exhibit dormancy and delayed germination; this an alternative strategy which spreads the risk of germination failure over time.
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000532172700003
WOS关键词	ANNUAL PLANTS ; EVOLUTIONARY ECOLOGY ; SOIL SEEDBANK ; TRAITS ; SIZE ; MASS ; DISPERSAL ; LONGEVITY ; BANK ; ESTABLISHMENT
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369814
作者单位	[Duncan, Corrine; Schultz, Nick; Cook, Simon] Federat Univ, Sch Hlth & Life Sci, Mt Helen, Vic, Australia; [Lewandrowski, Wolfgang] Dept Biodivers Conservat & Attract, Kings Pk Sci, Kings Pk, WA, Australia; [Lewandrowski, Wolfgang] Univ Western Australia, Sch Biol Sci, Crawley, WA, Australia; [Good, Megan K.] Univ Melbourne, Sch BioSci, Melbourne, Vic, Australia
推荐引用方式 GB/T 7714	Duncan, Corrine,Schultz, Nick,Lewandrowski, Wolfgang,et al. Lower dormancy with rapid germination is an important strategy for seeds in an arid zone with unpredictable rainfall[J]. University of Western Australia,2019,14(9).
APA	Duncan, Corrine,Schultz, Nick,Lewandrowski, Wolfgang,Good, Megan K.,&Cook, Simon.(2019).Lower dormancy with rapid germination is an important strategy for seeds in an arid zone with unpredictable rainfall.PLOS ONE,14(9).
MLA	Duncan, Corrine,et al."Lower dormancy with rapid germination is an important strategy for seeds in an arid zone with unpredictable rainfall".PLOS ONE 14.9(2019).