干旱区生态环境知识资源中心(Arid): Germination strategies of annual and short-lived perennial species in the Arabian Desert

Arid

DOI	10.1007/s40333-020-0023-8
	Germination strategies of annual and short-lived perennial species in the Arabian Desert
	Bhatt, Arvind; Gallacher, David J.; Souza-Filho, Paulo R. M.
通讯作者	Gallacher, DJ (corresponding author), Univ Sydney, Sch Life & Environm Sci, Narrabri, NSW 2390, Australia.
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2020
卷号	12 期号:6 页码:1071-1082
英文摘要	Germination timing is highly regulated in short-lived plant species since it strongly influences recruitment success of vegetation. In deserts, the spatiotemporal distribution of plant-available water is highly episodic and unpredictable, making winter months more favorable for seed germination when other abiotic conditions co-occur. We hypothesized that changes in photoperiod and thermoperiod would impact germination more in seeds that had undergone in situ storage. We assessed 21 annual and short-lived perennial species in the Arabian Desert to find (1) if seeds were dormant at maturity, (2) if in situ seed storage increased germination percentage compared with no storage, (3) if photoperiod and thermoperiod germination requirements were influenced by in situ storage, and (4) if a phylogenetic association in seed germination could be observed. Seeds of each species collected in early 2017 were divided into two batches. One was tested for germination within one week (fresh seeds). The other was stored in situ at the maternal location (stored seeds) until October 2017 and tested for seed germination in the first week of November. Seed germination was conducted in incubators at two thermoperiods (15 degrees C/20 degrees C and 20 degrees C/30 degrees C; 12 h/12 h), and two photoperiods (12 and 0 h light per day). Results indicated that seed germination percentages of 13 species were significantly enhanced by in situ storage. A thermoperiod response was exhibited by stored, but not fresh seeds. Light exposure increased germination of fresh seeds but had only a minimal effect on stored seeds. Germination traits exhibited no phylogenetic correlation. This result indicated that selection pressure for germination strategy was stronger than that for taxonomic traits of these desert species.
英文关键词	desert species dormancy germination light temperature phylogeny
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000613717600012
WOS关键词	SEED-GERMINATION ; TEMPERATURE REQUIREMENTS ; LIFE-HISTORY ; R PACKAGE ; DORMANCY ; LIGHT ; ARABIDOPSIS ; EVOLUTION ; SALINITY ; GRASSES
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348972
作者单位	[Bhatt, Arvind] Chinese Acad Sci, Lushan Bot Garden, Jiujiang 332900, Peoples R China; [Gallacher, David J.] Univ Sydney, Sch Life & Environm Sci, Narrabri, NSW 2390, Australia; [Souza-Filho, Paulo R. M.] Fed Univ Western Bahia, Multidisciplinary Ctr Barra, BR-47100000 Barra, Brazil
推荐引用方式 GB/T 7714	Bhatt, Arvind,Gallacher, David J.,Souza-Filho, Paulo R. M.. Germination strategies of annual and short-lived perennial species in the Arabian Desert[J],2020,12(6):1071-1082.
APA	Bhatt, Arvind,Gallacher, David J.,&Souza-Filho, Paulo R. M..(2020).Germination strategies of annual and short-lived perennial species in the Arabian Desert.JOURNAL OF ARID LAND,12(6),1071-1082.
MLA	Bhatt, Arvind,et al."Germination strategies of annual and short-lived perennial species in the Arabian Desert".JOURNAL OF ARID LAND 12.6(2020):1071-1082.