干旱区生态环境知识资源中心(Arid): Climate of origin has no influence on drought adaptive traits and the drought responses of a widely distributed polymorphic shrub

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DOI	10.1093/treephys/tpab085
	Climate of origin has no influence on drought adaptive traits and the drought responses of a widely distributed polymorphic shrub
	Xu, Gui-Qing; Farrell, Claire; Arndt, Stefan K.
通讯作者	Arndt, SK (corresponding author)，Univ Melbourne, Sch Ecosyst & Forest Sci, 500 Yarra Blvd, Richmond, Vic 3121, Australia.
来源期刊	TREE PHYSIOLOGY
ISSN	0829-318X
EISSN	1758-4469
出版年	2022
卷号	42 期号:1
英文摘要	Climate has a significant influence on species distribution and the expression of functional traits in different plant species. However, it is unknown if subspecies with different climate envelopes also show differences in their expression of plant functional traits or if they respond differently to drought stress. We measured functional traits and drought responses of five subspecies of a widely distributed, cosmopolitan polymorphic shrub, Dodonaea viscosa (L.) Jacq., in an experiment with 1-year-old plants. Functional traits, such as leaf size, specific leaf area, turgor loss point (Psi(TLP)), maximum stomatal conductance and maximum plant hydraulic conductance, differed among the five subspecies. However, while the were some differences among traits, these were not related to their climate of origin, as measured by mean annual temperature, mean annual precipitation and mean annual aridity index. Drought response was also not related to climate of origin, and all subspecies showed a combination of drought avoiding and drought tolerance responses. All subspecies closed their stomata at very high water potentials (between -1.0 and -1.3 MPa) and had large hydraulic safety margins (drought avoidance). All subspecies adjusted their Psi(TLP) via osmotic adjustment, and subspecies with inherently lower Psi(TLP) showed greater osmotic adjustment (drought tolerance). All subspecies adjusted their midday water potentials in response to drought but subspecies from more arid environments did not show greater adjustments. The results indicated that climate niche was not related to plant trait expression or response to drought. The combination of drought avoidance and drought tolerance behavior seems to be a successful strategy for this widely distributed species that occupies many different climate zones and ecosystems. Hence, the wide distribution of D. viscosa seems to be related to plasticity of trait expression and drought response rather than long-term genetic adaptations to different environmental conditions.
英文关键词	Dodonaea viscosa hop bush hydraulic safety margin turgor loss point water relation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000745663100008
WOS关键词	TURGOR LOSS POINT ; HYDRAULIC ARCHITECTURE ; PHENOTYPIC PLASTICITY ; RAINFALL GRADIENT ; LEAF MORPHOLOGY ; WATER RELATIONS ; VARIABILITY ; DETERMINANTS ; CONVERGENCE ; POPULATIONS
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376962
作者单位	[Xu, Gui-Qing] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Xinjiang, Peoples R China; [Farrell, Claire; Arndt, Stefan K.] Univ Melbourne, Sch Ecosyst & Forest Sci, 500 Yarra Blvd, Richmond, Vic 3121, Australia
推荐引用方式 GB/T 7714	Xu, Gui-Qing,Farrell, Claire,Arndt, Stefan K.. Climate of origin has no influence on drought adaptive traits and the drought responses of a widely distributed polymorphic shrub[J],2022,42(1).
APA	Xu, Gui-Qing,Farrell, Claire,&Arndt, Stefan K..(2022).Climate of origin has no influence on drought adaptive traits and the drought responses of a widely distributed polymorphic shrub.TREE PHYSIOLOGY,42(1).
MLA	Xu, Gui-Qing,et al."Climate of origin has no influence on drought adaptive traits and the drought responses of a widely distributed polymorphic shrub".TREE PHYSIOLOGY 42.1(2022).