干旱区生态环境知识资源中心(Arid): Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche

Arid

DOI	10.1093/aob/mcab020
	Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche
	Oyanoghafo, Osazee O.; O' Brien, Corey; Choat, Brendan; Tissue, David; Rymer, Paul D.
通讯作者	Oyanoghafo, OO (corresponding author)，Western Sydney Univ, Hawkesbury Inst Environm, Richmond, NSW 2751, Australia. ; Oyanoghafo, OO (corresponding author)，Univ Benin, Fac Life Sci, Dept Plant Biol & Biotechnol, Benin, Nigeria.
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2021
卷号	127 期号:7
英文摘要	Background and Aims Extreme drought conditions across the globe are impacting biodiversity, with serious implications for the persistence of native species. However, quantitative data on physiological tolerance are not available for diverse flora to inform conservation management. We quantified physiological resistance to cavitation in the diverse Hakea genus (Proteaceae) to test predictions based on climatic origin, life history and functional traits. Methods We sampled terminal branches of replicate plants of 16 species in a common garden. Xylem cavitation was induced in branches under varying water potentials (tension) in a centrifuge, and the tension generating 50 % loss of conductivity (stem P-50) was characterized as a metric for cavitation resistance. The same branches were used to estimate plant functional traits, including wood density, specific leaf area and Huber value (sap flow area to leaf area ratio). Key Results There was significant variation in stem P-50 among species, which was negatively associated with the species climate origin (rainfall and aridity). Cavitation resistance did not differ among life histories; however, a drought avoidance strategy with terete leaf form and greater Huber value may be important for species to colonize and persist in the arid biome. Conclusions This study highlights climate (rainfall and aridity), rather than life history and functional traits, as the key predictor of variation in cavitation resistance (stem P-50). Rainfall for species origin was the best predictor of cavitation resistance, explaining variation in stem P-50, which appears to be a major determinant of species distribution. This study also indicates that stem P-50 is an adaptive trait, genetically determined, and hence reliable and robust for predicting species vulnerability to climate change. Our findings will contribute to future prediction of species vulnerability to drought and adaptive management under climate change.
英文关键词	Aridity climate change cavitation resistance life history functional traits Proteaceae
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000750854300008
WOS关键词	EUCALYPTUS-GLOBULUS ; WOOD DENSITY ; HYDRAULIC FAILURE ; WATER-STRESS ; FUNCTIONAL-RELATIONSHIPS ; EMBOLISM RESISTANCE ; PLANT VULNERABILITY ; TREE MORTALITY ; LEAF ; DROUGHT
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375958
作者单位	[Oyanoghafo, Osazee O.; O' Brien, Corey; Choat, Brendan; Tissue, David; Rymer, Paul D.] Western Sydney Univ, Hawkesbury Inst Environm, Richmond, NSW 2751, Australia; [Oyanoghafo, Osazee O.] Univ Benin, Fac Life Sci, Dept Plant Biol & Biotechnol, Benin, Nigeria
推荐引用方式 GB/T 7714	Oyanoghafo, Osazee O.,O' Brien, Corey,Choat, Brendan,et al. Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche[J],2021,127(7).
APA	Oyanoghafo, Osazee O.,O' Brien, Corey,Choat, Brendan,Tissue, David,&Rymer, Paul D..(2021).Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche.ANNALS OF BOTANY,127(7).
MLA	Oyanoghafo, Osazee O.,et al."Vulnerability to xylem cavitation of Hakea species (Proteaceae) from a range of biomes and life histories predicted by climatic niche".ANNALS OF BOTANY 127.7(2021).