干旱区生态环境知识资源中心(Arid): Patterns of intraspecific trait variation along an aridity gradient suggest both drought escape and drought tolerance strategies in an invasive herb

Arid

DOI	10.1093/aob/mcaa173
	Patterns of intraspecific trait variation along an aridity gradient suggest both drought escape and drought tolerance strategies in an invasive herb
	Welles, Shana R.; Funk, Jennifer L.
通讯作者	Welles, SR (corresponding author), Chapman Univ, Schmid Coll Sci & Technol, Orange, CA 92866 USA.
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2021
卷号	127 期号:4 页码:461-471
英文摘要	Background and Aims In water-limited landscapes, some plants build structures that enable them to survive with minimal water (drought resistance). Instead of making structures that allow survival through times of water limitation, annual plants may invoke a drought escape strategy where they complete growth and reproduction when water is available. Drought escape and resistance each require a unique combination of traits and therefore plants are likely to have a suite of trait values that are consistent with a single drought response strategy. In environments where conditions are variable, plants may additionally evolve phenotypically plastic trait responses to water availability. Invasive annual species commonly occur in arid and semi-arid environments and many will be subject to reduced water availability associated with climate change. Assessing intraspecific trait variation across environmental gradients is a valuable tool for understanding how invasive plants establish and persist in arid environments. Methods In this study, we used a common garden experiment with two levels of water availability to determine how traits related to carbon assimilation, water use, biomass allocation and flowering phenology vary in California wild radish populations across an aridity gradient. Key Results We found that populations from arid environments have rapid flowering and increased allocation to root biomass, traits associated with both drought escape and tolerance. Early flowering was associated with higher leaf nitrogen concentration and lower leaf mass per area, traits associated with high resource acquisition. While trait values varied across low- and high-water treatments, these shifts were consistent across populations, indicating no differential plasticity across the aridity gradient. Conclusions While previous studies have suggested that drought escape and drought resistance are mutually exclusive drought response strategies, our findings suggest that invasive annuals may employ both strategies to succeed in novel semi-arid environments. As many regions are expected to become more arid in the future, investigations of intraspecific trait variation within low water environments help to inform our understanding of potential evolutionary responses to increased aridity in invasive species.
英文关键词	Drought escape drought resistance California wild radish Raphanus common garden functional traits leaf economics biomass allocation intraspecific trait variation
类型	Article
语种	英语
开放获取类型	Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000646244400007
WOS关键词	RADISH RAPHANUS-SATIVUS ; CALIFORNIA WILD RADISH ; WATER-USE EFFICIENCY ; ANNUAL PLANT ; CLIMATE-CHANGE ; PHENOTYPIC PLASTICITY ; POPULATION DIFFERENTIATION ; EVOLUTIONARY RESPONSES ; ARABIDOPSIS-THALIANA ; GENETIC CORRELATIONS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	University of California, Davis
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367922
作者单位	[Welles, Shana R.; Funk, Jennifer L.] Chapman Univ, Schmid Coll Sci & Technol, Orange, CA 92866 USA; [Funk, Jennifer L.] Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA
推荐引用方式 GB/T 7714	Welles, Shana R.,Funk, Jennifer L.. Patterns of intraspecific trait variation along an aridity gradient suggest both drought escape and drought tolerance strategies in an invasive herb[J]. University of California, Davis,2021,127(4):461-471.
APA	Welles, Shana R.,&Funk, Jennifer L..(2021).Patterns of intraspecific trait variation along an aridity gradient suggest both drought escape and drought tolerance strategies in an invasive herb.ANNALS OF BOTANY,127(4),461-471.
MLA	Welles, Shana R.,et al."Patterns of intraspecific trait variation along an aridity gradient suggest both drought escape and drought tolerance strategies in an invasive herb".ANNALS OF BOTANY 127.4(2021):461-471.