干旱区生态环境知识资源中心(Arid): Differential tolerance of native and invasive tree seedlings from arid African deserts to drought and shade

Arid

DOI	10.1016/j.sajb.2019.03.018
	Differential tolerance of native and invasive tree seedlings from arid African deserts to drought and shade
	Abbas, A. M.1,4; Rubio-Casal, A. E.2; De Cires, A.2; Grewell, B. J.3; Castillo, J. M.2
通讯作者	Castillo, J. M.
来源期刊	SOUTH AFRICAN JOURNAL OF BOTANY
ISSN	0254-6299
EISSN	1727-9321
出版年	2019
卷号	123 页码:228-240
英文摘要	Efforts to understand why some species become successful invaders and why some habitats are more at risk from invasive species is an important research focus in invasion ecology. With current global climate change, evaluation of the effects of shade and drought on cohabiting native and invasive species from extreme ecosystems is especially important. Acacia tortilis subsp. raddiana is a tree taxon native to arid African deserts. Prosopis glandulosa, native to the southwestern United States and Mexico, is invading African arid and semiarid regions that are habitat for A.t. subsp. raddiana. The aim of this study was to evaluate and compare the tolerance and responses of the seedlings of these two tree species to shade, water stress and their interactions. We measured and recorded growth rates and morphological, biochemical and physiological plant traits under two radiation and two water treatments in greenhouse conditions. Radiation intensity was a stronger driver of the performance of both species than water availability. Beyond the independent effects of shade and drought, the interactions of these factors yielded synergistic effects on seedlings of both tree species, affecting key plant traits. The seedlings of A.t. subsp. raddiana were able to implement important shifts in key functional traits in response to altering abiotic stress conditions, behaving as a stress-tolerant species that is well-adapted to the habitat it occupies in hot arid African deserts. In contrast, the fast-growing seedlings of P. glandulosa were stress-avoiding. The alien P. glandulosa seedlings were highly sensitive to water and shade stress. Moreover, they were particularly sensitive to drought in shade conditions. However, although alien P. glandulosa seedlings were exposed to high stress levels, they were able to avoid permanent damage to their photosynthetic apparatus by mechanisms such as increasing energy dissipation by heat emission and by adjusting the relative allocation of resources to above- and below-ground structures. Our results are useful for conservation planning and restoration of invaded hyperarid ecosystems. (C) 2019 SAAB. Published by Elsevier B.V. All rights reserved.
英文关键词	Acacia tortilis subsp. raddiana African desert Below-ground biomass Functional plant traits Hyperarid ecosystems Prosopis juliflora Prosopis glandulosa
类型	Article
语种	英语
国家	Saudi Arabia ; Spain ; USA ; Egypt
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000472017400027
WOS关键词	CHLOROPHYLL FLUORESCENCE ; PROSOPIS-JULIFLORA ; TAMARIX-CHINENSIS ; PLANT INVASIONS ; GAS-EXCHANGE ; LEAF-AREA ; PHOTOSYNTHESIS ; STRESS ; ACACIA ; GROWTH
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/2XILL650/218906
作者单位	1.King Khalid Univ, Dept Biol, Fac Sci, Abha 61413, Saudi Arabia; 2.Univ Seville, Dept Plant Biol & Ecol, Ave Reina Mercedes S-N, E-41012 Seville, Spain; 3.Univ Calif Davis, USDA ARS Invas Species & Pollinator Hlth Res Unit, Dept Plant Sci MS 4, Davis, CA 95616 USA; 4.South Valley Univ, Dept Bot & Microbiol, Fac Sci, Qena 83523, Egypt
推荐引用方式 GB/T 7714	Abbas, A. M.,Rubio-Casal, A. E.,De Cires, A.,et al. Differential tolerance of native and invasive tree seedlings from arid African deserts to drought and shade[J]. University of California, Davis,2019,123:228-240.
APA	Abbas, A. M.,Rubio-Casal, A. E.,De Cires, A.,Grewell, B. J.,&Castillo, J. M..(2019).Differential tolerance of native and invasive tree seedlings from arid African deserts to drought and shade.SOUTH AFRICAN JOURNAL OF BOTANY,123,228-240.
MLA	Abbas, A. M.,et al."Differential tolerance of native and invasive tree seedlings from arid African deserts to drought and shade".SOUTH AFRICAN JOURNAL OF BOTANY 123(2019):228-240.