干旱区生态环境知识资源中心(Arid): Different root strategies of perennial native grasses under two contrasting water availability conditions: implications for their spatial distribution in desert dunes

Arid

DOI	10.1007/s11258-020-01038-9
	Different root strategies of perennial native grasses under two contrasting water availability conditions: implications for their spatial distribution in desert dunes
	Vega Riveros, Cecilia; Villagra, Pablo E.; Greco, Silvina A.
通讯作者	Riveros, CV
来源期刊	PLANT ECOLOGY
ISSN	1385-0237
EISSN	1573-5052
出版年	2020
卷号	221 期号:7 页码:633-646
英文摘要	The distribution pattern of perennial native grasses in the dune systems of the Monte desert might be determined by the ability of plant roots to acquire water under drought conditions in different topographical positions and soil substrates. This study examined differences in root traits of two species growing in sand dunes,Aristida mendocinaandPanicum urvilleanum, and two species growing in interdune valleys,Pappophorum caespitosumandLeptochloa crinita, under different water availability conditions in a sand substrate. Grasses were grown in rhizotrons and the factorial design included species, irrigation treatments, days from sowing, and depth soil profile. Root length, total root length, number of root branches, length of root branches-to-number of root branches ratio (LB:NB), daily elongation rate (DER), root length density (RLD), root angles, aerial and root dry mass, and shoot-to-root ratio (S:R) were measured. The four species studied were affected by drought conditions causing a decrease in root growth and modifying root structure, partition of assimilates, root angles, and exploration of the soil profile. However, we found that species from sand dunes were less affected by drought and showed a deeper root exploration under drought conditions, mainly due to proliferation of longer and more lateral roots in the deepest soil layer. The different root traits and responses of the species under drought conditions would imply adaptations to the topographical position each species occupies and could explain their spatial distribution in desert dunes.
英文关键词	Adaptative root traits Monte desert Interspecific variability Water stress Soil exploration
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000540876100008
WOS关键词	CENTRAL MONTE DESERT ; GROWTH ANGLE ; PLANT ; SYSTEM ; DROUGHT ; ADAPTATIONS ; ELONGATION ; PLASTICITY ; EMERGENCE ; RESPONSES
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324781
作者单位	[Vega Riveros, Cecilia; Villagra, Pablo E.] Mendoza CONICET, Inst Argentino Nivol Glaciol & Ciencias Ambient I, Ctr Cient Tecnol CCT, Ave Ruiz Leal S-N,Parque Gen San Martin, RA-5500 Mendoza, Argentina; [Villagra, Pablo E.; Greco, Silvina A.] Univ Nacl Cuyo, Fac Ciencias Agr, Ave Almirante Brown 500, Mendoza, Argentina
推荐引用方式 GB/T 7714	Vega Riveros, Cecilia,Villagra, Pablo E.,Greco, Silvina A.. Different root strategies of perennial native grasses under two contrasting water availability conditions: implications for their spatial distribution in desert dunes[J],2020,221(7):633-646.
APA	Vega Riveros, Cecilia,Villagra, Pablo E.,&Greco, Silvina A..(2020).Different root strategies of perennial native grasses under two contrasting water availability conditions: implications for their spatial distribution in desert dunes.PLANT ECOLOGY,221(7),633-646.
MLA	Vega Riveros, Cecilia,et al."Different root strategies of perennial native grasses under two contrasting water availability conditions: implications for their spatial distribution in desert dunes".PLANT ECOLOGY 221.7(2020):633-646.