干旱区生态环境知识资源中心(Arid): Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress

Arid

DOI	10.3390/agronomy10030322
	Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress
	Luo, Yong-Zhong 1; Li, Guang 1; Yan, Guijun 2,3; Liu, Hui 2,3; Turner, Neil C.2,3
通讯作者	Li, Guang ; Turner, Neil C.
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2020
卷号	10 期号:3
英文摘要	Drought is one of the major abiotic stresses affecting the morphological, physiological, and metabolic processes of plants, and hence their growth and production on a global scale. Lucerne (Medicago sativa L.) is one of the most popular pasture species in semi-arid regions and plays a critical role in sustaining agricultural systems in many areas of the world. In order to evaluate the effect of water deficits on the growth and biomass distribution in different tissues of lucerne, plant height, leaf dry weight, leaf number and area, root dry weight, taproot length and lateral root number, and stem dry weight were measured at four stages from the seedling to flowering stages under three water regimes: (i) adequate water supply (minimum soil water content 85% pot capacity (PC)), (ii) moderate water stress (65% PC), and (iii) severe water stress (45% PC), imposed under a rainout shelter. With limited water supply, plant height, leaf number, leaf area and dry weight, taproot length, and total biomass were reduced, while lateral root numbers increased. The number of smaller leaves and root dry weight increased under moderate water stress, whereas severe water stress reduced them. Leaf, stem, and total dry weight were all reduced by the water deficits, but leaf dry weight was reduced the most and root dry weight the least, so there was a redistribution of biomass towards the roots, increasing the root-shoot ratio. These results help us to understand the response of lucerce to water stress and assist in developing a foundation for the sustainable use of lucerne in semi-arid agricultural systems.
英文关键词	alfalfa biomass lateral root number leaf growth plant height taproot length
类型	Article
语种	英语
国家	Peoples R China ; Australia
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000529377300008
WOS关键词	LOESS PLATEAU ; DROUGHT STRESS ; CLIMATE-CHANGE ; RESPONSES ; CAPACITY ; LEGUMES ; DEFICIT
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
来源机构	University of Western Australia
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318866
作者单位	1.Gansu Agr Univ, Coll Forestry, Lanzhou 730070, Peoples R China; 2.Univ Western Australia, UWA Sch Agr & Environm, Locked Bag 5005, Perth, WA 5005, Australia; 3.Univ Western Australia, UWA Inst Agr, Locked Bag 5005, Perth, WA 5005, Australia
推荐引用方式 GB/T 7714	Luo, Yong-Zhong,Li, Guang,Yan, Guijun,et al. Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress[J]. University of Western Australia,2020,10(3).
APA	Luo, Yong-Zhong,Li, Guang,Yan, Guijun,Liu, Hui,&Turner, Neil C..(2020).Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress.AGRONOMY-BASEL,10(3).
MLA	Luo, Yong-Zhong,et al."Morphological Features and Biomass Partitioning of Lucerne Plants (Medicago sativa L.) Subjected to Water Stress".AGRONOMY-BASEL 10.3(2020).