干旱区生态环境知识资源中心(Arid): Nitrogen fixation and carbon assimilation of the desert legume Tephrosia apollinea under PEG-induced osmotic stress

Arid

DOI	10.1016/j.flora.2019.01.004
	Nitrogen fixation and carbon assimilation of the desert legume Tephrosia apollinea under PEG-induced osmotic stress
	Hussain, M. Iftikhar 1; El-Keblawy, Ali 1,2; Aljabi, Alaa Emad 2; Aljabi, Duaa Emad 2; Hafez, Mohamad 2; Al Jasmi, Amira 2; Schampoel, Tim 3; Temperton, Vicky M.3
通讯作者	Hussain, M. Iftikhar
来源期刊	FLORA
ISSN	0367-2530
EISSN	1618-0585
出版年	2019
卷号	251 页码:105-113
英文摘要	Tephrosia apollinea (Leguminosae) is a desert legume shrub from UAE deserts and can fix atmospheric nitrogen through Rhizobium symbiosis. Uniform seedlings of T. apollinea were hydroponically grown in beakers (100 ml) covered with sink strainers in a growth chamber and subjected to different levels of polyethylene glycol (PEG) (0%, 5%, 10%, and 15%) treatment. Potential PEG-induced osmotic stress was evaluated through several plasticity traits such as plant biomass, root nodulation and viability of nodules, and stable isotopes of carbon (delta C-13) and nitrogen (delta N-15). Osmotic stress decreased plant fresh (FW) and dry biomass (DW), with the largest reduction being found at 15% PEG. Osmotic stress significantly decreased delta C-13 in both roots and leaves, but the reduction was more prominent in the roots. Conversely, osmotic stress significantly increased delta N-15 in both roots and leaves. We identified four different strains of nitrogen fixing bacteria (Rhizobium leguminosarum, R. radio-bacter, R. meliloti and Bradyrhizobium sp.) from root nodules forming a symbiotic association with T. apollinea. The overall results indicate that carbon allocation, root nodule activity, and carbon and nitrogen isotope signatures are useful functional attributes to measure in relation to adaptive survival of T. apollinea in arid deserts. In addition, the combination of ecophysiological and morphological plasticity in T. apollinea suggest it as an interesting biomass source and nurse plant in nutrient-poor soils of desert environments.
英文关键词	Carbon isotope discrimination Carbon allocation Plant biomass Stable isotopes Rhizobial symbiosis
类型	Article
语种	英语
国家	U Arab Emirates ; Germany
收录类别	SCI-E
WOS记录号	WOS:000457159500011
WOS关键词	WATER-USE EFFICIENCY ; ISOTOPE COMPOSITION ; STABLE CARBON ; SALINITY STRESS ; SONORAN DESERT ; GAS-EXCHANGE ; RESPIRED CO2 ; DURUM-WHEAT ; VICIA-FABA ; PLANTS
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215639
作者单位	1.Univ Sharjah, Res Inst Sci & Engn, POB 27272, Sharjah, U Arab Emirates; 2.Univ Sharjah, Dept Appl Biol, POB 27272, Sharjah, U Arab Emirates; 3.Leuphana Univ, Inst Ecol, Chair Ecosyst Functioning & Serv, Luneburg, Germany
推荐引用方式 GB/T 7714	Hussain, M. Iftikhar,El-Keblawy, Ali,Aljabi, Alaa Emad,et al. Nitrogen fixation and carbon assimilation of the desert legume Tephrosia apollinea under PEG-induced osmotic stress[J],2019,251:105-113.
APA	Hussain, M. Iftikhar.,El-Keblawy, Ali.,Aljabi, Alaa Emad.,Aljabi, Duaa Emad.,Hafez, Mohamad.,...&Temperton, Vicky M..(2019).Nitrogen fixation and carbon assimilation of the desert legume Tephrosia apollinea under PEG-induced osmotic stress.FLORA,251,105-113.
MLA	Hussain, M. Iftikhar,et al."Nitrogen fixation and carbon assimilation of the desert legume Tephrosia apollinea under PEG-induced osmotic stress".FLORA 251(2019):105-113.