干旱区生态环境知识资源中心(Arid): Physiological Exploration of Intra-Specific Variability in Salinity Tolerance of Amaranth

Arid

DOI	10.1134/S1021443722030153
	Physiological Exploration of Intra-Specific Variability in Salinity Tolerance of Amaranth
	Tebini, M.; Luu, D. T.; Mguis, K.; Ben Ahmed, H.; Meddich, A.; Zribi, F.; Chalh, A.
通讯作者	Tebini, M
来源期刊	RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
ISSN	1021-4437
EISSN	1608-3407
出版年	2022
卷号	69 期号:3
英文摘要	Soil salinity is one of the most significant environmental problems that negatively affect crop growth and productivity due to the high concentration of sodium (Na+) ions in agricultural lands. Amaranth (Amaranthus caudatus L.) has been proposed as a robust alternative to traditional cereal crops in areas likely to be affected by increased salinity in the future. This work investigates the physiological and biochemical responses of three genotypes of amaranth ('Red', 'Green' and 'Pony' genotypes) to different gradual levels of salinity (100 and 200 mM). It was shown that a treatment with 100 mM NaCl improved significantly leaf and root dry biomass with maintenance of water contentparticularly 'Green' present the best dry biomass. The net CO2 assimilation rate (P-N), stomatal conductivity (g(s)), transpiration rate (E) and water use efficiency (WUE) decreased significantly with the intensity of saline stress. By the same, intercellular concentration of CO2 decreased in 'Red' and 'Pony' genotypes while it increased in 'Green' genotype. Therefore, salt tolerance in amaranth is strongly linked to ion homeostasis with an ability to accumulate Na+ in the stems to protect the leaves and to keep a high K+/Na+ ratio in the leaves. A significant increase in antioxidant enzyme activity; catalase (CAT), ascorbate peroxidase (APX) and guaiacol peroxidase (GPOX) in leaves and roots and an accumulation of proline were noticed. Amaranth may then be considered as a promising crop in arid and semi-arid regions affected by salinity.
英文关键词	Amaranthus caudatus salinity growth photosynthesis rate stomatal conductance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000799416100011
WOS关键词	OSMOTIC ADJUSTMENT ; GLYCINE BETAINE ; DEFENSE SYSTEM ; SALT TOLERANCE ; METABOLISM ; STRESS ; EFFICIENCY ; RESPONSES ; PROLINE ; GROWTH
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394328
推荐引用方式 GB/T 7714	Tebini, M.,Luu, D. T.,Mguis, K.,et al. Physiological Exploration of Intra-Specific Variability in Salinity Tolerance of Amaranth[J],2022,69(3).
APA	Tebini, M..,Luu, D. T..,Mguis, K..,Ben Ahmed, H..,Meddich, A..,...&Chalh, A..(2022).Physiological Exploration of Intra-Specific Variability in Salinity Tolerance of Amaranth.RUSSIAN JOURNAL OF PLANT PHYSIOLOGY,69(3).
MLA	Tebini, M.,et al."Physiological Exploration of Intra-Specific Variability in Salinity Tolerance of Amaranth".RUSSIAN JOURNAL OF PLANT PHYSIOLOGY 69.3(2022).