Journal ArticleDOI
Effect of phytohormone pretreatment on nitrogen metabolism in Vigna radiata under salt stress
N. Chakrabarti,S. Mukherji +1 more
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TLDR
The pretreatment with indole-3-acetic acid, gibberellic acid and kinetin, each ranging from 0.1 to 10 µM, in restoring the metabolic alterations imposed by NaCl salinity was investigated in mung bean and the three phytohormones used were able to overcome to variable extents the adverse effects of stress imposed byNaCl solution.Abstract:
Application of NaCl (electrical conductivity 4.0 mS cm−1) resulted in about 52, 50 and 55 % reduction in total nitrogen contents in mung bean [Vigna radiata (L.) Wilczek] leaf, root and nodule, respectively. In nodule, nitrogenase activity was reduced by about 84 % under stress as compared with the control set. Glutamine synthetase activity was reduced by about 31, 16 and 23 %, glutamate oxoglutarate aminotransferase activity was reduced by 78, 57 and 42 % and glutamate dehydrogenase activity was reduced by 9, 8 and 42 % in leaf, root and nodule, respectively, under salt stress. The pretreatment with indole-3-acetic acid, gibberellic acid and kinetin, each ranging from 0.1 to 10 µM, in restoring the metabolic alterations imposed by NaCl salinity was investigated in mung bean. The three phytohormones used were able to overcome to variable extents the adverse effects of stress imposed by NaCl solution.read more
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Journal ArticleDOI
Beneficial effects of silicon on salt and drought tolerance in plants
Yongxing Zhu,Haijun Gong +1 more
TL;DR: In this paper, the authors review recent advances on silicon uptake, transport, and accumulation in plants and how silicon alleviates salinity toxicity and drought stress, and the major points are the following: (1) both passive and active silicon uptake may coexist in plants; (2) although silicon transporters have been identified in some plants, the process of silicon transport needs further clarification; (3) the mechanisms for silicon-mediated tolerance of salinity and drought have been extensively investigated at both physiological and biochemical levels.
Journal ArticleDOI
Salinity and its effects on the functional biology of legumes
Geetanjali Manchanda,Neera Garg +1 more
TL;DR: Legumes are a key component of sustainable agriculture and can offer many economic and environmental benefits if grown more widely in crop rotations because of their ability to fix nitrogen in the root nodules in a symbiotic interaction with soil rhizobia.
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Silicon (Si): Review and future prospects on the action mechanisms in alleviating biotic and abiotic stresses in plants.
TL;DR: The use of Si (mostly as industrial slags and rice straw) is predicted to become a sustainable strategy and an emerging trend in agriculture to enhance crop growth and alleviate abiotic and biotic stresses in the not too distant future.
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Causes of salinity and plant manifestations to salt stress: a review.
TL;DR: The present review underlines the different sources of salinity stress and their physiological manifestations, toxicity responses alongwith tolerance in plants and management strategies in affected landscapes.
Book ChapterDOI
Crop Plant Hormones and Environmental Stress
Shah Fahad,Lixiao Nie,Yutiao Chen,Chao Wu,Dongliang Xiong,Shah Saud,Liu Hongyan,Kehui Cui,Jianliang Huang +8 more
TL;DR: In this paper, the authors reviewed the role of hormones against abiotic tolerance in crop plants and found that abscisic acid act as a mediator in plant responses to many stresses, including salt stress.
References
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Journal ArticleDOI
The Acetylene-Ethylene Assay for N2 Fixation: Laboratory and Field Evaluation
TL;DR: This assay was successfully applied to measurements of N(2) fixation by other symbionts and by free living soil microorganisms, and was also used to assess the effects of light and temperature on the N( 2) fixing activity of soybeans.
Journal ArticleDOI
Alternative route for nitrogen assimilation in higher plants.
Peter J. Lea,Benjamin J. Miflin +1 more
TL;DR: It is generally considered that glutamate dehydrogenase is the enzyme that is chiefly responsible for the incorporation of nitrogen into the α-amino group of amino acids in the leaves of higher plants, but this is suggested not to be the case.
Journal ArticleDOI
Nitrogen fixation (C2H2 reduction) by Medicago nodules and bacteroids under sodium chloride stress
TL;DR: The nitrogen fixation capacity of the M. ciliaris-Rhizobium meliloti (ABS7) symbiosis under saline conditions leads us to recommend the introduction of this association in salt-troubled areas.
Book ChapterDOI
[44] Glutamine synthesis: Glutamic Acid+ATP+Ammonia→Glutamine +ADP+Phosphate
TL;DR: In this article, the authors used a modified version of the method described by Lipmann and Turtle to estimate the hydroxamic acid (GHA) produced by the enzyme when ammonia is replaced by hydroxylamine.