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Publication Type J
Authors Hajiabadi, A. A., A. M. Arani, S. Ghasemi, M. H. Rad, H. Etesami, S. S. Manshadi and A. Dolati
Title Mining the rhizosphere of halophytic rangeland plants for halotolerant bacteria to improve growth and yield of salinity-stressed wheat
Source Plant Physiology and Biochemistry
Author Keywords Atriplex lentiformis Bacillus Halostachys belangeriana Seed and forage quality Seidlitzia rosmarinus Zhihengliuella promoting rhizobacteria salt stress triticum-aestivum bacillus-subtilis acc deaminase tolerance soil l. biosynthesis degradation
Abstract In this study, the effects of three halotolerant rhizobacterial isolates AL, HR, and SB, which are able to grow at a salinity level of 1600 mM NaCl, with multiple plant growth promoting (PGP) traits on some seed and forage quality attributes, and vegetative, reproductive, biochemical and physiological characteristics of wheat plant irrigated with saline water (0, 40, 80, and 160 mM NaCl) were investigated. The ability of halotolerant bacterial isolates to produce PGP traits was affected by salinity levels, depending upon the bacterial isolates. Salinity stress significantly affected the yield, quality, and growth of wheat by modifying the morpho-physiological and biochemical traits of the exposed plants. However, all three bacterial isolates, especially isolate AL, significantly improved the biochemical (an increase in K+/Na+ ratio by 55%, plant P content by 50%, and plant Ca content by 31%), morphological (an increase in stem dry weight by 52%, root dry weight by 44%, spike dry weight by 34%, and grain dry weight by 43%), and physiological (an increase in leaf proline content by 50% and total phenol in leaf by 42%) attributes of wheat and aided the plant to tolerate salinity stress in contrast to un-inoculated plant. Plants inoculated with bacterial isolates showed significantly improved seed amylose by 36%, leaf crude protein by 30%, leaf metabolic energy by 37%, and leaf water-soluble sugar content by 34%. Among the measured PGP and plant attributes, bacterial auxin and plant K content were of key importance in increasing reproductive performance of wheat. The bacterial isolates AL, HR, and SB were identified as Bacillus safensis, B. pumilus, and Zhihengliuella halotolerans, respectively, based on 16 S rDNA sequence. The study reveals that application of halotolerant plant growth-promoting rhizobacteria isolated from halophytic rangeland plants can be a cost effective and ecological sustainable method to improve wheat productivity, especially the attributes related to seed and forage quality, under salinity stress conditions.
Author Address [Hajiabadi, Alireza Amini] Cent Off Nat Resources & Watershed Management, Yazd, Iran. [Arani, Asghar Mosleh] Yazd Univ, Fac Nat Resources, Dept Environm Sci, Yazd, Iran. [Ghasemi, Somayeh; Manshadi, Shima Shabazi] Yazd Univ, Fac Nat Resources, Dept Soil Sci, Yazd, Iran. [Rad, Mohammad Hadi] Yazd Agr & Nat Resource Res & Educ Ctr, Forest & Rangeland Div, Yazd, Iran. [Etesami, Hassan] Univ Tehran, Dept Soil Sci, Karaj, Iran. [Dolati, Ali] Yazd Univ, Fac Math, Dept Stat, Yazd, Iran. Arani, AM (corresponding author), Yazd Univ, Fac Nat Resources, Dept Environm Sci, Yazd, Iran.; Etesami, H (corresponding author), Univ Tehran, Dept Soil Sci, Karaj, Iran. amoleh@yazd.ac.ir; hassanetesami@ut.ac.ir
ISSN 0981-9428
ISBN 0981-9428
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date Jun
Year Published 2021
Volume 163
Beginning Page 139-153
Digital Object Identifier (DOI) 10.1016/j.plaphy.2021.03.059
Unique Article Identifier WOS:000648298300015

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