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Pak. J. Bot., 47(5): 1735-1741, 2015.

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  Updated: 20-10-15

 

 

IMPACT OF PLANT GROWTH PROMOTING BACILLUS SUBTILIS ON GROWTH  AND PHYSIOLOGICAL PARAMETERS OF BASSIA INDICA (INDIAN BASSIA) GROWN UDDER SALT STRESS

 

HASHEM ABEER1,2,5, ABD_ALLAH E. F.*3, ALQARAWI A. A.3, AL-HUQAIL ASMA A. 1,  ALSHALAWI S. R. M3,  WIRTH S.4 AND EGAMBERDIEVA DILFUZA4

 

Abstract: In this study, the role of a salt-tolerant plant growth-promoting bacterium (PGPR), Bacillus subtilis, in the alleviation of salinity stress during the growth of Indian bassia (Bassia indica [Wight] A.J. Scott), was studied under ccontrolled growth chamber conditions following seed inoculation. Physiological parameters such as neutral and phospholipids, fatty acid composition as well as photosynthetic pigments, were investigated. Salinity inhibited shoot and root length by 16 and 42%, dry weight by 37 and 23% respectively and negatively affected physiological parameters. Inoculation of unstressed and salt-stressed Indian bassia with B. subtilis significantly improved root and shoot growth, total lipid content, the phospholipid fraction, photosynthetic pigments (chlorophyll a and b and carotenoid contents)  and also increased oleic (C18:1), linoleic (C18:2) and linolenic (C18:3) acids in plant leaves compared to uninoculated plants. The salt-tolerant PGPR, B. subtilis could act synergistically to promote the growth and fitness of Indian bassia plants under salt stress by providing an additional supply of an auxin (IAA) and induce salt stress resistance by reducing stress ethylene levels.

 

Key words: Bassia indica, Salt stress, Bacillus subtilis, Photosynthetic pigments, Phospholipids, Auxin.

 


1Botany and Microbiology Department, Faculty of Science, King Saud University, P.O. Box. 2460 Riyadh 11451, Saudi. Arabia.

2Mycology and Plant Disease Survey Department, Plant Pathology Research Institute,  Agriculture Research Center, Giza, Egypt.

3Department of Plant Production, Faculty of Food & Agricultural Sciences, P.O. Box. 2460 Riyadh 11451, Saudi Arabia.

4Institute for Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research (ZALF),  15374 Müncheberg, Germany.

5Curret address: Botany and Microbiology Department, Faculty of Science, King Saud University,  Riyadh 11451, Saudi Arabia.

*Corresponding author: eabdallah@ksu.edu.sa


   
   

 

   
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