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Alleviation of cold stress in inoculated wheat (Triticum aestivum L.) seedlings with psychrotolerant Pseudomonads from NW Himalayas

Twelve psychrotolerant Pseudomonad strains were selected on the basis of various plant growth-promoting (PGP) activities at cold temperature (4°C). The effect of inoculation with Pseudomonad strains on cold alleviation and growth of wheat seedling at cold temperature (8°C) was investigated under gre...

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Published in:Archives of microbiology 2011-07, Vol.193 (7), p.497-513
Main Authors: Mishra, Pankaj Kumar, Bisht, Shekhar Chandra, Ruwari, Pooja, Selvakumar, Govindan, Joshi, Gopal Krishna, Bisht, Jaideep Kumar, Bhatt, Jagdish Chandra, Gupta, Hari Shankar
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description Twelve psychrotolerant Pseudomonad strains were selected on the basis of various plant growth-promoting (PGP) activities at cold temperature (4°C). The effect of inoculation with Pseudomonad strains on cold alleviation and growth of wheat seedling at cold temperature (8°C) was investigated under greenhouse condition. Inoculation with Pseudomonad strains significantly enhanced root/shoot biomass and nutrients uptake as compared to non-bacterized control at 60 days of plant growth. Bacterization significantly improved the level of cellular metabolites like chlorophyll, anthocyanin, free proline, total phenolics, starch content, physiologically available iron, proteins, and amino acids that are sign of alleviation of cold stress in wheat plants. Increased relative water content, reduced membrane injury (electrolyte leakage), and Na + /K + ratio were also recorded in bacterized wheat plants. Electrolyte leakage and Na + /K + were found inversely proportional to plant growth at cold temperature. Statistical analysis of twenty-three measured parameters revealed that uninoculated control was under cold stress while eight bacterial strains were positively alleviating cold stress in wheat plants. Thus, the psychrotrophic Pseudomonad strains could effectively provide a promising solution to overcome cold stress, which is major factor hindering wheat productivity under cold climatic condition.
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subjects Abiotic stress
Agricultural production
Agricultural research
Altitude
Amino acids
Anthocyanins - analysis
Bacteriology
Biochemistry
Biological and medical sciences
Biomass
Biomedical and Life Sciences
Biotechnology
Cell Biology
Chlorophyll - analysis
Climatic conditions
Cold Temperature
DNA, Bacterial - genetics
Ecology
Ecosystem
Electrolyte leakage
Electrolytes
Fundamental and applied biological sciences. Psychology
India
Iron - analysis
Life Sciences
Metabolites
Microbial Ecology
Microbiology
Microorganisms
Miscellaneous
Nutrient uptake
Original Paper
Phenols
Phylogeny
Physiology
Plant growth
Plant Roots - growth & development
Plant Roots - metabolism
Plant Roots - microbiology
Plant Shoots - growth & development
Plant Shoots - metabolism
Plant Shoots - microbiology
Productivity
Pseudomonas - genetics
Pseudomonas - isolation & purification
Pseudomonas - physiology
RNA, Ribosomal, 16S - genetics
Seedlings
Seedlings - drug effects
Seedlings - growth & development
Seedlings - metabolism
Sequence Analysis, DNA
Soil sciences
Starch - analysis
Statistical analysis
Stress, Physiological
Triticum - growth & development
Triticum - metabolism
Triticum - microbiology
Triticum aestivum
Water - metabolism
Water content
Wheat
title Alleviation of cold stress in inoculated wheat (Triticum aestivum L.) seedlings with psychrotolerant Pseudomonads from NW Himalayas
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