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KMID : 0364820140500040368
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Korean Journal of Microbiology
2014 Volume.50 No. 4 p.368 ~ p.371
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Pseudomonas sp. G19 Alleviates Salt Stress and Promotes Growth of Chinese Cabbage
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Lee Gun-Woong
Lee Kui-Jae
Chae Jong-Chan
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Abstract
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A variety of abiotic stresses limit plant growth and crop productivity. Among the abiotic stress, salinity is one of the
major harmful stresses to plants. Plant growth-promoting bacterium was isolated from reclaimed land soil of
Kyehwa-do and identified as Pseudomonas. Pseudomonas sp. strain G19 produced 7.5 μg/ml of indole acetic acid
and solubilized 25% of insoluble phosphate after 36 h cultivation. Also, G19 was able to produce a protein that was
structurally homologous to 1-aminocyclopropane-1-carboxylate deaminase of Pseudomonas fluorescens KACC10070
playing a role in reduction of ethylene in plant. The strain G19 increased the biomass of Chinese cabbage seedlings
grown in the presence of 150 mM NaCl. The results indicated that the strain G19 promoted the growth of Chinese
cabbage seedling under salinity stress through microbe-plant interactions.
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KEYWORD
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Pseudomonas, Chinese cabbage, plant-growth promotion, salinity stress
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