Alleviation of the effect of environmental stresses using co-inoculation of mungbean by Bradyrhizobium and rhizobacteria containing stress-induced ACC deaminase enzyme(Soil biology)

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概要

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• Ethylene is synthesized at accelerated rate in response to stress conditions, and regarded as a stress hormone that inhibits overall plant growth. Apparently, the amount of ethylene can be reduced by using silver thiosulfate (STS) or bacteria containing 1-amino-cyclopropane-l-carboxylate (ACC) deaminase. In this study, we examined whether different concentrations of STS differently prevent legume growth under various environment stress conditions, and whether co-inoculation of mungbean (Vigna radiata (L.) R. Wilczek) by Bradyrhizobium and rhizobacteria containing ACC deaminase also alleviates legume stress. Mungbean is one of the most responsive plants among tested legume species, and different varieties of mungbean also respond differently to STS. Stress conditions and inappropriate concentrations of STS affect plant growth and symbiosis, while a suitable concentration of STS supports plant growth under stress conditions. Three isolates of bacteria containing ACC deaminase, Enterobacter sp. ACC1, Enterobacter sp. ACC2, and Chryseobacterium sp. ACC3, were selected according to their ACC deaminase activity and resistance abilities to high temperature, drought, and salt stress conditions. Interestingly, the gene encoding ACC deaminase, acdS, of selected ACC deaminase bacteria was highly induced when the cell culture was exposed to stress conditions. It coincided with co-inoculation of plants by Bradyrhizobium and rhizobacteria containing ACC deaminase. This co-inoculation obviously alleviated the stress of plants growing under stress conditions. These results revealed the role of bacteria containing ACC deaminase that can adjust its expression of ACC deaminase to different levels of stress conditions, which will be useful in agriculture under global warming.

• 一般社団法人日本土壌肥料学会の論文

著者

• Teaumroong Neung

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• Boonkerd Nantakorn

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• Tittabutr Panlada

  School Of Biotechnology Institute Of Agricultural Technology Suranaree University Of Technology

• PIROMYOU Pongdet

  School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology

• LONGTONGLANG Aphakorn

  School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology

• NOISA-NGIAM Rujirek

  School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology

関連論文

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• Effect of Rice Cultivation Systems on Indigenous Arbuscular Mycorrhizal Fungal Community Structure
• Alleviation of the effect of environmental stresses using co-inoculation of mungbean by Bradyrhizobium and rhizobacteria containing stress-induced ACC deaminase enzyme(Soil biology)

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