Saline-alkali tolerant strain capable of producing IAA and application thereof

By developing the salt-alkali-resistant Bacillus atrophy HHQGTS13-1 strain, the problem that existing salt-alkali-resistant microorganisms cannot produce indole acetic acid is solved, and the effect of promoting plant growth and inhibiting pathogens in a saline-alkali environment is achieved, and the growth performance and salt stress resistance of the plant are improved.

CN120349910APending Publication Date: 2025-07-22NANNING HARWORLD BIOLOGICAL TECH CORP
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Patent Information

Application Number
CN202410598523.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-05-15
Publication Date
2025-07-22

AI Technical Summary

Technical Problem

The existing saline-alkali-resistant microorganisms cannot produce indole acetic acid, which limits its application scope in the agricultural field. Saline-alkali stress is harmful to plant growth, resulting in inhibition of plant growth and even death.

Method used

A Bacillus atrophaeus strain HHQGTS13-1, which is salt-tolerant and can produce IAA, can grow in high salt and high pH environments, and produce indole acetate, cellulase, amylase, protease, and ligninase, which has a strong ability to inhibit plant pathogens.

Benefits of technology

This strain promotes plant growth in a saline-alkali environment, improves the resistance of plants to salt stress, significantly enhances stem length, root length, fresh weight and dry weight, and effectively inhibits a variety of plant pathogens, especially in the prevention and treatment of wheat gibberellosis and banana anthrax.

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Abstract

The invention discloses and relates to a strain capable of resisting saline and alkaline and producing IAA (Indoleacetic Acid). The strain is classified and named as bacillus atrophaeus, and the preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) NO.29799. The strain is preserved in China General Microbiological Culture Collection Center on January 29, 2024. The bacillus atrophaeus HHQGTS13-1 can grow under the condition that the salt content is higher than 3%, can generate indoleacetic acid, cellulase, amylase, protease and ligninase, can inhibit various plant pathogenic bacteria, such as banana anthracnose, tomato gray mold, cotton verticillium wilt, rice sheath blight disease, wheat head blight, banana fusarium wilt, capsicum white spot and the like, and can be used for preparing the bacillus atrophaeus HHQGTS13-1. Particularly, the compound plays an important role in preventing and treating wheat scab, banana anthracnose and capsicum white spot. The strain can promote plant growth in a saline-alkali environment, and can be used for improving soil quality, developing special microbial fertilizers, microbial agents and biopesticides for saline-alkali soil, relieving crop salt stress damage and increasing crop yield.
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