禾苗专利菌种 解决农业种植难题丨一种大洋芽孢杆菌HMF-13及其应用(耐盐碱 防软腐)

1.耐盐碱+促生长机制

· 产生生长素、赤霉素等植物生长调节剂，促进根系发育和植株细胞分裂;活化土壤中被固定的氮、磷、钾等养分，提升作物对养分的吸收效率，进而促进植株健壮生长。

2.防控软腐病的核心途径

· 拮抗作用:分泌抗菌蛋白、脂肽类物质，直接抑制软腐病菌(欧文氏菌)的菌体繁殖和毒素产生，破坏病菌侵染结构。

· 空间竞争:快速在植物根际和体表形成优势菌群，抢占软腐病菌的生存位点，阻止病菌附着和侵入植物组织。

· 诱导抗病性:激发植物体内防御酶(如过氧化物酶、多酚氧化酶)活性，增强作物自身对软腐病的抵抗能力。

1. Mechanisms of Saline-Alkali Tolerance and Plant Growth Promotion

- The strain can secrete organic acids and exopolysaccharides, reduce the pH value of saline-alkali soil, improve soil aggregate structure, and alleviate the toxic effect of sodium ions on plant roots. It also regulates intracellular osmotic pressure, enabling stable colonization in highly saline-alkaline environments.

- It produces plant growth regulators such as auxin and gibberellin to promote root development and plant cell division. It activates immobilized nutrients including nitrogen, phosphorus and potassium in soil, improves nutrient uptake efficiency of crops, and thereby promotes robust plant growth.

2. Core Pathways for Controlling Soft Rot Disease

- Antagonism: Secretes antimicrobial proteins and lipopeptides, which directly inhibit the proliferation and toxin production of Erwinia (soft rot pathogen) and destroy the pathogen’s infection structure.

- Spatial competition: Rapidly forms a dominant flora in the rhizosphere and on the plant surface, occupies the ecological niches of soft rot pathogens, and prevents pathogen adhesion and invasion into plant tissues.

- Induced resistance: Stimulates the activities of plant defense enzymes (e.g., peroxidase, polyphenol oxidase), enhancing the crop’s inherent resistance to soft rot disease.