在干旱压力下产生的微生物生物刺激剂调节了Arachis hypogaea L.在干旱压力下的生长
Sakthi Uma Devi Eswaran1, Lalitha Sundaram1, Kahkashan Perveen2
1Soil Biology and PGPR Lab, Department of Botany, Periyar University, Salem, 636011, India.
BMC microbiology
|May 14, 2024
概括
微生物生物刺激剂,特别是Acinetobacter calcoaceticus AC06和Bacillus amyloliquefaciens BA01,通过产生氧化物和改善植物应激指标,提高了花生对干旱的耐受性. 这些促进植物生长的草原细菌 (PGPR) 为改善水资源稀缺条件下的作物生产率提供了可持续的解决方案.
科学领域:
- 农业科学 农业科学
- 微生物学 微生物学
- 植物生理学 植物生理学
背景情况:
- 干旱压力对全球作物生产率构成重大威胁,影响粮食安全.
- 微生物生物刺激剂,特别是促进植物生长的草原菌 (PGPR),提供了一种可持续的方法来增强作物弹性.
- 开发耐旱作物对于满足日益增长的全球人口需求至关重要.
研究的目的:
- 研究PGPR在减轻油作物干旱压力的作用.
- 识别和描述具有耐旱性和促进植物生长属性的PGPR菌株.
- 评估选择的PGPR菌株在干旱条件下改善花生性能方面的有效性.
主要方法:
- 对15种细菌分离物进行了干旱耐受性和植物生长促进 (PGP) 属性的选.
- 鉴定出两种强大的PGPR菌株:Acinetobacter calcoaceticus AC06和Bacillus amyloliquefaciens BA01.01,它们分别为
- 在不同干旱压力水平 (60%和40%的田间容量) 下,用AC06和BA01注射了接种的花生植物,并评估了生理和生化参数.
主要成果:
- 在透应激下,AC06和BA01产生了大量的透酸 (proline,酸,三糖,糖氨酸,贝他因).
- 用AC06和BA01注射改善了干旱期间的花生生长,生物质,光合作用颜料和相对水含量.
- PGPR注射降低了植物敏感性指标 (电解质泄漏,MDA) 和增强了抗氧化酶活性 (CAT,APX,SOD),赋予了干旱耐受性.
结论:
- 这种细菌是Acinetobacter sp. 在AC06和Bacillus sp.中. BA01作为有效的微生物生物刺激剂,产生溶体.
- 这些PGPR菌株在干旱压力下诱导了透耐受性和有益的代谢变化.
- 该研究强调了PGPR在水资源有限的环境中实现可持续农业的潜力.
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