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在Brachiaria中探索ACC脱氨酶生产细菌以减轻干旱压力

Jéssica P Ferreira¹, Márcia S Vidal², José I Baldani²

¹Department of Crop Sciences, Crop Sciences Graduate Program, Federal Rural University of Rio de Janeiro (UFRRJ), Institute of Agronomy, Seropédica, Rio de Janeiro, Brazil.

Frontiers in plant science

|September 4, 2025

概括

具有ACC除氨酶活性的促进植物生长的细菌可以增强作物的弹性. 这项研究确定了减轻Brachiaria植物缺水压力的特定细菌菌株,在干旱条件下促进生长.

科学领域:

微生物学
植物科学
农业学

背景情况:

促进植物生长的细菌 (PGPB) 增强了植物的生长.
在 PGPB 中的 ACC 脱氨酶活性有助于应激耐受.
布拉基亚基因型是面临干旱等环境挑战的重要作物.

研究的目的:

确定具有ACC除氨酶活性的细菌菌株.
评估它们在Brachiaria减轻缺水压力的潜力.
评估它们在压力下促进植物生长的能力.

主要方法:

对213种细菌分离物进行ACC除氨酶活性和acdS基因存在的查.
使用PEG 8000进行体外对缺水压力的耐受性评估.
通过共聚焦显微镜评估植物生长促进 (高度,生物量) 和根植殖.

主要成果:

在213个菌株中,有17个显示出ACC除氨酶活性,其中9个证实了acdS基因.
在模拟干旱的情况下,NRB142,NRB223和BR11790菌株显著促进了Brachiaria的生长.
通过NRB142菌株对Brachiaria根的内生植被得到证实.

结论:

特定的ACC脱氨酶产生细菌可以有效地减轻Brachiaria的缺水压力.
这些细菌显示出在干旱下增强植物性和作物生产力的潜力.
细菌注射是改善料质量和产量的有希望的可持续策略.

关键词:

1-氨基cyclopropane-1-碳酸的使用乙烯应力接种疫苗 mCherry 记者基因一个牧场植物殖民促进植物生长的细菌聚乙烯糖

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