植物内生长促进来自两个半菌的细菌从盐应激下改善小麦的表现
Xuemin He1,2,3,4, Hongfei Yuan1, Yan Li1,2,3,4
1College of Ecology and Environment, Xinjiang University, Urumqi, China.
Frontiers in plant science
|February 12, 2026
概括
从沙漠植物中分离出来的植物生长促进内植物 (PGPE) 在盐压力下增强小麦生长. 这些细菌改善了发芽,生物质和叶绿素含量,同时减少了氧化应激酶.
科学领域:
- 微生物学 微生物学
- 植物科学 植物科学
- 农业科学 农业科学
背景情况:
- 来自植物的植物生长促进内植物 (PGPE) 为农业应用提供了潜力.
- 有限的研究存在于状植物的可培养微生物及其在作物盐压力抵抗中的作用.
研究的目的:
- 从沙漠植物 (Haloxylon ammodendron,Halostachys caspica) 中分离和描述内生菌.
- 评估它们的盐分耐受性和促进植物生长的能力.
- 评估它们在盐压力下改善小麦性能方面的有效性.
主要方法:
- 从菌根中分离内菌的细菌.
- 对NaCl和高pH的细菌耐受性的表征.
- 评估促进植物生长的特征 (IAA生产,酸盐溶解).
- 在盐应激下对小麦苗木生长,叶绿素含量和抗氧化酶活动的评估,使用PGPE注射.
主要成果:
- 已经发现了五种耐盐菌株:普里斯蒂亚内菌,P. licheniformis,Streptomyces griseorubens,Nocardiopsis aegyptia.
- 这些菌株对NaCl (1.4mol/L) 和性条件 (pH>11.0) 具有很高的耐受性.
- 在盐应激下,PGPE注射改善了小麦发芽,植物高度,根长,生物质和叶绿素含量.
- 在盐压小麦中,注射降低了氧化应激标志物 (SOD,POD,CAT).
结论:
- 素衍生的PGPE有效地改善小麦幼苗的盐应激.
- 这些PGPE菌株显示出在盐性土壤中提高农业生产力的巨大潜力.
- 鉴定到的细菌菌株是开发用于干旱和半干旱地区作物的生物注射剂的有希望的候选人.
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