首页|期刊导航|干旱区研究|干旱胁迫下枯草芽孢杆菌对沙打旺和羊柴幼苗抗氧化能力的影响

干旱胁迫下枯草芽孢杆菌对沙打旺和羊柴幼苗抗氧化能力的影响

PENG Lixue WU Weiting GAO Guanglei DING Guodong ZHANG Ying

干旱区研究2025，Vol.42Issue(12)：2256-2267,12.

干旱区研究2025，Vol.42Issue(12)：2256-2267,12.DOI:10.13866/j.azr.2025.12.09

干旱胁迫下枯草芽孢杆菌对沙打旺和羊柴幼苗抗氧化能力的影响

Effects of Bacillus subtilis on antioxidant capacity of Astragalus laxmannii and Corethrodendron fruticosum seedlings under drought stress

PENG Lixue ¹WU Weiting ¹GAO Guanglei ²DING Guodong ³ZHANG Ying³

作者信息

1. School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China
2. School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China||State Key Laboratory of Efficient Production of Forest Resources,Beijing 100083,China||Yanchi Ecology Research Station of the Mu Us Desert,Yanchi 751500,Ningxia,China||Engineering Research Center of Forestry Ecological Engineering,Ministry of Education,Beijing 100083,China||Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation,Beijing 100083,China
3. School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China||Yanchi Ecology Research Station of the Mu Us Desert,Yanchi 751500,Ningxia,China||Engineering Research Center of Forestry Ecological Engineering,Ministry of Education,Beijing 100083,China||Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation,Beijing 100083,China
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摘要

Abstract

Drought is a major obstacle to ecological restoration and aeolian erosion control in China's Three-North Regions.Bacillus subtilis demonstrates plant growth-promoting properties and robust environmental adapt-ability,yet its regulatory mechanisms underlying stress resistance in psammophytes remain unclear.This study comparatively analyzes variations in aeolian soil properties,seedling root morphology,and antioxidant capacity under differential drought gradients(no,mild,or moderate stress)and bacterial inoculant concentrations(0,1,5,or 9 g·kg-1)by conducting controlled pot experiments on Astragalus laxmannii and Corethrodendron fruticosum.The key findings were as follows.(1)B.subtilis significantly enhanced soil organic carbon content,total nitrogen content,and root morphological traits(P<0.05)without elevating soil pH(P>0.05).(2)Under drought stress,B.subtilis augmented seedling antioxidant capacity through elevated antioxidant enzyme activities(P<0.05).Under mild drought stress,the optimal inoculant concentrations for enhancing antioxidant capacity were 5 g·kg-1 for A.laxmannii and 9 g·kg-1 for C.fruticosum.Under moderate drought stress,9 g·kg-1 of inoculant was optimal for both species.(3)Drought indirectly suppressed antioxidant capacity through soil nutrient depletion(P<0.01),whereas B.subtilisalleviated oxidative damage through antioxidant enzyme activation(P<0.05).Through species-specific quantification of response thresholds across drought gradients,this study identified two pathways through which B.subtilis enhances drought resistance:soil amelioration and antioxidant regulation.These find-ings establish a theoretical foundation for drought-resistant psammophyte cultivation and optimized inoculant strategies in the Three-North Regions.

关键词

枯草芽孢杆菌/沙打旺/羊柴/干旱胁迫/抗氧化能力

Key words

Bacillus subtilis/Astragalus laxmannii/Corethrodendron fruticosum/drought stress/antioxidant capacity

引用本文复制引用

PENG Lixue,WU Weiting,GAO Guanglei,DING Guodong,ZHANG Ying..干旱胁迫下枯草芽孢杆菌对沙打旺和羊柴幼苗抗氧化能力的影响[J].干旱区研究,2025,42(12):2256-2267,12.

基金项目

内蒙古自治区重点研发计划项目(2025YFHH0276) （2025YFHH0276）

内蒙古自治区科技重大专项(2024JBGS009) （2024JBGS009）

干旱区研究

OA北大核心

ISSN：1001-4675

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