草地学报2026，Vol.34Issue(7)：2440-2449,10.DOI:10.11733/j.issn.1007-0435.2026.07.009
副地衣芽孢杆菌对多年生黑麦草非生物胁迫抗性的生理调控机制
Physiological Mechanisms Underlying the Modulation of Abiotic Stress Tolerance in Perennial Ryegrass by Bacillus paralicheniformis
摘要
Abstract
To investigate the physiological regulation mechanisms of plant growth-promoting bacteria on the drought,cold,and saline-alkali stress tolerance of perennial ryegrass(Lolium perenne L.),this study used Bacillus paralicheniformis(NCBI ID:PRJNA 1402526)as the test strain.A pot inoculation experiment was conducted under three abiotic stress conditions-drought,cold,and saline-alkali stress—to analyze the effects of rhizosphere inoculation on the growth indices,physiological characteristics,and root morphology of perennial ryegrass.The results showed that inoculation with B.paralicheniformis significantly alleviated the growth inhi-bition caused by abiotic stresses.Compared to the non-inoculated control,the inoculated plants exhibited signifi-cantly increased plant height,above-ground and below-ground biomass,along with markedly reduced leaf rela-tive conductivity and malondialdehyde content.Additionally,the activities of superoxide dismutase,peroxi-dase,and catalase,as well as the contents of proline and soluble sugars,were significantly enhanced(P<0.05).Moreover,root system architecture was notably improved.In conclusion,inoculation with B.parali-cheniformis can significantly enhance the resistance of perennial ryegrass to drought,cold,and saline-alkali stresses by synergistically strengthening its antioxidant defense capacity,osmoregulatory function,and root morphological configuration.关键词
副地衣芽孢杆菌/多年生黑麦草/非生物胁迫/抗氧化酶/渗透调节/根系形态Key words
Bacillus paralicheniformis/Perennial ryegrass/Abiotic stress/Antioxidant enzymes/Osmotic regu-lation/Root morphology分类
农业科技引用本文复制引用
于乔,王鹤潼,杨万强,孟庆娴,张宇婧,普布卓玛,呼天明,付娟娟..副地衣芽孢杆菌对多年生黑麦草非生物胁迫抗性的生理调控机制[J].草地学报,2026,34(7):2440-2449,10.基金项目
西藏自治区重点研发及转化项目-二次科考项目(XZ202502ZY0050)资助 （XZ202502ZY0050）
