中国马铃薯2025，Vol.39Issue(6)：429-437,9.DOI:10.19918/j.cnki.1672-3635.2025.06.005
Halobacillus marinus缓解马铃薯盐胁迫的研究
Research on Halobacillus marinus Alleviating Salt Stress in Potatoes
摘要
Abstract
Salt stress is one of the limiting factors affecting crop growth and development.Potato is a moderately salt-tolerant crop,and soil salinization severely impacts potato quality and yield,leading to economic losses.In recent years,plant growth-promoting Rhizobacteria(PGPR)have attracted widespread attention due to their ability to promote plant growth and enhance stress tolerance.In this study,the previously isolated salt-tolerant bacterium H.marinus was used to investigate its interaction with potato seedlings under NaCl stress.H.marinus was capable of growing on LB solid medium with a salt concentration of 120 g/L and secreted 12.820 mg/L of Indole-3-acetic acid(IAA)in LB liquid medium.Compared with the NaCl treatment alone,inoculation with H.marinus under the same salt stress conditions increased plant height,fresh weight,and dry weight of potato seedlings by 19.54%,67.37%,and 65.36%,respectively,while root length showed no significant difference.Additionally,root activity,ascorbate peroxidase activity,and catalase activity in potato seedlings increased by 130.87%,85.48%,and 23.86%,respectively,whereas peroxidase activity did not change significantly.Meanwhile,malondialdehyde content and superoxide anion content decreased by 12.60%and 29.62%,respectively.The results indicate that H.marinus can enhance potato tolerance to salt stress,helping potato seedlings restore normal physiological metabolic activities in their root systems under saline conditions,thereby enabling them to withstand salt stress and promote growth and development.This study would provide important bacterial strain resources for mitigating salt stress in potatoes using microorganisms and offer new insights for the development and utilization of saline cultivated land.关键词
耐盐促生菌/马铃薯/盐胁迫/促生/Halobacillus marinusKey words
salt tolerant and growth promoting bacteria/potato/salt stress/growth promotion/Halobacillus marinus分类
农业科技引用本文复制引用
廖美智,王衍蘇,关宇奇,王宏宇,韩雪,石瑛..Halobacillus marinus缓解马铃薯盐胁迫的研究[J].中国马铃薯,2025,39(6):429-437,9.基金项目
黑龙江省自然科学基金(LH2023C005). （LH2023C005）
