首页|Divergent responses of growth rate and antioxidative system of ten Bacillus strains to acid stresses

Divergent responses of growth rate and antioxidative system of ten Bacillus strains to acid stresses

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
·Response of growth rate and antioxidative system of ten Bacillus strains to acid stresses was assayed.·Strong acid treatment significantly decreased the growth rate of the strains.·Acid stresses increased the GPX activity and GSSG content of the tested strains.·Divergent changes occurred in ROS and antioxidative system(SOD,CAT,GR,MDA and GSH).Environmental changes including soil acidification exert obvi-ous stresses on soil ecosystems and influence soil microor-ganisms.In this study,ten microbial strains were incubated under different acid treatments to investigate responses of microbial growth and antioxidative system to acid stress.All the strains belong to Bacillus genus,but exhibit distinct ecological functions.We observed that these microbial strains had obviously different pH tolerance threshold,in spite of the close phylogenetic classification among strains.Acid stresses exerted significant effects on microbial antiox-idative system,including superoxide dismutase(SOD),cata-lase(CAT)and glutathione transferring enzymes(GPX and GR)and reactants(GSH and GSSH),but the effects were strain specific.Furthermore,we found acid stress effects on total variances of the investigated microbial antioxidative system along the first two principal components(PCs).Activities of CAT and SOD contributed substantially to PC1 that reflected obvious acid effects on NC7 and ZC4,and closely related to intracellular malondialdehyde content.The GSSG activities and GSH/GSSG contributed greatly to PC2 that unveiled acid stress effects on most of the microbial strains.Our results highlight substantially heterogeneous responses of microbial strains to acid stress and support that phylogenetic closeness does not imply functional similarity of soil microorganisms under environmental changes.

soil acidificationmicrobial strainacid tolerance capacitymicrobial growthoxidative stressantioxidative system

Xiaoran Shan、Jiayi Chen、Jiaen Zhang、Ziqiang Liu、Shufang Chen、Hui Wei

展开 >

Key Laboratory of Agro-Environment in the Tropics of Ministry of Agriculture and Rural Affairs,Guangdong Laboratory for Lingnan Modern Agriculture,College of Natural Resources and Environment,South China Agricultural University,Guangzhou 510642,China

Guangdong Engineering Research Center for Modem Eco-agriculture and Circular Agriculture,South China Agricultural University,Guangzhou 510642,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJoint Team Project of Guangdong Laboratory for Lingnan Modern AgricultureGuangdong Science and Technology Department

U170123632071641NT20210102021A1515012507

2024

10.1007/s42832-023-0192-4

土壤生态学快报(英文)

土壤生态学快报(英文)

ISSN：
年,卷(期)：2024.6(1)
  • 50