草业科学2024，Vol.41Issue(7)：1632-1644,13.DOI:10.11829/j.issn.1001-0629.2024-0002
2个海拔梯度种源鬼箭锦鸡儿根际土壤细菌对温度变化的响应
Response of rhizosphere soil bacteria to temperature changes in Caragana jubata from different elevation provenances
摘要
Abstract
Rhizosphere microorganisms are closely related to the ecological adaptations of plants.Studying the response of plant rhizosphere microorganisms to environmental changes can help provide a better understanding of the ecological adaptation of plants.In this study,the differences in rhizosphere soil bacterial diversity and community structure as well as the root functional traits of Caragana jubata at different elevations(A1:2 950 m and A2:3 530 m)were comparatively analyzed under different temperature conditions(T1:10 ℃ and T2:25 ℃).The results showed that temperature change significantly affected the Chao1 index(P＜0.05)of C.jubata from A1 provenance but had a weak effect on the Chao1 and Shannon indexes of C.jubata from A2 provenance.Principal coordinate analysis showed that temperature change significantly affected the rhizosphere soil community structure(r=0.53,P＜0.05)of the provenance from A2.Compared with T2,T1 significantly increased the relative abundance of Actinobacteria and Pseudomonas for the provenance at A1 and increased the relative abundance of Kapabacteria,Cellvibrio,Glutamicibacter,Microbacterium,and Nocardia of C.jubata from A2 provenance(P＜0.05).Meanwhile,temperature change significantly decreased the root surface area,number of root tips,mean root diameter,root volume,and root length of C.jubata from the A1 provenance(P＜0.05)but only had a significant effect on the mean root diameter of C.jubata from A2 provenance.In addition,Mantel test showed that the bacterial community structure of C.jubata from A1 provenance was significantly affected by temperature,root length,and root mean diameter(P＜0.05)whereas that of C.jubata from A2 provenance was significantly affected by temperature,root volume,root surface area,and root mean diameter(P＜0.05).In conclusion,the present study demonstrated that the rhizosphere bacterial diversity and community and root traits of different altitude provenances of C.jubata varied in their responses to temperature changes and that root traits had a strong impact on the variation of bacterial diversity and community.关键词
鬼箭锦鸡儿/海拔种源/土壤细菌/群落结构/多样性/根系性状/温度Key words
Caragana jubata/elevation provenance/soil bacteria/community structure/diversity/root traits/temperature引用本文复制引用
张隆安,徐婷婷,魏庐潞,马周娟,马飞..2个海拔梯度种源鬼箭锦鸡儿根际土壤细菌对温度变化的响应[J].草业科学,2024,41(7):1632-1644,13.基金项目
宁夏自然科学基金项目(2022AAC05008) （2022AAC05008）
