生物资源2026，Vol.48Issue(4)：361-371,11.DOI:10.14188/j.ajsh.20260206001
油樟源促生细菌筛选及其对小麦耐盐性的影响
Screening of growth-promoting bacteria from Cinnamomum longipaniculatum and their effects on wheat salt tolerance
摘要
Abstract
Soil salinization poses a serious threat to crop production.Plant growth-promoting bacteria(PGPB)represent an important biological resource for enhancing crop salt tolerance.To explore growth-promoting bacteria associated with the characteristic aromatic plant Cinnamomum longipaniculatum that can improve crop salt tolerance,bacteria were isolated from its leaves,rhizosphere,and rhizosphere soil,and identified via 16S rRNA gene sequencing.Representative strains were selected to treat wheat seeds,and their effects on seed germination,seedling growth,and key physiological parameters were systematically evaluated under 0.4%NaCl stress.The results revealed that 8 representative strains belonging to different species exerted varying effects on wheat salt tolerance,among which Paenibacillus xylanilyticus strain J4 exhibited the best performance.This strain effectively alleviated the inhibition of wheat growth under salt stress,significantly increased coleoptile length,plant height,root length,biomass,and chlorophyll b content in seedlings,and all the above indicators were superior to those treated with the positive control strain Bacillus subtilis Es-1.Further investigation showed that J4 treatment significantly enhanced α-amylase activity during early wheat seed germination,but did not induce significant changes in superoxide dismutase(SOD)and catalase(CAT)activities,suggesting that its growth-promoting mechanism may primarily involve the activation of early energy metabolism rather than directly relying on the enhancement of classical antioxidant enzyme systems.This study explored the function of C.longipaniculatum-associated bacteria in enhancing crop salt tolerance,providing an excellent microbial strain and a theoretical basis for the development of stress-resistant microbial agents derived from unique ecological niches.关键词
油樟/植物促生菌/解木聚糖类芽胞杆菌/小麦/盐胁迫/促生机制Key words
Cinnamomum longipaniculatum/plant growth-promoting bacteria/Paenibacillus xylanilyticus/wheat/salt stress/growth-promoting mechanism分类
农业科技引用本文复制引用
代娅,王嘉怡,唐玉容,周钰彤,杨云云,刘蓉..油樟源促生细菌筛选及其对小麦耐盐性的影响[J].生物资源,2026,48(4):361-371,11.基金项目
四川省油樟工程技术研究中心开放基金(21YZY05) （21YZY05）
