The objective of the present study was (1) to isolate endophytic bacteria from Ageratum conyzoides L. and Mikania micrantha Kunth of shifting cultivation in Mizoram, (2) screen in vitro their potential for plant growth-promoting (PGPR) activities and (3) to identify endophytic bacteria positive for PGPR. A total of 9 endophytic bacteria showed positive for PGPR properties. Potential PGPR endophytic bacteria were selected for further characterization of their genotype 16S rRNA sequencing. 16S rRNA sequencing revealed that isolated bacteria belong to six different genus and five families. This study helps us to understand the diversity of the endophytic bacteria from the selected plants of shifting cultivation and strengthen our research on endophytes of their potential for PGPR activities. Survival of endophytic bacteria under unfavourable conditions is an indicative of their resistance for biotic and abiotic stresses.

本研究的目的是 (1) 从Ageratum conyzoides L. 和Mikania micrantha 中分离内生细菌米佐拉姆邦轮垦的 Kunth，(2) 在体外筛选它们促进植物生长 (PGPR) 活性的潜力和 (3) 鉴定内生细菌对 PGPR 呈阳性。共有 9 种内生细菌显示出 PGPR 特性阳性。选择潜在的 PGPR 内生细菌以进一步表征其基因型 16S rRNA 测序。16S rRNA 测序显示分离出的细菌属于六个不同的属和五个科。这项研究有助于我们了解所选轮作植物中内生细菌的多样性，并加强我们对内生细菌进行 PGPR 活性潜力的研究。内生细菌在不利条件下的存活表明它们对生物和非生物胁迫具有抗性。