Diversity of Endophytic Actinomycetes Producing Indole-3- Acetic Acid and In vitro Evaluation of Plant Growth-promoting Activity on Brassica oleracea L.

The evaluation of endophytic actinomycetes diversity, growth-promoting strain effects on cauliflower seeds germination, and in vitro organogenesis are the objectives this study. Moreover, 15 strains from 125 isolates were determined to produce indole-3- acetic acid (IAA), where majority was obtained roots (66.67%), followed by branches (26.67%) leaves (6.67%). Specifically, Jatropha sp. is a plant species with most content compared others. In addition, all Streptomyces screened based IAA production ability yeast extract–malt extract broth (YMG) medium. results showed tendency for one code KMR-1E generate maximum isolate Cinnamomun plant. Furthermore, molecular taxonomy phylogenetic analysis recreated 16S rRNA gene sequences, which attributed KMR- 1E genus Streptomyces. Meanwhile, growth promotion evaluated under condition. This exposed individual enhance shoot root length cauliflowers. untreated cultures free agar block used as control.