Fig. 4From: Exploiting the aerobic endospore-forming bacterial diversity in saline and hypersaline environments for biosurfactant productionPhylogenetic tree of 16S rRNA gene sequences (approximately 800Â bp) showing the relationship among the endospore-forming bacterial isolates. The tree was constructed based on the unweighted pair group method with arithmetic mean (UPGMA). Numbers on nodes represent bootstrap values with 1,000 repetitionsBack to article page