10.22376/ijpbs.2019.10.1.p1-12 Volume 1 Issue 4 2010 (October - December) Microorganisms are abundant in soil possessing ability to produce economically valuable substances like enzymes, antibiotics, hormones, etc. Actinomycetes especially lessThan i greaterThan Streptomyces lessThan /i greaterThan predominate organic soil. In the present study lessThan i greaterThan Streptomyces gibosonni, Streptomyces caerulius, Streptomyces viridochromogenes, Streptomyces gresioluteus lessThan /i greaterThan and lessThan i greaterThan Streptomyces clavifer lessThan /i greaterThan were isolated from different soil samples. Their effect on growth of crop plants and herbs was analysed. lessThan i greaterThan S.viridochromogenes lessThan /i greaterThan and lessThan i greaterThan S.clavifer lessThan /i greaterThan found to be inhibiting seed germination of crop plants while lessThan i greaterThan S.gibosonni lessThan /i greaterThan and lessThan i greaterThan S.grieseoleutus lessThan /i greaterThan induced seed germination. P. Venkatachalam,J. Ronald, K. Sambath Streptomyces, seed germination, Phosphinothricin, Actinomycetes. 145-155