Allelopathic effects of Streptomyces sp. 6803 on plants

Streptomyces can produce an overwhelming majority of known antibiotics and several biologically active compounds, but whether Streptomyces can display allelopathic effects on higher plants is largely unknown. In this study, seven actinomyces strains isolated from soils showed inhibitory effect on pl...

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Bibliographic Details
Published inYing yong sheng tai xue bao Vol. 23; no. 10; p. 2728
Main Authors Song, Yuan-Yuan, Huang, Ke, Shi, Mu-Biao, Chen, Min, Zeng, Ren-Sen
Format Journal Article
LanguageChinese
Published China 01.10.2012
Subjects
Allelopathy
Brassica - growth & development
Brassica - metabolism
Echinochloa - growth & development
Echinochloa - metabolism
Pheromones - metabolism
Seedlings - growth & development
Seedlings - metabolism
Soil Microbiology
Streptomyces - isolation & purification
Streptomyces - metabolism
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Summary:Streptomyces can produce an overwhelming majority of known antibiotics and several biologically active compounds, but whether Streptomyces can display allelopathic effects on higher plants is largely unknown. In this study, seven actinomyces strains isolated from soils showed inhibitory effect on plant seedlings growth, among which, Streptomyces sp. 6803 had strong capability in inhibiting the seedlings growth of Brassica campestris and Echinochloa crusgalli in both solid and liquid cultures. The dilute solution (x 5) of fermented broth inhibited the seedlings growth of B. campestris and E. crusgalli by 60.7% and 61.3%, respectively. Based on the morphological and physiological-biochemical characteristics and 16S rRNA sequencing, Streptomyces sp. 6803 was identified as Streptomyces arenae, with the 16S rRNA sequence identity being 99.28%. Ultraviolet radiation and diethyl sulfate (DES) were used to produce mutants to enhance the allelopathic potential of this strain. After 80 and 100 seconds of ultraviolet ra
ISSN:1001-9332