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Isolation and characterization of endophytic Streptomyces sp. S5 with herbicidal activity from tomato roots

Published online by Cambridge University Press:  12 February 2007

Qiu Zhi-Qi ,
Cao Li-Xiang ,
Tan Hong-Ming  and
Zhou Shi-Ning
Qiu Zhi-Qi
Affiliation:
State Key Laboratory for Biological Control, College of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China Department of Information Management, Sun Yat-sen University, Guangzhou 510275, China
Cao Li-Xiang
Affiliation:
State Key Laboratory for Biological Control, College of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
Tan Hong-Ming
Affiliation:
State Key Laboratory for Biological Control, College of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
Zhou Shi-Ning*
Affiliation:
State Key Laboratory for Biological Control, College of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
*
*Corresponding author: Email: [email protected]
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Abstract

Fifty-eight actinomycetes were isolated from surface-sterilized tomato (Lycopersicon esculentum) roots and 43 isolates were screened for herbicidal activities. Isolate S5 was found to have potent herbicidal activity against germination of wheat (Triticum aestivum L.), mung bean (Phaseolus radiatus L.) and grass (Paspalum notatum and Cynodon dactylon) seeds. But the metabolites of isolate S5 showed no influence on the growth of wheat seedlings. The S5 strain was identified as Streptomyces lavendulae var. glaucescens based on its morphological characteristics and physiological properties. The highest herbicidal activity was observed when 2% inocula were applied into S medium (containing 1% glucose, 0.3% beef extract and pH 7.0) and incubated at 25°C on a rotary shaker (160 rpm).

Keywords

biological controlendophytic actinomycetesherbicidal activitytomato
Type
Research Article
Information
Chinese Journal of Agricultural Biotechnology , Volume 3 , Issue 1 , April 2006 , pp. 7 - 12
Copyright
Copyright © China Agricultural University and Cambridge University Press 2006

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