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254167

DEGRADATION OF PLANT PATHOGENIC FUNGI BY Streptomycetes

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Last updated: 22 Jan 2023

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Abstract

  An isolate of Strep < /em>tomyces sp. excreted chitinase, cellulase and protease
activities into the medium when grown on chitin, carboxymethylcellulose and
casein ,respectively, or on cell walls of the fungal pathogen Sclerotium rolfsii or
Rhizoctonia solni, as sole carbon source. This isolate of Streptomyces sp. gave
highest lytic enzymes ( chitinase , cellulase, protease ), when grown at28 °C. Factors
involved in the production of enzymes were investigated. The lytic activities were
produced optimally in the medium at' pH range between 6.5-7.0 for the three
enzymes . The lytic activities of culture on autoclaved mycelium of S. rolfsii and R ..
solani took place at different pH values .The effect of mycelium concentration as
substrate on the extent on mycelium lysis and lytic activities were also studied. The
level of hydrolytic enzymes, produced by Streptomyces sp. depended on the source
of mycelium attacked i. e. S. rolfsii or R. so/ani in soil.

DOI

10.21608/jssae.2002.254167

Keywords

Streptomyces sp, biological control, Lytic enzyme, wilt disease

Authors

First Name

Moataza

Last Name

Saad,

MiddleName

M.

Affiliation

Microbial Chemistry Department National Research Center, Dokki, Egypt

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Volume

27

Article Issue

4

Related Issue

36123

Issue Date

2002-04-01

Receive Date

2002-03-19

Publish Date

2002-04-01

Page Start

2,761

Page End

2,774

Print ISSN

2090-3685

Online ISSN

2090-3766

Article File

JSSAE_Volume 27_Issue 4_Pages 2761-2774.pdf

PDF . 4.2MB

Link

https://jssae.journals.ekb.eg/article_254167.html

Detail API

https://jssae.journals.ekb.eg/service?article_code=254167

Order

9

Type

Original Article

Type Code

889

Publication Type

Journal

Publication Title

Journal of Soil Sciences and Agricultural Engineering

Publication Link

https://jssae.journals.ekb.eg/

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Article

Created At

22 Jan 2023