Pectinolytic and Cellulolytic Enzymes Enhance Fusarium compactum Virulence on Tubercles Infection of Egyptian Broomrape.
Int J Microbiol 2011;
2010:273264. [PMID:
21318162 PMCID:
PMC3026981 DOI:
10.1155/2010/273264]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 12/09/2010] [Indexed: 11/28/2022] Open
Abstract
The use of enzyme could facilitate pathogen penetration into plant host. Here the combination of cellulase and pectinase was ascertained on the pathogenicity of F. compactum (1.4 × 106 propagules ml−1) on broomrape tubercles. F. compactum alone infected all the inoculated tubercles but did not kill any significant number. Infested tomato roots that were inoculated with mycelia plus pectinase (20 U ml−1) had over 50% tubercles dead one week after treatment. Those inoculated with mycelia plus cellulase (20 U ml−1) had above 60% mortality. Mixtures of mycelial plus the two enzymes (10 U ml−1 of each enzyme) showed synergy. The activity catalyzed by an enzyme is a measure of the amount of enzyme present. It was shown that, in a 1 mg (10 U mg−1) cellulase used, 0.055 mg pectinase (1.1 U mg−1) is present. This explains why mycelial plus cellulase mix contends with mycelial plus the two enzymes.
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