נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Pectate lyase affects pathogenicity in natural isolates of Colletotrichum coccodes and in pelA gene-disrupted and gene-overexpressing mutant lines
Year:
2012
Source of publication :
Molecular Plant Pathology
Authors :
Tsror, Leah
;
.
Volume :
13
Co-Authors:
Ben-Daniel, B.-H., Department of Plant Pathology, Agricultural Research Organization, Gilat Research Center, M.P. Negev 85280, Israel, Department of Life Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
Bar-Zvi, D., Department of Life Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
Tsror Lahkim, L., Department of Plant Pathology, Agricultural Research Organization, Gilat Research Center, M.P. Negev 85280, Israel
Facilitators :
From page:
187
To page:
197
(
Total pages:
11
)
Abstract:
Colletotrichum coccodes (Wallr.) S. Hughes, the causal agent of black dot on potato and anthracnose on tomato, reduces yield and crop quality. We explored the role of secreted pectate lyase (PL), a cell wall-degrading enzyme, in the aggressiveness of C. coccodes. Invitro-cultivated highly aggressive isolates secreted immunologically detectable PL levels 6h after transfer to secondary medium versus 12h for mildly aggressive isolates, suggesting that secreted PL is a virulence factor. The gene encoding PL, CcpelA, was cloned and used for the genetic manipulation of highly (US-41 and Si-72) and mildly (Si-60) aggressive isolates. CcpelA gene-disrupted mutants showed reduced aggressiveness towards tomato fruits and impaired PL secretion and extracellular activity. Conversely, overexpression of CcpelA in the Si-60 isolate increased its aggressiveness and PL secretion. Comparison of CcpelA cloned from isolates US-41 and Si-60 revealed that both encode identical proteins, but differ in their promoters. Bioinformatics analysis for cis-acting elements suggested that the promoters of the US-41 and Si-60 isolates contain one and no AreA-binding site (GATA box), respectively. AreA has been suggested to be involved in fungal aggressiveness; therefore, CcpelA may be a key virulence factor in C. coccodes pathogenicity, and the differences in isolate aggressiveness might result from promoter activity. Quantitative reverse transcriptase-polymerase chain reaction analyses confirmed the higher level of CcpelA transcript in isolate US-41 versus Si-60. © 2011 The Authors. Molecular Plant Pathology © 2011 BSPP and Blackwell Publishing Ltd.
Note:
Related Files :
Colletotrichum
Genes, Fungal
Genetics
genetic transformation
metabolism
molecular genetics
Solanum tuberosum
Show More
Related Content
More details
DOI :
10.1111/j.1364-3703.2011.00740.x
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
23223
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:57
You may also be interested in
Scientific Publication
Pectate lyase affects pathogenicity in natural isolates of Colletotrichum coccodes and in pelA gene-disrupted and gene-overexpressing mutant lines
13
Ben-Daniel, B.-H., Department of Plant Pathology, Agricultural Research Organization, Gilat Research Center, M.P. Negev 85280, Israel, Department of Life Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
Bar-Zvi, D., Department of Life Sciences, Ben-Gurion University, Beer-Sheva 84105, Israel
Tsror Lahkim, L., Department of Plant Pathology, Agricultural Research Organization, Gilat Research Center, M.P. Negev 85280, Israel
Pectate lyase affects pathogenicity in natural isolates of Colletotrichum coccodes and in pelA gene-disrupted and gene-overexpressing mutant lines
Colletotrichum coccodes (Wallr.) S. Hughes, the causal agent of black dot on potato and anthracnose on tomato, reduces yield and crop quality. We explored the role of secreted pectate lyase (PL), a cell wall-degrading enzyme, in the aggressiveness of C. coccodes. Invitro-cultivated highly aggressive isolates secreted immunologically detectable PL levels 6h after transfer to secondary medium versus 12h for mildly aggressive isolates, suggesting that secreted PL is a virulence factor. The gene encoding PL, CcpelA, was cloned and used for the genetic manipulation of highly (US-41 and Si-72) and mildly (Si-60) aggressive isolates. CcpelA gene-disrupted mutants showed reduced aggressiveness towards tomato fruits and impaired PL secretion and extracellular activity. Conversely, overexpression of CcpelA in the Si-60 isolate increased its aggressiveness and PL secretion. Comparison of CcpelA cloned from isolates US-41 and Si-60 revealed that both encode identical proteins, but differ in their promoters. Bioinformatics analysis for cis-acting elements suggested that the promoters of the US-41 and Si-60 isolates contain one and no AreA-binding site (GATA box), respectively. AreA has been suggested to be involved in fungal aggressiveness; therefore, CcpelA may be a key virulence factor in C. coccodes pathogenicity, and the differences in isolate aggressiveness might result from promoter activity. Quantitative reverse transcriptase-polymerase chain reaction analyses confirmed the higher level of CcpelA transcript in isolate US-41 versus Si-60. © 2011 The Authors. Molecular Plant Pathology © 2011 BSPP and Blackwell Publishing Ltd.
Scientific Publication
You may also be interested in