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Expression of pectate lyase from Colletotrichum gloeosporioides in C. magna promotes pathogenicity
Year:
2000
Authors :
Freeman, Stanley
;
.
Prusky, Dov
;
.
Volume :
13
Co-Authors:
Yakoby, N., Dept. Postharvest Sci. Fresh Produce, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel, Dept. Plant Pathol. and Microbiol., Hebrew University of Jerusalem, Fac. Agriclutural, Food Environ. Q., Rehovot 76100, Israel
Freeman, S., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Dinoor, A., Dept. Plant Pathol. and Microbiol., Hebrew University of Jerusalem, Fac. Agriclutural, Food Environ. Q., Rehovot 76100, Israel
Keen, N.T., Department of Plant Pathology, University of California, Riverside, CA 95250, United States
Prusky, D., Dept. Postharvest Sci. Fresh Produce, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Facilitators :
From page:
887
To page:
891
(
Total pages:
5
)
Abstract:
To test the contribution of pectate lyase (PL) to promoting fungal pathogenicity, a pectate lyase gene (pel) from the avocado pathogen Colletotrichum gloeosporioides, isolate Cg-14, was expressed in C. magna isolate L-2.5, a pathogen of cucurbits that causes minor symptoms in watermelon seedlings and avocado fruits. Isolate L-2.5 was transformed with pPCPH-1 containing hph-B as a selectable marker and the 4.1-kb genomic pel clone. Southern hybridization, with the 4.1-kb genomic pel clone or 2.13-kb hph-B cassette as probes, detected integration of pel in transformed C. magna isolates Cm-PL-3 and Cm-PL-10. Western blot (immunoblot) analysis with antibodies against Cg-14 PL detected a single PL secreted by L-2.5 at a molecular mass of 41.5 kDa, whereas the PL of C. gloeosporioides had a molecular mass of 39 kDa. When PL activity was measured 4 days after inoculation in pectolytic enzyme-inducing media (PEIM), transformed isolates Cm-PL-3 and Cm-PL-10 showed additive PL activity relative to both Cg-14 and L-2.5. Transformed isolates also showed additive maceration capabilities on avocado pericarp relative to the wild-type C. magna alone, but did not reach the maceration ability of C. gloeosporioides. However, more severe maceration and damping off developed in watermelon seedlings inoculated with the transformed isolates compared with the two wild-type isolates, which showed no symptom development on these seedlings during the same period. Results dearly show the contribution of a single pel to the pathogenic abilities of C. magna and suggest that PL is a pathogenicity factor required for the penetration and colonization of Colletotrichum species.
Note:
Related Files :
Citrullus lanatus
Colletotrichum
fungi
genetic transformation
Persea americana
Plants
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30430
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:54
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Scientific Publication
Expression of pectate lyase from Colletotrichum gloeosporioides in C. magna promotes pathogenicity
13
Yakoby, N., Dept. Postharvest Sci. Fresh Produce, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel, Dept. Plant Pathol. and Microbiol., Hebrew University of Jerusalem, Fac. Agriclutural, Food Environ. Q., Rehovot 76100, Israel
Freeman, S., Department of Plant Pathology, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Dinoor, A., Dept. Plant Pathol. and Microbiol., Hebrew University of Jerusalem, Fac. Agriclutural, Food Environ. Q., Rehovot 76100, Israel
Keen, N.T., Department of Plant Pathology, University of California, Riverside, CA 95250, United States
Prusky, D., Dept. Postharvest Sci. Fresh Produce, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Expression of pectate lyase from Colletotrichum gloeosporioides in C. magna promotes pathogenicity
To test the contribution of pectate lyase (PL) to promoting fungal pathogenicity, a pectate lyase gene (pel) from the avocado pathogen Colletotrichum gloeosporioides, isolate Cg-14, was expressed in C. magna isolate L-2.5, a pathogen of cucurbits that causes minor symptoms in watermelon seedlings and avocado fruits. Isolate L-2.5 was transformed with pPCPH-1 containing hph-B as a selectable marker and the 4.1-kb genomic pel clone. Southern hybridization, with the 4.1-kb genomic pel clone or 2.13-kb hph-B cassette as probes, detected integration of pel in transformed C. magna isolates Cm-PL-3 and Cm-PL-10. Western blot (immunoblot) analysis with antibodies against Cg-14 PL detected a single PL secreted by L-2.5 at a molecular mass of 41.5 kDa, whereas the PL of C. gloeosporioides had a molecular mass of 39 kDa. When PL activity was measured 4 days after inoculation in pectolytic enzyme-inducing media (PEIM), transformed isolates Cm-PL-3 and Cm-PL-10 showed additive PL activity relative to both Cg-14 and L-2.5. Transformed isolates also showed additive maceration capabilities on avocado pericarp relative to the wild-type C. magna alone, but did not reach the maceration ability of C. gloeosporioides. However, more severe maceration and damping off developed in watermelon seedlings inoculated with the transformed isolates compared with the two wild-type isolates, which showed no symptom development on these seedlings during the same period. Results dearly show the contribution of a single pel to the pathogenic abilities of C. magna and suggest that PL is a pathogenicity factor required for the penetration and colonization of Colletotrichum species.
Scientific Publication
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