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Titolo:
Endopolygalacturonase is essential for citrus black rot caused by Alternaria citri but not brown spot caused by Alternaria alternata
Autore:
Isshiki, A; Akimitsu, K; Yamamoto, M; Yamamoto, H;
Indirizzi:
Kagawa Univ, Dept Life Sci, Fac Agr, Kagawa 7610795, Japan Kagawa Univ Kagawa Japan 7610795 ife Sci, Fac Agr, Kagawa 7610795, Japan Kagawa Univ, United Grad Sch Agr Sci, Kagawa 7610795, Japan Kagawa Univ Kagawa Japan 7610795 Grad Sch Agr Sci, Kagawa 7610795, Japan Okayama Univ, Fac Agr, Okayama 7008530, Japan Okayama Univ Okayama Japan7008530 Univ, Fac Agr, Okayama 7008530, Japan
Titolo Testata:
MOLECULAR PLANT-MICROBE INTERACTIONS
fascicolo: 6, volume: 14, anno: 2001,
pagine: 749 - 757
SICI:
0894-0282(200106)14:6<749:EIEFCB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
ROUGH LEMON PATHOTYPE; COCHLIOBOLUS-CARBONUM; EXTRACELLULAR ENDOPOLYGALACTURONASE; CELL-WALL; GENE; POLYGALACTURONASE; VIRULENCE; MAIZE; PATHOGENICITY; PATHOGENESIS;
Keywords:
ACR-toxin; host-specific toxin; pectinase;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Akimitsu, K Kagawa Univ, Dept Life Sci, Fac Agr, Kagawa 7610795, Japan Kagawa Univ Kagawa Japan 7610795 Agr, Kagawa 7610795, Japan
Citazione:
A. Isshiki et al., "Endopolygalacturonase is essential for citrus black rot caused by Alternaria citri but not brown spot caused by Alternaria alternata", MOL PL MICR, 14(6), 2001, pp. 749-757

Abstract

Alternaria citri, the cause of Alternaria black rot, and Alternaria alternata rough lemon pathotype, the cause of Alternaria brown spot, are morphologically indistinguishable pathogens of citrus: one causes rot by maceratingtissues and the other causes necrotic spots by producing a host-selective toxin. To evaluate the role of endopolygalacturonase (endoPG) in pathogenicity of these two Alternaria spp, pathogens, their genes for endoPG were mutated by gene targeting, The endoPGs produced by these fungi have similar biochemical properties, and the genes are highly similar (99.6% nucleotide identity). The phenotypes of the mutants, however, are completely different. An endoPG mutant of A. citri was significantly reduced in its ability to cause black rot symptoms on citrus as well as in the maceration of potato tissue and could not colonize citrus peel segments. In contrast, an endoPG mutant of A. alternata was unchanged in pathogenicity. The results indicate that a cell wail-degrading enzyme can play different roles in the pathogenicity of fungal pathogens, The role of a cell wall-degrading enzyme depends upon the type of disease but not the taxonomy of the fungus.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 10:21:31