Correlative evidence for peroxidase involvement in disease resistance against Alternaria leaf blight of tomato

• Autorzy: Hammed A. , Akhtar K. P. , Saleem M. Y. , Asghar M.
• Języki publikacji: EN

Abstrakty

EN

Eighteen tomato genotypes, with varying degree of response to Alternaria leaf blight disease (ALBD) were used to assess the possible involvement of protease and peroxidase activities in disease response. Preinfectional protease activity varied noticeably in tested genotypes. Highest pre-infectional protease activity was observed in susceptible genotype CLN-2123. Post-infectional protease activity level was generally lower when compared with pre-infectional level in all genotypes with exception of unchanged level in Tibrido. There was no correlation between post-infectional protease activity and percent disease index (%DI). In contrast, pre- and postinfectional leaf peroxidase activities showed a significant (p<0.01) negative correlation with %DI. Genotypes with higher pre-infectional peroxidase activity performed better on exposure to Alternaria alternata infection and accumulate enhanced peroxidase activity. Tibrido accumulated highest peroxidase activity while level was lowest in 1621P, which showed highest ALBD incidence. Moreover, genotypes with better resistance to A. alternata infection maintained higher post-infectional peroxidase activity. In resistant (Tibrido) and all moderately resistant genotypes, leaf peroxidase activity raised after inoculation when compared with the pre-inoculation level. I summary, higher pre- and post-infectional peroxidase activity was found to be associated with Alternaria leaf blight resistance. The peroxidase activity can be used as a biochemical tool in marker-assisted screening of tomato germplasm for Alternaria leaf blight resistance.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2010
• Tom: 32
• Numer: 6
• Opis fizyczny: p.1171-1176,fig.,ref.

Twórcy

autor

Hammed A.

• P.B.G. Division, Nuclear Institute for Agriculture and Biology (NIAB), PO Box 128, Faisalabad, Pakistan

autor

Akhtar K. P.

• P.B.G. Division, Nuclear Institute for Agriculture and Biology (NIAB), PO Box 128, Faisalabad, Pakistan

autor

Saleem M. Y.

• P.B.G. Division, Nuclear Institute for Agriculture and Biology (NIAB), PO Box 128, Faisalabad, Pakistan

autor

Asghar M.

• P.B.G. Division, Nuclear Institute for Agriculture and Biology (NIAB), PO Box 128, Faisalabad, Pakistan

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