ISHS Acta Horticulturae 575: International Symposium on Tropical and Subtropical Fruits
BENZOTHIADIAZOLE (BTH) ACTIVATES SYSTEMIC ACQUIRED RESISTANCE (SAR) RESPONSES IN PAPAYA TO REDUCE DISEASE SYMPTOMS OF SEEDLINGS INOCULATED WITH PHYTOPHTHORA PALMIVORA |
| Authors: | Y.J. Zhu, S. Ferreira, M.M.M. Fitch, P.H. Moore |
| Keywords: | Systemic acquired resistance (SAR), benzothiadiazole, BTH, Phytophthora palmivora, Carica papaya, pathogenesis-related protein, chitinases, β-1,3-glucanases |
| Abstract:
Phytophthora root-rot and blight (PRB) is one of the more difficult diseases to control in a number of crop species. Since host resistance is often lacking, use of fungicides is the primary method used by growers to control PRB. We report greenhouse studies that show how natural plant defense can be induced by a non-pesticidal chemical, Benzo (1,2,3) thiadiazole-7-carbothioic acid S-methyl ester (BTH), to control PRB on papaya (Carica papaya L.) seedlings. BTH also increased enzyme activity of two pathogenesis-related proteins up to 7X of controls. These results indicate that PR genes are involved in disease resistance of papaya and that chemical induction of SAR has a potential for being used for crop protection. | |
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