Pn-AMPs, the hevein-like proteins from Pharbitis nil confers disease resistance against phytopathogenic fungi in tomato, Lycopersicum esculentum
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- Pn-AMPs, the hevein-like proteins from Pharbitis nil confers disease resistance against phytopathogenic fungi in tomato, Lycopersicum esculentum
- Lee, OS; Lee, B; Park, N; Koo, JC; Kim, YH; Prasad, T; Karigar, C; Chun, HJ; Jeong, BR; Kim, DH; Nam, J; Yun, JG; Kwak, SS; Cho, Moo Je; Yun, DJ
- Antifungal activity; Convolvulaceae; Fungal resistance; Hevein-like proteins; Lycopersicon esculentum; Pharbitis nil; Pn-AMP; Solanaceae
- Issue Date
- PERGAMON-ELSEVIER SCIENCE LTD
- PHYTOCHEMISTRY, v.62, no.7, pp.1073 - 1079
- The antifungal activity of hevein-like proteins has been associated with their chitin-binding activities. Pn-AMP1 and Pn-AMP2, two hevein homologues from Pharbitis nil, show in vitro antifungal activities against both chitin and non-chitin containing fungi. Purified Pn-AMPs retained antifungal activities only under non-reducing conditions. When Pn-AMP2 cDNA was constitutively expressed in tomato (Lycopersicon esculentum) plants under the control of CaMV35S promoter, the transgenic plants showed enhanced resistance against both the non-chitinous fungus Phytophthora capsici, and the chitin-containing fungus Fusarium oxysporum. Thus, the chitin component in the fungal cell wall is not an absolute requirement for Pn-AMP's antifungal activities. These results when considered together suggest that Pn-AMPs have the potential for developing transgenic plants resistant to a wide range of phytopathogenic fungi.
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