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Daigo Takemoto
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Biochemistry, Genetics & Molecular Biology Environmental Science

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NON-HOST RESISTANCE ACTIVITIES OF Arabidopsis thaliana INDUCED BY METHANOL EXTRACT OF MYCELIA FROM Phytophthora infestans Mohammad Shahjahan Monjil; Shinya Wada; Daigo Takemoto; Kazuhito Kawakita
International Journal of Biosciences and Biotechnology Vol 1 No 2 (2013)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

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Abstract

Defense system of a non-host pathosystem involving the model plant Arabidopsis thaliana and methanolextract of mycelia (MEM) elicitor from Phytophthora infestans are presented in this article. A. thaliana leaveswere analyzed for the induction of reactive oxygen species (ROS), hypersensitive reaction (HR) like celldeath as well as defense gene expression by MEM elicitor. MEM elicitor induced O2¯ generation in A.thaliana leaves with dose dependent nature. HR occurred during the elicitation of A. thaliana challengedwith MEM elicitor. Responses of intact A thaliana seedlings to MEM elicitor caused the retardation of growthof seedlings. Both plant biomass and growth of primary roots was markedly reduced by the treatment ofMEM. MEM elicitor induced the expression of defense genes such as pathogenesis related proteins, PR1,PR2, PR4 and PR5, and rbohF encoding a ROS generation. These results suggested that MEM elicitor inducednon-host defense responses in A. thaliana.
THE WATER EXTRACT OF Saragassum fusiforme IS A POTENTIAL ELICITOR OF INDUCED RESISTANCE IN SOLANUM LYCOPERSICUM BUT NOT IN Nicotiana benthamiana Layth Sbaihat; Daigo Takemoto; Kazuhito Kawakita
International Journal of Biosciences and Biotechnology Vol 2 No 1 (2014)
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University in cooperation with Asia-Oceania Bioscience and Biotechnology Consortium (AOBBC)

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Abstract

Molecules called elicitors induce plants’ defense responses.Elicitor -­??induced resistance rarely leads tocomplete pathogen control, but reduce lesion size and/or number instead. We investigated a novel elicitorextractedfrom the brown sea algae (Saragassum fusiforme), whichis sowed to induce reactive oxygen speciesproduction and protection against powdery mildew and late blight diseasesoftomato (Solanum lycopersicum,cultivar Lady First)plants. On the other hand, the studied elicitor did not induce reactive oxygen speciesproduction in Nicotiana benthamiana plants nor protected them against late blight disease .
Co-Authors Kazuhito Kawakita Layth Sbaihat Mohammad Shahjahan Monjil Shinya Wada