Tryptamine accumulation in Sekiguchi lesion mutant of rice [Oryza sativa] infected with Bipolaris oryzae
2005
Ueno, M.(Shimane Univ., Matsue (Japan). Faculty of Life and Environmental Science) | Imaoka, A. | Kihara, J. | Arase, S.
The effects of indole-related compounds on infection behaviors of Bipolaris oryzae in onion epidermal cells were investigated. Tryptamine inhibited dose-dependently all stages of the infection behavior such as spore germination and infection-hypha formation. Furthermore, antifungal activity of some indole-related compounds to B. oryzae was investigated on the TLC plate. As the result, in the indolyl-3-butryric acid and indole-3-acetnitrile, the larger size growth inhibition zone of B. oryzae was observed in comparison to the tryptamine, oxindole, gramine, indole, indole-3-acetic acid and indole-3-acetamide. However, in the tryptophan, growth inhibition zone of B. oryzae was not observed on the TLC plate. These results suggested that accumulation of high levels of tryptamine or some indole-related compounds might be utilizable to protect with fungal disease by B. oryzae.
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