2017年11月
Elicitor(s) production is involved in red-light-induced resistance during spore germination of Bipolaris oryzae in the presence of host tissues
JOURNAL OF GENERAL PLANT PATHOLOGY
- ,
- ,
- ,
- 巻
- 83
- 号
- 6
- 開始ページ
- 337
- 終了ページ
- 343
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s10327-017-0747-2
- 出版者・発行元
- SPRINGER JAPAN KK
In the present study, the effect of red light on the infection behavior of Bipolaris oryzae on rice leaves and the effects of chemical inhibitors and spore germination fluid (SGF) of B. oryzae on red-light-induced resistance against brown spot disease were investigated. Red light irradiation and natural light did not differ significantly with respect to their effect on spore germination and appressorium formation of B. oryzae 24 h after inoculation. However, formation of infection hyphae was significantly inhibited under red light compared to that under natural light. Pretreatment with the photosynthetic inhibitor 3-(3,4-dichorophenyl)-1,1-dimethylurea (DCMU) or with the aromatic amino acid inhibitor N-(phosphonomethyl) glycine (glyphosate) for 24 h inhibited the development of resistance in rice leaves. To elucidate the elicitor(s) produced during the B. oryzae-rice plant interaction, the effect of SGF prepared in the absence (A-SGF) or presence (P-SGF) of rice leaves on red-light-induced resistance was investigated. When rice plants were pretreated with A-SGF or P-SGF for 24 h, P-SGF had elicitor activity under red light, but not under natural light or with A-SGF. These results suggest that germinating spore of B. oryzae produced an elicitor(s) under red light conditions in a host-dependent manner. In conclusion, we hypothesize that an unidentified elicitor(s) produced at an early stage of fungal infection during the B. oryzae-rice interaction contributes to the inhibition of cell death in rice leaves under red light and enhances resistance-related tryptophan and phenylpropanoid pathways.
- リンク情報
- ID情報
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- DOI : 10.1007/s10327-017-0747-2
- ISSN : 1345-2630
- eISSN : 1610-739X
- Web of Science ID : WOS:000413449900001