2, 6‐Dimethoxy‐1, 4‐Benzoquinone Enhances Resistance Against the Rice Blast Fungus Magnaporthe oryzae. Issue 11 (1st April 2014)

• Record Type: Journal Article
• Authors: Ueno, Makoto; Yoshikiyo, Keisuke
• Is Part Of: Journal of phytopathology. Volume 162:Issue 11/12(2014:Dec.)
• Page Start: 731
• Page End: 736
• Publication Date: 2014-04-01
• Subjects: Plant diseases -- Periodicals; 632
• DOI: 10.1111/jph.12253
• Languages: English
• ISSNs: 0931-1785

Abstract

<abstract abstract-type="main" id="jph12253-abs-0001"> <title>Abstract</title> <p>We investigated the effect of 2, 6‐dimethoxy‐1, 4‐benzoquinone (DMBQ) on induced resistance to <italic>Magnaporthe oryzae</italic> in rice. DMBQ concentrations greater than 50 <italic>μ</italic>g/ml inhibited spore germination and appressorium formation in <italic>M. oryzae</italic>. When rice leaves pretreated with 10 <italic>μ</italic>g/ml DMBQ, which did not show antifungal activity against spore germination and appressorium formation of <italic>M. oryzae</italic>, were inoculated with <italic>M. oryzae</italic> spores 5 days after DMBQ pretreatment, blast lesion formation was inhibited compared with control leaves pretreated with distilled water. In addition, infection‐inhibiting activity against <italic>M. oryzae</italic> was significantly enhanced in rice leaf sheaths pretreated with 10 <italic>μ</italic>g/ml DMBQ. H₂O₂ generation was observed in rice leaves pretreated with DMBQ, and <italic>PAL</italic>, <italic> POX</italic>, <italic> CHS</italic> and <italic>PR10a</italic> were significantly expressed in these leaves. These results suggested that DMBQ can protect rice from blast disease caused by <italic>M. oryzae</italic>.</p> </abstract>