Journal
JOURNAL OF GENERAL PLANT PATHOLOGY
Volume 77, Issue 2, Pages 85-92Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s10327-010-0290-x
Keywords
Plant lectin; SalT; Magnaporthe oryzae; Disease resistance; Mannose-binding rice lectin
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Funding
- Grants-in-Aid for Scientific Research [20380026] Funding Source: KAKEN
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Mannose-binding rice lectin (MRL), which is almost identical to the salt-induced protein SalT, binds to mannose and glucose residues. Expression of the MRL gene in response to infection with Magnaporthe oryzae, the rice blast fungus, was stronger in the incompatible interaction than in the compatible. Transgenic rice plants that constitutively over-expressed MRL strongly suppressed the growth of invasive hyphae of the fungus on leaf sheaths and the development of typical susceptible-type lesions on leaf blades, but did not affect penetration by the fungus in comparison with the wild-type. On a polycarbonate plate, purified recombinant MRL inhibited conidial attachment and appressorium formation but not conidial germination. These results suggest that MRL may play an essential role in disease resistance by suppressing development of M. oryzae in situ.
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