A gamma-ray-induced rice mutant, M1009, which spontaneously forms brown specks on leaves was isolated. In appearance, these lesions very much resemble those that are produced during the hypersensitive resistance response of rice to pathogens. A similar phenotype has been associated with a number of mutants in maize or Arabidopsis, which have been briefly categorized as disease lesion mimics. Brown speck formation was suppressed at temperatures of 25°C and above, and was severe at 20°C. Light irradiation is also required to initiate brown specks. In addition, the mutant exhibits heightened resistance to two major fungal pathogens of rice, Magnaporthe grisea and Cochliobolus miyabeanus. Genetic characterization of the mutant has indicated that its les-bs (lesion-brown speck) phenotype segregates as a monogenic recessive mutation.
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Similar content being viewed by others Explore related subjectsDiscover the latest articles and news from researchers in related subjects, suggested using machine learning. Author information Authors and AffiliationsFaculty of Life and Environmental Science, Shimane University, Matsue 690-8504, Japan, , , , , , JP
Sakae ARASE
Faculty of Agriculture, Department of Life Sciences, Kagawa University, Miki, Kagawa 761-0795, Japan, , , , , , JP
Chang-Min ZHAO, Kazuya AKIMITSU & Masahiko ICHII
Faculty of Agriculture, Okayama University, Tsushima-Naka, Okayama 700-8530, Japan, , , , , , JP
Mikihiro YAMAMOTO
Received 13 September 1999/ Accepted in revised form 15 December 1999
About this article Cite this articleARASE, S., ZHAO, CM., AKIMITSU, K. et al. A Recessive Lesion Mimic Mutant of Rice with Elevated Resistance to Fungal Pathogens. J Gen Plant Pathol 66, 109–116 (2000). https://doi.org/10.1007/PL00012930
Issue Date: May 2000
DOI: https://doi.org/10.1007/PL00012930
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