01687naa a2200193 a 450000100080000000500110000800800410001910000180006024501010007826000090017952010320018865300210122065300190124165300160126065300330127670000150130970000210132477301480134511266122017-09-05       2017    bl uuuu     u00u1 u    #d1 aHAWERROTH, C.  aINFECTION PROCESS OF Gaeumannomyces graminis var. graminis ON RICE ROOTS.h[electronic resource]  c2017  aCrown sheath rot, caused by the ascomycete Gaeumannomyces graminis var. graminis, infects the roots and the base of the culm of rice plants and causes early grains maturation, the death of the tillers and reduced yield. Considering the little information for the interaction rice-G. graminis var. graminis at the microscopical level, this study aimed to gain novel insights regarding the infection process of this soilborne pathogen on the roots of rice plants by using both light and scanning electron microscopy. The fungus initially colonized the epidermal, exodermal and sclerenchyma cells. At 15 days after inoculation (dai), prominent fungal hyphae colonized the cortex as well as clusters of perithecia were noticed into the roots. At 20 dai, the fungus reached the central cylinder. The results of this study provide new insights into the infection process of G. graminis var. graminis on rice roots and may contribute to the development of more effective control measures to reduce the crown sheath rot in rice fields.  aCrown sheath rot  aOryza sativa L  aPerithecium  aScanning electron microscopy1 aARAUJO, L.1 aRODRIGUES, F. A.  tIn: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 50., 2017, Uberlândia, MG. Resumos... Brasília: Sociedade Brasileira de Fitopatologia, 2017. p. 35