Ustilaginoidea virens

Rice piant pathogenic fungi Ustilaginoidea virens... 

Rice plant pathogenic fungi Ustilaginoidea Virens... 

Lectotype species Ustilaginoidea virens (Cooke) Takahashi. 

In MS, Nou TH, Yu SH. Studies on the formation and germination of sclerotia of Ustilaginoidea virens. Res Rep Off Rural Dev Soil Fert Crop Protect Mycol Farm Prod Util Suweon 26 69-71, 1984. 

Mulder JL, Holliday P. Ustilaginoidea virens. CMI Desc Pathogenic Fungi Bacteria 299, 1971. 

Type species Ustilaginoidea virens (Cooke) Takah. = Ustilago virens Cooke = Sphacelotheca virens (Cooke) Omori = Tilletia oryzae (Cooke) Pat. = Ustilaginoidea oryzae (Cooke) Brefeld = Tilletia oryzae (Cooke) Pat. 

Hashioka Y, Yoshino M, Yamamoto T. Physiology of the rice false smut, Ustilaginoidea virens (Cke) Tak Res Bull Saitama Agric Exp Sta 2 20, 1951. 

The ustiloxins, isolated from the fungus Ustilaginoidea virens associated with rice plants, show antimitotic properties by inhibiting microtubule formation (7S0, 781). Structurally, they are characterized by the presence of two peptide bonds and one tmusual tertiary alkyl-aryl ether connection. The first total synthesis of ustiloxin D (1205) was achieved in 2002 (782) by Joullie et al., followed by a shorter synthesis by Wandless et al. (783, 784). Later on, its synthesis was conducted again (785) along with ustiloxin F (1206) (786) in a more convergent manner than previously by Joullie et al. (Scheme 15.2). 

Cyclic peptide. Isol. from the false smut balls caused by Ustilaginoidea virens on rice. Powder. 

Isol. from the false smut balls caused by Ustilaginoidea virens on rice. Powder. Struct, not detd. due to lack of material. Poss. metab. of Ustiloxin A, U-10015. 

Ustilaginoidea species cause false smut diseases on various grasses, including rice and maize. Their parasitism of the host s ovaries and the formation of a sclerotium-like structure recalls species of Claviceps (Sphacelia anamorphs). The dark, roughened conidia are unique for the family Clavicipitaceae, and closely resemble teliospores of true smuts in the order Ustilaginales, with which they have often been confused. About 20 species have been reported almost all are very poorly known. The best known is U. virens, cause of an economically important false smut of rice, but few details of its life history have been studied (Mulder and Holliday, 1971 In et al., 1984 Fujita et al., 1989). 

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