Results 11 to 20 of about 169 (90)

The histone deacetylase UvHOS2 regulates vegetative growth, conidiation, ustilaginoidin synthesis, and pathogenicity in Ustilaginoidea virens

Phytopathology Research
Ustilaginoidea virens causes rice false smut, one of the most devastating rice diseases. The pathogen produces various types of mycotoxins, such as ustilaginoidins and ustiloxins, which are harmful to both human and animal health. Histone deacetylases in
Wenxian Sun, Cui Yang, Sun Wenxian
exaly   +4 more sources

Elucidation of ustilaginoidin biosynthesis reveals a previously unrecognised class of ene-reductases [PDF]

Chemical Science, 2021
The 2,3-double bond reduction of the pyrenone ring in linear naphtho-γ-pyrenones was catalyzed by a phospholipid methyltransferase-like enzyme, namely UsgR, which is a previously unrecognised class of ene-reductases.
Jinrong Xu, You-Liang Peng, Daowan Lai   +2 more
exaly   +5 more sources

Determination of the absolute configurations of the stereogenic centers of ustilaginoidins by studying the biosynthetic monomers from a gene knockout mutant of Villosiclava virens [PDF]

Scientific Reports, 2019
AbstractUstilaginoidins are a kind of mycotoxins with 9,9′-linked bis-naphtho-γ-pyrones structures produced by the rice false smut pathogen Villosiclava virens. These metabolites displayed a wide range of bioactivities, such as teratogenic, cytotoxic, phytotoxic, and antibacterial activities. So far 26 ustilaginoidins have been isolated from V. virens,
Jinrong Xu, Daowan Lai, Huiquan Liu
exaly   +5 more sources

Metabolic Products of Fungi. XXIII. On Ustilaginoidins. (3). The Structures of Ustilaginoidins B and C.

Chemical and Pharmaceutical Bulletin, 1963
The structures of ustilaginoidin B, C28H18O11, m.p. >300°, [α]25D-360°(dioxan) and ustilaginoidin C, C28H18O12, m.p. >300°, [α]25D-260°(dioxan) which were isolated as the pigments of Ustilaginoidea virens (COOKE) TAKAHASHI, were studied mostly by the NMR spectral analyses of their peracetates to conclude as being formulated as II (R=H) and III (R=H ...
Shibata, Shoji, Ogihara, Yukio
openaire   +4 more sources

Metabolic Products of Fungi. XXI. On Ustilaginoidins. (1). The Reactions of Ustilaginoidin A.

Chemical and Pharmaceutical Bulletin, 1963
An orange red pigment, ustilaginoidin A, C28H18O10, m.p. >300°, [α]D -384° (dioxane), was isolated from false the smutted ball growing on rice spike. It has been shown that ustilaginoidin A possesses two hindered and four unhindered hydroxyls giving tetraacetate, tetrabenzoate, and hexamethyl ether.
Shibata, Shoji, Ohta, Akihiro, Ogihara, Yukio   +2 more
openaire   +4 more sources

Calcineurin-dependent transcription factor CRZ1, an important pathogenicity factor in Ustilaginoidea virens, directly regulates ustilaginoidin biosynthesis

Phytopathology Research
Ustilaginoidea virens, the causal agent of rice false smut, produces a variety of mycotoxins, including ustilaginoidins, which are highly toxic and harmful to humans and animals.
Chunxiang Zhou, Zijun Yang, Dayong Li, Yang Mei, Xiaobing Wu, Guohua Duan, Jing Sun, Maozhu Jiang, Cheng Liu, Yun Liu, Wenxian Sun, Cui Yang   +11 more
doaj   +4 more sources

Ustiloxins and Ustilaginoidins in the Sclerotia Generated from Rice False Smut Balls and Their Contents

Toxins
Rice false smut (RFS) caused by the ascomycete Ustilaginoidea virens (teleomorph: Villosiclava virens) is a destructive fungal disease all over the world. The RFS balls are ball-like colonies transformed from individual grains through the infection of U.
Dan Xu, Xuwen Hou, Liyao Liu, Xingyi Luo, Pengfei Wang, Jiankun Miao, Hai Dong, Daowan Lai, Ligang Zhou   +8 more
doaj   +2 more sources

New Ustilaginoidins from Rice False Smut Balls Caused by Villosiclava virens and Their Phytotoxic and Cytotoxic Activities

Journal of Agricultural and Food Chemistry, 2017
Ustilaginoidins are a class of bis-naphtho-γ-pyrones, typically produced by Villosiclava virens, the pathogen of the rice false smut (RFS), which has been one of the most destructive rice fungal diseases. Previously, we found that ustilaginoidins identified from the culture of V.
Weibo Sun, Ali Wang, Dan Xu, Weixuan Wang, Jiajia Meng, Jungui Dai, Yang Liu, Daowan Lai, Ligang Zhou   +8 more
openaire   +3 more sources

A Genome-Wide Comparison of Rice False Smut Fungus Villosiclava virens Albino Strain LN02 Reveals the Genetic Diversity of Secondary Metabolites and the Cause of Albinism. [PDF]

Int J Mol Sci, 2023
Rice false smut (RFS) caused by Villosiclava virens (anamorph: Ustilaginoidea virens) has become one of the most destructive fungal diseases to decrease the yield and quality of rice grains.
Xue M, Zhao S, Gu G, Xu D, Zhang X, Hou X, Miao J, Dong H, Hu D, Lai D, Zhou L.   +10 more
europepmc   +2 more sources

False smut of rice: a menace to rice seed production in Nepal

Cogent Food and Agriculture
The rice seed market in Nepal is worth more than NRs. 600 million, with an annual demand of 20,000 tons. Rice seed production is threatened by False smut disease, caused by Ustilaginoidea virens.
Pratishtha Adhikari
exaly   +3 more sources