文献类型： 外文期刊
作者： Dong, Kaili 1 ; Xu, Chuan 1 ; Kotta-Loizou, Ioly 5 ; Jiang, Jingjing 1 ; Lv, Ruiying 1 ; Kong, Linghong 1 ; Li, Shifang 7 ; Hong, Ni 2 ; Wang, Guoping 2 ; Coutts, Robert H. A. 6 ; Xu, Wenxing 1 ;
作者机构： 1.Hubei Hongshan Lab, Wuhan 430070, Hubei, Peoples R China
2.Minist Agr, Key Lab Hort Crop Fruit Trees Biol & Germplasm Cre, Wuhan 430070, Hubei, Peoples R China
3.Key Lab Plant Pathol Hubei Prov, Wuhan 430070, Hubei, Peoples R China
4.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China
5.Imperial Coll London, Fac Nat Sci, Dept Life Sci, London SW7 2AZ, England
6.Univ Hertfordshire, Sch Life & Med Sci, Dept Clin Pharmaceut & Biol Sci, Hatfield AL10 9AB, England
7.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Xueyuan Rd, Haikou 571101, Hainan, Peoples R China
8.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
关键词： circular RNA; fungus; mycoviroid; viroid; viroid-like
期刊名称：ADVANCED SCIENCE （ 影响因子：17.521； 五年影响因子：18.939 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： To date, viroids have been found to naturally infect only plants, resulting in substantial losses for some crops. Whether viroids or viroid-like RNAs naturally infect non-plant hosts remains unknown. Here the existence of a set of exogenous, single-stranded circular RNAs, ranging in size from 157 to 450 nucleotides, isolated from the fungus Botryosphaeria dothidea and nominated B. dothidea RNAs (BdcRNAs) is reported. BdcRNAs replicate autonomously in the nucleus via a rolling-circle mechanism following a symmetric pathway. BdcRNA infection induces symptoms, because BdcRNAs can apparently modulate, to different degrees, specific biological traits (e.g., alter morphology, decrease growth rate, attenuate virulence, and increase or decrease tolerance to osmotic and oxidative stress) of the host fungus. Overall, BdcRNAs have genome characteristics similar to those of viroids and exhibit pathogenic effects on fungal hosts. It is proposed that these novel fungus infecting RNAs should be termed mycoviroids. BdcRNA(s) may be considered additional inhabitants at the frontier of life in terms of genomic complexity, and represent a new class of acellular entities endowed with regulatory functions, and novel epigenomic carriers of biological information.
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