文献类型： 外文期刊
作者： Zhu, Jia-Nan 1 ; Yu, Yi-Jun 2 ; Dai, Meng-Di 3 ; Zeng, Yu-Lan 1 ; Lu, Xuan-Jun 1 ; Wang, Ling 1 ; Liu, Xiao-Hong 1 ; Su, Zhen-Zhu 1 ; Lin, Fu-Cheng 3 ;
作者机构： 1.Zhejiang Univ, Inst Biotechnol, State Key Lab Managing Biot & Chem Treats Qual, Hangzhou, Peoples R China
2.Dept Agr & Rural Zhejiang Prov, Hangzhou, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, State Key Lab Managing Biot & Chem Treats Qual, Hangzhou, Peoples R China
关键词： endophytic fungi; Pseudophialophora; symbiosis; growth promotion; disease resistance
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）
ISSN：
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Wild rice (Oryza granulata) is a natural resource pool containing abundant unknown endophytic fungi species. There are few reports on the endophytic fungi in wild rice. Here, one isolate recovered from wild rice roots was identified as a new species Pseudophialophora oryzae sp. nov based on the molecular phylogeny and morphological characteristics. Fluorescent protein-expressing P. oryzae was used to monitor the fungal colonization pattern. Hyphae invaded the epidermis to the inner cortex but not into the root stele. The inoculation of P. oryzae promoted the rice growth, with the growth parameters of chlorophyll content, shoot height, root length, fresh shoot weight, fresh root weight and dry weight increasing by 24.10, 35.32, 19.35, 90.00, 33.3, and 79.17%, respectively. P. oryzae induced up-regulation of nitrate transporter OsPTR9 and potassium transporter OsHAK16 by 7.28 +/- 0.84 and 2.57 +/- 0.80 folds, promoting nitrogen and potassium elements absorption. In addition, P. oryzae also conferred a systemic resistance against rice blast, showing a 72.65 and 75.63% control rate in sterile plates and potting conditions. This systemic resistance was mediated by the strongly up-regulated expression of resistance-related genes NAC, OsSAUR2, OsWRKY71, EL5, and PR1 alpha. Since P. oryzae can promote rice growth, biomass and induce systemic disease resistance, it can be further developed as a new biogenic agent for agricultural production, providing a new approach for biocontrol of rice blast.
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