| Title | The NADPH oxidase AoNoxA in Arthrobotrys oligospora functions as an initial factor in the infection of Caenorhabditis elegans |
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| Author | Xin Li1,2, Ying-Qian Kang3, Yan-Lu Luo1, Ke-Qin Zhang1, Cheng-Gang Zou1*, and Lian-Ming Liang1* |
| Address | 1State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, Yunnan 650091, P. R. China, 2Key Laboratory of Stem Cells and Regenerative Medicine, Institute of Molecular and Clinical Medicine, Kunming Medical University, Kunming, Yunnan 650500, P. R. China, 3Department of Microbiology, Guizhou Medical University, Guiyang, Guizhou 550025, P. R. China |
| Bibliography | Journal of Microbiology, 55(11),885–891, 2017, |
| DOI | 10.1007/s12275-017-7169-x |
| Key Words | NADPH oxidase, nematode-trapping fungi, trap formation, reactive oxygen species |
| Abstract | Reactive oxygen species (ROS) produced by NADPH oxidases can serve as signaling molecules to regulate a variety of physiological processes in multi-cellular organisms. In the nematophagous fungus Arthrobotrys oligospora, we found that ROS were produced during conidial germination, hyphal extension, and trap formation in the presence of nematodes. Generation of an AoNoxA knockout strain demonstrated the crucial role of NADPH oxidase in the production of ROS in A. oligospora, with trap formation impaired in the AoNoxA mutant, even in the presence of the nematode host. In addition, the expression of virulence factor serine protease P186 was up-regulated in the wild-type strain, but not in the mutant strain, in the presence of Caenorhabditis elegans. These results indicate that ROS derived from AoNoxA are essential for full virulence of A. oligospora in nematodes. |