| Title: | Inhibitory Effects of Phenazine Compounds and Volatile Organic Compounds Produced by Pseudomonas aurantiaca ST-TJ4 Against Phytophthora cinnamomi |
| Author(s): | Zhang Y; Kong WL; Wu XQ; Li PS; |
| Address: | "Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China. Jiangsu Key Laboratory for Prevention and Management of Invasive Species, Nanjing Forestry University, Nanjing 210037, China" |
| DOI: | 10.1094/PHYTO-10-21-0442-R |
| ISSN/ISBN: | 0031-949X (Print) 0031-949X (Linking) |
| Abstract: | "Phytophthora cinnamomi is an important plant pathogen that is widely distributed worldwide and has caused serious ecological damage and significant economic losses in forests and plantations in many countries. The use of plant growth-promoting rhizobacteria is an effective and environmentally friendly strategy for controlling diseases caused by P. cinnamomi. In this study, we investigated the antagonistic mechanism of Pseudomonas aurantiaca ST-TJ4 against P. cinnamomi through different antagonistic approaches, observations of mycelial morphology, study of mycelial metabolism, and identification of antagonistic substances. The results showed that Pseudomonas aurantiaca ST-TJ4 was able to significantly inhibit mycelial growth, causing mycelial deformation and disrupting internal cell structures. Additionally, pathogen cell membranes were damaged by ST-TJ4, and mycelial cell content synthesis was disrupted. Ultraperformance liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry analyses showed that phenazine compounds and 2-undecanone were the main antagonistic components. The ammonia produced by the ST-TJ4 strain also contributed to the inhibition of the growth of P. cinnamomi. In conclusion, our results confirm that Pseudomonas aurantiaca ST-TJ4 can inhibit P. cinnamomi through multiple mechanisms and can be used as a biological control agent for various plant diseases caused by P. cinnamomi" |
| Keywords: | Phenazines/metabolism/pharmacology *Phytophthora Plant Diseases/microbiology/prevention & control Pseudomonas *Volatile Organic Compounds/metabolism/pharmacology Phytophthora cinnamomi Pseudomonas aurantiaca biocontrol agent phenazines volatile; |
| Notes: | "MedlineZhang, Yu Kong, Wei-Liang Wu, Xiao-Qin Li, Pu-Sheng eng 2022/03/10 Phytopathology. 2022 Sep; 112(9):1867-1876. doi: 10.1094/PHYTO-10-21-0442-R. Epub 2022 Jul 29" |
