| Title: | Fungal endophyte Phomopsis liquidambari biodegrades soil resveratrol: a potential allelochemical in peanut monocropping systems |
| Author(s): | Wang HW; Sun K; Guan YX; Qiu MH; Zhang L; Dai CC; |
| Address: | "Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China. Soil Quality Protection and Environmental Monitoring Station of Jiangsu Province, Nanjing, China" |
| ISSN/ISBN: | 1097-0010 (Electronic) 0022-5142 (Linking) |
| Abstract: | "BACKGROUND: Most allelochemicals are secondary products released from root excretions or plant residues that accumulate in continuous cropping systems and cause severe decline in peanut yield. Resveratrol is a plant-derived stilbene that is released from peanut residues and accumulates in the soil; however, its allelopathic effects on peanut production are overlooked. Effective management solutions need to be developed to relieve allelopathy caused by soil resveratrol. Here, the biodegradation of resveratrol by the fungal endophyte Phomopsis liquidambari was investigated in a mineral salt medium and a soil trial. Resveratrol and its metabolites (produced by degradation by P. liquidambari) were detected by high-performance liquid chromatography-mass spectrometry (HPLC-MS). RESULTS: Resveratrol released from peanut residues reached a maximum concentration of 0.18 mug g(-1) soil in litterbag experiments. Exogenous resveratrol inhibited peanut growth, nodule formation, and soil dehydrogenase activity, and reduced the soil microbial biomass carbon content and bacterial abundance, indicating an allelopathic role in peanut growth. More than 97% of the resveratrol was degraded within 72 and 168 h by P. liquidambari in pure culture and soil conditions, respectively. Resveratrol was first cleaved to 3,5-dihydroxybenzaldehyde and 4-hydroxybenzaldehyde, which were subsequently oxidized into 3,5-dihydroxybenzoic acid and 4-hydroxybenzoic acid, respectively. Fungal resveratrol cleavage oxygenase and the related gene expression were enhanced when P. liquidambari was induced by the resveratrol during the incubation. CONCLUSION: Our results indicate that the practical application of the fungal endophyte P. liquidambari has strong potential for biodegrading soil resveratrol, which can cause allelopathy in peanut continuous cropping systems. (c) 2019 Society of Chemical Industry" |
| Keywords: | "Arachis/*chemistry/metabolism/microbiology Ascomycota/*metabolism Bacteria/classification/drug effects/genetics/isolation & purification Biodegradation, Environmental Endophytes/*metabolism Pheromones/analysis/*metabolism/pharmacology Resveratrol/analysis;" |
| Notes: | "MedlineWang, Hong-Wei Sun, Kai Guan, Yong-Xiang Qiu, Mei-Hua Zhang, Li Dai, Chuan-Chao eng BE2016391/Key R&D Program of Jiangsu Province (Modern Agriculture)/ 31870478/National Natural Science Foundation of China/ Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions of China/ England 2019/06/22 J Sci Food Agric. 2019 Oct; 99(13):5899-5909. doi: 10.1002/jsfa.9865. Epub 2019 Jul 12" |
