Metabolism of fungicide 2-allylphenol in Rhizoctonia cerealis

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• 作者：Tianli Qu^a ; Jinlan Zhang^c ; Zhaoli Meng^a ; Xili Liu^b ; Yongsong Cao^b ; Jianqiang Li^b ; ^{lijq231@cau.edu.cn" class="auth_mail} ; Jianjun J. Hao^d
• 关键词：2-Allylphenol ; Metabolites ; Rhizoctonia cerealis
• 刊名：Ecotoxicology and Environmental Safety
• 出版年：April, 2014
• 年：2014
• 卷：102
• 期：Complete
• 页码：136-141
• 全文大小：770 K

文摘

2-Allylphenol is a biomimetic synthetic fungicide that mimics the compound ginkgol found in gingko fruit (Gingko biloba L.). This systemic fungicide can effectively suppress a wide range of plant diseases, including wheat sharp eyespot (Rhizoctonia cerealis). However, its degradation in environment after application is still unknown. To understand this fungicide degradation, major metabolites of 2-allylphenol in R. cerealis were examined. The parent and metabolites of 2-allylphenol were detected and quantified in the mycelia and liquid medium. Results showed that 2-allylphenol was metabolized and bio-transformed by R. cerealis, and four metabolites were found, including 2-(2-hydroxyphenyl) acetic acid (M1), 2-(2, 3-dihydroxypropyl) phenol (M2), 2-(2-hydroxypropyl)-phenol (M3) and 2-(3-hydroxypropyl)-phenol (M4). Based on the results, we propose that the biodegradation pathway is that 2-allylphenol is rapidly oxidized into metabolite M2 and hydrolyzed into M3 and M4, which formed M2, and carboxylation of M2 to 2-hydroxy-3-(2壮-hydroxyphenyl) propionic acid which undergo hydrolyzation and decarboxylation to form M1. 2-Allylphenol can be bio-transformed to new compounds by R. cerealis, suggesting the existence of microbe metabolic pathways for 2-allylphenol.