ZHANG Qian
College of Natural Resources and Environment, South China Agricultural University;Key laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, Guangzhou 510510, ChinaLI Ping
College of Natural Resources and Environment, South China Agricultural University;Key laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, Guangzhou 510510, ChinaHE Zi-kang
College of Natural Resources and Environment, South China Agricultural University;Key laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, Guangzhou 510510, ChinaYAN Jian
College of Natural Resources and Environment, South China Agricultural University;Key laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, Guangzhou 510510, ChinaTo investigate the diversity of endophytics in medicinal plant Portulaca oleracea and explore potential biological resources to prevent and control crop diseases, the endophytes from its roots, stems and leaves were isolated by medium cultivation method, their bioactivities were evaluated against Ralstonia solanacearum, and they were identified by colonial morphology and ITS sequence. The results showed that the crude extracts of two endophytics Penicillium citrinum and P. polonicum displayed strong activities against the phytopathogen R. solanacearum. One of active metabolite (citrinin) was identified based on UPLC-QTQF-MS. Moreover, the activity of citrinin had more strong antibacterial property than that of streptomycin, which was a common agent in agriculture to prevent bacterial wilt. So, these would provide scientific basis for biological control of bacterial wilt.
张倩,黎平,何子康,颜健.马齿苋内生菌橘青霉和波兰青霉中抗青枯菌的活性物质[J].热带亚热带植物学报,2019,27(6):731~738
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