Yin Miaomiao, Fasoyin Opemipo Esther, Wang Chen, Yue Qun, Zhang Yunyun, Dun Baoqing, Xu Yuquan, Zhang Liwen
Biotechnology Research Institute, The Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.
Institute of Crop Sciences, The Chinese Academy of Agricultural Sciences, 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.
AMB Express. 2020 Jul 1;10(1):118. doi: 10.1186/s13568-020-01055-x.
Herbicides are important tools for weed control in modern agriculture. In the search for potential herbicidal natural products from fungal species, harzianum A and B were identified from the biofertilizer fungus, Trichoderma brevicompactum. In the phytotoxicity assays on the dicot species Brassica chinensis, harzianum A and B reduced both shoot and root lengths at low concentrations and inhibited the seed germination at 2 μg mL. In addition, harzianum A and B also exhibited phytotoxicity against monocots, Oryza sativa L. cv. Nipponbare and Echinochloa crusgalli L. Beauv.. Compared with a common herbicide, 2,4-dichlorophenoxyacetic acid, harzianum A and B performed similar activity in a pot assay, and were more effective in post-emergence than pre-emergence conditions. Harzianum A and B have potential as efficient herbicide for controlling important dicotyledon and monocotyledon weeds at low concentrations. They can be sprayed in liquid form in both pre- and post-emergence conditions. Our results confirmed the importance of these molecules for the development of new herbicides.
除草剂是现代农业中控制杂草的重要工具。在从真菌物种中寻找潜在的除草天然产物的过程中，从生物肥料真菌短密木霉中鉴定出了哈茨木霉A和B。在对双子叶植物小白菜进行的植物毒性试验中，低浓度的哈茨木霉A和B降低了地上部和根部的长度，并在2μg/mL时抑制了种子萌发。此外，哈茨木霉A和B对单子叶植物水稻品种日本晴和稗草也表现出植物毒性。与常见除草剂2,4-二氯苯氧乙酸相比，哈茨木霉A和B在盆栽试验中表现出相似的活性，且在苗后条件下比苗前条件下更有效。哈茨木霉A和B有潜力作为高效除草剂，在低浓度下控制重要的双子叶和单子叶杂草。它们可以在苗前和苗后条件下以液体形式喷洒。我们的结果证实了这些分子对开发新型除草剂的重要性。
