Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan.
Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan.
Can J Microbiol. 2020 May;66(5):368-376. doi: 10.1139/cjm-2019-0427. Epub 2020 Feb 10.
Conventional weed control methods often have environmental impact. The present study was conducted to screen selected accessions of for both potential biocontrol of and and potential concurrent growth promotion of wheat. The four strains (B11, T19, T24, and T75) were found positive for cyanide production, siderophore production, phosphorus solubilization, oxidase activity, catalase activity, and ACC deaminase activity in vitro. These strains were phytotoxic, causing up to 73.3% mortality in the lettuce seedling bioassay. Consortia of compatible strains increased and seedling mortality up to 50.0% and 56.7%, respectively, and reduced root length up to 73.8% and 53.9%, respectively, as compared with the uninoculated control. Consortia of compatible strains increased wheat shoot length, root length, fresh biomass, dry biomass, and leaf greenness up to 41.6%, 100%, 79.9%, 81.5%, and 21.1%, respectively, over the uninoculated control. Four of the 11 consortia tested expressed good weed suppression and wheat growth promotion capacity and deserve further experimentation. The findings from this study may lead to the formulation of bioherbicides that will improve human and environmental health.
传统的杂草控制方法往往对环境有影响。本研究旨在筛选 用于潜在的生物防治 和 以及与小麦的潜在协同生长促进的选定品系。发现四种 菌株（B11、T19、T24 和 T75）在体外具有氰化物产生、铁载体产生、磷溶解、氧化酶活性、过氧化氢酶活性和 ACC 脱氨酶活性。这些菌株具有植物毒性，在生菜幼苗生物测定中导致高达 73.3%的死亡率。相容 菌株的共生体将 和 幼苗死亡率分别提高至 50.0%和 56.7%，并将根长分别降低至 73.8%和 53.9%，与未接种对照相比。相容 菌株的共生体将小麦地上部分长度、根长、鲜生物量、干生物量和叶片绿色度分别提高至 41.6%、100%、79.9%、81.5%和 21.1%，与未接种对照相比。在测试的 11 个 共生体中有 4 个表现出良好的杂草抑制和小麦生长促进能力，值得进一步试验。本研究的结果可能会导致生物除草剂的制定，从而改善人类和环境健康。
