Santos Mariana S, Rondina Artur B L, Nogueira Marco A, Hungria Mariangela
Embrapa Soja, C.P. 231, Londrina, 86001-970 Paraná, Brazil.
Department of Biochemistry and Biotechnology, State University of Londrina, C.P. 10.011, Londrina, 86057-970 Paraná, Brazil.
Int J Microbiol. 2020 Jul 10;2020:8833879. doi: 10.1155/2020/8833879. eCollection 2020.
Seed treatment with chemical pesticides is commonly used as an initial plant protection procedure against pests and diseases. However, the use of such chemicals may impair the survival and performance of beneficial microorganisms introduced via inoculants, such as the plant growth-promoting bacterium . We assessed the compatibility between the most common pesticide used in Brazil for the treatment of maize seeds, composed of two fungicides, and one insecticide, with the commercial strains Ab-V5 and Ab-V6 of , and evaluated the impacts on initial plant development. The toxicity of the pesticide to was confirmed, with an increase in cell mortality after only 24 hours of exposure . Seed germination and seedling growth were not affected neither by the nor by the pesticide. However, under greenhouse conditions, the pesticide affected root volume and dry weight and root-hair incidence, but the toxicity was alleviated by the inoculation with for the root volume and root-hair incidence parameters. In maize seeds inoculated with , the pesticide negatively affected the number of branches, root-hair incidence, and root-hair length. Therefore, new inoculant formulations with cell protectors and the development of compatible pesticides should be searched to guarantee the benefits of inoculation with plant growth-promoting bacteria.
用化学农药进行种子处理是一种常用的针对病虫害的初始植物保护措施。然而，这类化学物质的使用可能会损害通过接种剂引入的有益微生物的存活和性能，比如促进植物生长的细菌。我们评估了巴西用于处理玉米种子的最常见农药（由两种杀菌剂和一种杀虫剂组成）与商业菌株Ab-V5和Ab-V6之间的兼容性，并评估了其对植物初期发育的影响。证实了该农药对[具体细菌名称未给出]具有毒性，仅暴露24小时后细胞死亡率就有所增加。种子发芽和幼苗生长既未受到[具体细菌名称未给出]的影响，也未受到农药的影响。然而，在温室条件下，该农药影响根体积、干重和根毛发生率，但接种[具体细菌名称未给出]后，对于根体积和根毛发生率参数，毒性有所减轻。在接种了[具体细菌名称未给出]的玉米种子中，该农药对分支数量、根毛发生率和根毛长度产生了负面影响。因此，应寻找带有细胞保护剂的新型接种剂配方以及研发兼容性农药，以确保接种促进植物生长细菌所带来的益处。
