Anacardium othonianum Rizzini, a cashew tree native to the Brazilian Cerrado, is economically important due to its applications in the food, chemical and pharmaceutical industries. However, A. othonianum yields a crop with low productivity due to a number of factors, such as nutritionally poor soils, drought and losses due to pests and diseases. Brazil is one of the nine largest cashew nut producers worldwide, and sustainable technologies are needed to increase the productivity of this crop. In this context, the use of endophytic microorganisms could promote plant growth and provide protection against phytopathogens. In this study, the isolation of the root endophytic community of A. othonianum led to the characterization of 22 distinct bacterial strains with multifunctional traits for plant growth promotion. The results of in vitro assays to assess auxin synthesis, phosphate solubilization, phosphatase and siderophore production and biocontrol against Fusarium oxysporum led to the selection of Acinetobacter lwoffii Bac109 and Pantoea agglomerans Bac131 as the most promising strains. The reinoculation of the Bac109 and Bac131 strains onto A. othonianum seeds showed that the treatment containing a mixture of these strains was the most effective in promoting increases in the biometric parameters of early plant growth. Thus, this study highlights the biotechnological potential of a consortium of A. lwoffii Bac109 and P. agglomerans Bac131 for future applications in sustainable cashew cultivation.

Anacardium othonianum Rizzini是巴西Cerrado的一种腰果树，由于其在食品，化学和制药行业中的应用而具有重要的经济意义。但是，由于多种因素，如营养不良的土壤，干旱和病虫害造成的损失，A。othonianum产量低。巴西是全球九大腰果生产国之一，需要可持续技术来提高该作物的生产力。在这种情况下，使用内生微生物可以促进植物生长并提供针对植物病原体的保护。在这项研究中，隔离的A. othonianum根内生群落导致表征22种具有多功能性状的独特细菌菌株以促进植物生长。评估生长素合成，磷酸盐增溶，磷酸酶和铁载体生产以及针对尖孢镰刀菌的生物防治的体外分析结果导致选择了不动杆菌不育芽孢杆菌Bac109和聚结泛菌Bac131作为最有希望的菌株。将Bac109和Bac131菌株重新接种到A. othonianum种子上表明，包含这些菌株混合物的处理最有效地促进了植物早期生长的生物特征参数的增加。因此，这项研究强调了一个财团的生物技术潜力。A. lwoffii Bac109和P. agloglomerans Bac131，用于未来腰果栽培中的未来应用。