Multifunctional microorganisms, showing multiple mechanisms of plant growth promotion, are desirable in the development of microbial formulations. Aspergillus niger is known for its capacity to solubilize mineral phosphates, being considered a promising candidate for the development of inoculants. Furthermore, A. niger can produce phytohormones, which places it as a potential multifunctional plant-growth promoter. To test this potential, we evaluated if A. niger can promote the growth of coffee (Coffea arabica L.) seedlings in a substrate with no P limitation. The seedlings inoculated with a granular formulation of A. niger presented significant increments in height (5.6%), stem diameter (6.1%), number of leaves (8.5%), and root dry mass (13%) and volume (15%) after 30 weeks. These findings show that A. niger can promote the growth of coffee seedlings in a substrate with no P limitation, providing evidence that A. niger has additional plant growth-promotion traits.

在微生物制剂的开发中需要显示出多种植物生长促进机制的多功能微生物。黑曲霉以其溶解无机磷酸盐的能力而闻名，被认为是孕育剂开发的有前途的候选者。此外，黑曲霉可以产生植物激素，这使其成为潜在的多功能植物生长促进剂。为了测试这种潜力，我们评估了黑曲霉是否可以在无磷限制的底物中促进咖啡（阿拉伯咖啡）幼苗的生长。接种了黑曲霉颗粒制剂的幼苗在30周后，它们的身高（5.6％），茎直径（6.1％），叶数（8.5％）和根部干重（13％）和体积（15％）显着增加。这些发现表明，黑曲霉可以在不受磷限制的底物中促进咖啡幼苗的生长，提供了黑曲霉具有其他植物生长促进性状的证据。