Evaluation of the effects of humic acids on maize root architecture by label-free proteomics analysis.

Humic substances have been widely used as plant growth promoters to improve the yield of agricultural crops. However, the mechanisms underlying this effect remain unclear. Root soluble protein profiles in plants 11 days after planting and cultivated with and without humic acids (HA, 50 mg CL), were analyzed using the label-free quantitative proteomic approach.