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Figure 7 | Chemical and Biological Technologies in Agriculture

Figure 7

From: Physiological responses to humic substances as plant growth promoter

Figure 7

Plant growth-promoting bacteria (PGPB) colonization by most probable number method of fresh root tissues of maize seedlings. After 7 days of inoculation with a suspension of 109 cell · mL−1 of Herbaspirillum seropedicae and in the presence of 20 mg C L−1 of different humic acids (HA): HAv, vermicompost; HAfc, from filter cake a residue of sugarcane factory; HAi, inceptisol; HAo, oxisol; and HAu, ultisol.

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