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. 2020 Apr 3;11:443. doi: 10.3389/fmicb.2020.00443

FIGURE 2.

FIGURE 2

Qualitative estimation of plant growth-promoting properties of BHU-AV3 isolate. (A) Siderophore assay – yellow zone indicates positive result; (B) IAA production assay – development of pink color indicates positive result; (C) Pi solubilization test – development of red to yellow color indicates positive result.