Figure 1

Lantana camara endophytes were auxin producing and phosphate solubilizing. (A) The endophytes were grown in Luria- tryptophan broth in the presence of 0 and 1000 ppm As. Auxin production was quantified in culture supernatants at A₅₄₀ against a standard curve of IAA; n = 18 (Df for As:1, for endophytes:6, for interaction:6, error:238). (B) & (C) The endophytes were grown in Pikovskaya media in the presence of 0 and 1000 ppm As and phosphate solubilization potential was measured both quantitatively at A₈₈₀ against a standard curve of K₂HPO₄; n = 12 (Df for As:2, for endophytes:6, for interaction:12, error:105), (B) and qualitatively by halo formation around the spotted cells (C). LC1.:Enterobacter sp. LC1, LC2.:Kocuria sp. LC2, LC3.:Kocuria sp. LC3, LC4.:Enterobacter sp. LC4, LC5.:Kocuria sp. LC5, LC6.:Enterobacter sp. LC6, LC7.:Kosakonia sp. LC7, U = Uninoculated control. Data are represented as mean ± SEM. Bars with different letters indicate significant differences amongst different endophytic isolates at a particular As-level (bold italics for +As) obtained from two-way ANOVA with Tukey’s post-hoc test. Significant differences for an individual isolate between −As and +As treatments have been marked by ***(P < 0.001); ns = no significance.