ABSTRACT
Tobacco exhibited a relatively strong environmental adaptability, and it is appealing to explore its vanadium stress-responsive characteristic. An indoor pot experiment with tobacco cultivated in soil with respectively 0 (control), 75, 150, 300, 600, and 900 mg kg−1 of exogenous pentavalent vanadium V(V) and in vanadium-rich soil from a mining area with 385.6 mg kg−1 of vanadium (marked as M0) was conducted. Results showed that tobacco growth was significantly (p< 0.05) inhibited at all treatments versus control. The seedlings could not survive at 900 mg kg−1 vanadium treatment. Vanadium was mainly concentrated in the root. Tobacco showed a relatively high vanadium bioconcentration capability (0.19 − 0.74) and a low translocation capability (0.02 − 0.03) in soil with exogenous vanadium addition treatments. Contrarily, at the control and M0 treatment, tobacco exhibited a low vanadium bioconcentration capability (0.06 − 0.08) and a relatively high translocation capability (0.06 − 0.09). For M0 treatment, the high percentage of vanadium in the residual fraction was also conducive to tobacco establishment in vanadium-loaded surroundings. Overall, tobacco showed the potential to colonize vanadium-rich soil. In soils after growing tobacco, Proteobacteria was the most abundant microbial community of the rhizospheric soil, followed by Actinobacteria.
Disclosure statement
No potential conflict of interest was reported by the author(s).