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ABSTRACT
To evaluate the impact of F in soil on seed germination, growth performance and biochemical parameters of Chinese cabbage (Brassica campestris L.) and oilseed rape (Brassica napus L.), a pot experiment was conducted by amending soil with 0, 200, 400, 600, 800 and 1000 mg F kg−1 spiked soil. During aging of exogenous F in soil, an increase in the soil pH and concentrations of all F fractions was noted at elevated F concentrations. Fluorine in the soil was mainly found in the residual fraction (88% and 86%). The results of pot experiment revealed that the percentages of seed germination rate, chlorophylls concentration, and the dry biomass of Chinese cabbage and oilseed rape decreased by 31, 23, 16%, and 24, 38, 31%, respectively, as compared with their respective controls. The free proline concentration increased by 40% for Chinese cabbage and by 151% for oilseed rape. It was observed that F mainly accumulated in the roots of both plants, and the bioaccumulation factor and translocation factor remained <1. This study showed more remarkable effects of F on oilseed rape than those on Chinese cabbage.
Acknowledgements
This study was financially supported by the Chengdu Science and Technology Project [2018-YF05-00760-SN]; the Fundamental Research Funds for the Central Universities [2019FZJD007]; and the Strategic Cooperation Project between Sichuan University and Yibin Municipal Government [2019CDYB-19].
Disclosure of potential conflicts of interest
No potential conflict of interest was reported by the author(s).