College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
Ecotoxicol Environ Saf. 2019 Aug 15;177:100-107. doi: 10.1016/j.ecoenv.2019.04.010. Epub 2019 Apr 9.
Contamination of vegetable plants with cadmium (Cd) has become a serious issue in recent years. In the present study, pakchoi (Brassica chinensis L.) grown in Cd-contaminated soil inoculated with abscisic acid (ABA)-generating bacteria, Azospirillum brasilense and Bacillus subtilis, showed 28%-281% and 26%-255% greater biomass, and 40%-79% and 43%-77% lower Cd concentrations, respectively, than those of the control plants. These treatments also alleviated the Cd-induced photosynthesis inhibition and oxidative damage (indicated by malondialdehyde [MDA], HO, and O). Furthermore, the application of bacteria also remarkably improved the levels of antioxidant-related compounds (total phenolics, total flavonoids, ascorbate, and 2,2-diphenyl-1-picrylhydrazyl [DPPH] activity) and nutritional quality (soluble sugar and soluble protein) in the Cd-supplied plants. Based on these results, we conclude that the application of ABA-generating bacteria might be an alternative strategy for improving the biomass production and quality of vegetable plants grown in Cd-contaminated soil.
近年来，蔬菜作物受到镉（Cd）污染的问题日益严重。本研究表明，在受镉污染的土壤中种植的小白菜（ Brassica chinensis L.），接种能产生脱落酸（ABA）的细菌（ Azospirillum brasilense 和 Bacillus subtilis ）后，生物量分别比对照增加了 28%-281%和 26%-255%，镉浓度分别降低了 40%-79%和 43%-77%。这些处理还缓解了镉诱导的光合作用抑制和氧化损伤（用丙二醛[MDA]、羟基自由基（HO）和超氧阴离子（O ）表示）。此外，细菌的应用还显著提高了供镉植物中抗氧化相关化合物（总酚、总黄酮、抗坏血酸和 2,2-二苯基-1-苦基肼[DPPH]活性）和营养品质（可溶性糖和可溶性蛋白）的水平。基于这些结果，我们得出结论，应用能产生 ABA 的细菌可能是提高在镉污染土壤中生长的蔬菜作物生物量和品质的一种替代策略。
