Wang Hua, Wang Shengtao, He Xiaolin, Xie Minghui, Cai Miaozhen, Zhu Yaxin, Du Shaoting
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.
College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China.
Food Chem X. 2023 Jul 18;19:100795. doi: 10.1016/j.fochx.2023.100795. eCollection 2023 Oct 30.
Soil heavy metal contamination and its enrichment in the edible parts of crops have gained global concern. In this study, a compound bacterial agent possessing the ability to produce the plant hormone, abscisic acid (ABA), was applied to contaminated farmland in Hunan province. Its application reduced the concentration of Cd in radish, cabbage, mustard, and lettuce by 15-144%. Accordingly, the Cd contents in these vegetables were found to be below the maximum limits set by GB 2762-2017. Meanwhile, bacteria agents also led to a significant increase in crops yield by 45-82%. Furthermore, the nutritional indices, including soluble sugar and soluble protein increased by 18-66%, as well as the antioxidant indices, including total phenolic, ascorbate content, and DPPH capacity, enhanced by 12-76%, 10-49% and 50-140%, respectively. In conclusion, the use of ABA-producing bacteria is anticipated to be a novel approach for the safe use of soil with moderate and low pollution.
土壤重金属污染及其在作物可食用部分的富集已引起全球关注。在本研究中，将一种具有产生植物激素脱落酸（ABA）能力的复合细菌制剂施用于湖南省的污染农田。其施用使萝卜、白菜、芥菜和生菜中的镉浓度降低了15%至144%。相应地，发现这些蔬菜中的镉含量低于GB 2762-2017规定的最大限量。同时，细菌制剂还使作物产量显著提高了45%至82%。此外，包括可溶性糖和可溶性蛋白在内的营养指标分别提高了18%至66%，包括总酚、抗坏血酸含量和DPPH清除能力在内的抗氧化指标分别提高了12%至76%、10%至49%和50%至140%。总之，使用产ABA细菌有望成为一种安全利用中度和低度污染土壤的新方法。
