Jia Jibao, Dai Huiping, Wei Shuhe, Xue Jianming, Skuza Lidia, Sun Quan, Li Rong
Agriculture College, Ningxia University, Yinchuan, 750021, China.
College of Biological Science & Engineering, Shaanxi University of Technology, Hanzhong, 723001, China.
Plant Physiol Biochem. 2023 Mar;196:661-667. doi: 10.1016/j.plaphy.2023.02.019. Epub 2023 Feb 12.
Antibiotics are a kind of emerging contaminant in soil. Tetracycline (TC) and oxytetracycline (OTC) in soil are often detected, even with very high concentration in the soils of facility agriculture due to their good effect, low price and large usage. Copper (Cu) is common heavy metal pollutant in soil. The toxicity roles of TC, OTC and/or Cu in soil on a commonly consumed vegetable Capsicum annuum L. and its Cu accumulation were not clear till now. The results of pot experiment showed that the TC or OTC added in soil alone didn't produce poison effects for C. annuum after 6 weeks and 12 weeks growth reflected by some physiological index like SOD, CAT and APX activities changes, while the biomass changes affirmed them either. Cu contaminated soil significantly inhibited the growth of C. annuum. Furthermore, combined pollution of Cu with TC or OTC was with more serious suppression of C. annuum growth. The suppression role of OTC was heavier than TC in Cu and TC or OTC contaminated soil. Such phenomenon was relevant with the role of TC or OTC increased Cu concentration in C. annuum. The improvement role of TC or OTC on Cu accumulation in C. annuum caused by the increased extractable Cu concentration in soil. The study demonstrated that TC or OTC added in soil alone was without any toxicity to C. annuum. But they may aggravate the hurt of C. annuum caused by Cu through increased its accumulation from soil. Thus, such combine pollution should be avoided in safe agricultural product.
抗生素是土壤中一种新兴的污染物。土壤中的四环素（TC）和土霉素（OTC）经常被检测到，由于其效果良好、价格低廉且用量大，设施农业土壤中的含量甚至很高。铜（Cu）是土壤中常见的重金属污染物。到目前为止，土壤中TC、OTC和/或Cu对常见食用蔬菜辣椒及其铜积累的毒性作用尚不清楚。盆栽试验结果表明，单独添加到土壤中的TC或OTC在生长6周和12周后，通过超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）活性变化等一些生理指标反映，对辣椒没有产生毒害作用，生物量变化也证实了这一点。铜污染土壤显著抑制了辣椒的生长。此外，铜与TC或OTC的复合污染对辣椒生长的抑制作用更严重。在铜与TC或OTC污染的土壤中，OTC的抑制作用比TC更重。这种现象与TC或OTC增加辣椒中铜浓度的作用有关。TC或OTC对土壤中可提取铜浓度增加导致的辣椒中铜积累有改善作用。研究表明，单独添加到土壤中的TC或OTC对辣椒没有任何毒性。但它们可能通过增加辣椒从土壤中的积累而加重铜对辣椒的伤害。因此，在安全农产品生产中应避免这种复合污染。
