由于缺水,重金属(HM)的污染是农业农业社区的主要环境问题,这迫使巴基斯坦的农民将废水用于灌溉目的。城市周围种植的蔬菜用采矿附近地区的生活和工业废水灌溉,油漆,和陶瓷工业用各种HMs污染农作物的可食用部分。镉(Cd)是耕地土壤中的一种剧毒金属,会进入食物链并破坏本地生物群,最终导致植物生长和发育的减少。然而,微生物和生长调节剂的使用增强了植物的生长和发育以及HM固定到细胞壁中并阻碍了它们进入食物链。因此,细菌联盟与外源应用茉莉酸(JA)的综合使用减轻了金属应力的不利影响,最终降低了金属通过土壤进入根部的流动性。因此,本研究是为了检查耐Cd细菌和JA对生长的影响,营养状况,花椰菜中Cd的吸收。我们的结果表明,增加Cd的浓度会对生长产生负面影响,生理,和生化属性,虽然使用细菌联盟(SS7+SS8)与JA(40μmolL-1)显着提高叶绿素含量,茎新鲜和干燥生物量(19.7、12.7和17.3%),根长和根鲜重和干重(28.8,15.2和23.0%),和凝乳的鲜重和干重以及凝乳直径(18.7、12.6和15.1%)。然而,土壤Cd的最大减少,根,凝乳摄取量分别为8%、11%和9.3%,分别,与对照组相比,在综合治疗下。此外,整合细菌联盟和JA可提高超氧化物歧化酶(SOD)(16.79%),过氧化物酶歧化酶(POD)(26.96%),过氧化物酶(POX)(26.13%),过氧化氢酶(CAT)(26.86%)。植物氮,磷,土壤中的钾含量显著增加,根,凝乳高达8%、11%和9.3%,分别。因此,Klebsiella菌株与JA组合是一种潜在的植物稳定剂,它可以减少土壤中Cd对根部的吸收,从而减轻对花椰菜生长和生产力的不利影响。
The pollution of heavy metals (HMs) is a major environmental concern for agricultural farming communities due to water scarcity, which forces farmers to use wastewater for irrigation purposes in Pakistan. Vegetables grown around the cities are irrigated with domestic and industrial wastewater from areas near mining, paint, and ceramic industries that pollute edible parts of crops with various HMs. Cadmium (Cd) is an extremely toxic metal in arable soil that enters the food chain and damages the native biota, ultimately causing a reduction in plant growth and development. However, the use of microbes and growth regulators enhances plant growth and development as well as HM immobilization into the cell wall and hinders their entry into the food chain. Thus, the integrated use of bacterial consortium along with exogenously applied jasmonic acid (JA) mitigates the adverse effect of metal stress, ultimately reducing the metal mobility into roots by soil. Therefore, the current study was conducted to check the impact of Cd-tolerant bacteria and JA on the growth, nutrient status, and uptake of Cd in the cauliflower (Brassica oleracea). Our results demonstrated that increasing concentrations of Cd negatively affect growth, physiological, and biochemical attributes, while the use of a bacterial consortium (SS7 + SS8) with JA (40 μmol L-1) significantly improved chlorophyll contents, stem fresh and dry biomass (19.7, 12.7, and 17.3%), root length and root fresh and dry weights (28.8, 15.2, and 23.0%), and curd fresh and dry weights and curd diameter (18.7, 12.6, and 15.1%). However, the maximum reduction in soil Cd, roots, and curd uptake was observed by 8, 11, and 9.3%, respectively, under integrated treatment as compared to the control. Moreover, integrating bacterial consortium and JA improves superoxide dismutase (SOD) (16.79%), peroxidase dismutase (POD) (26.96%), peroxidase (POX) (26.13%), and catalase (CAT) (26.86%). The plant nitrogen, phosphorus, and potassium contents were significantly increased in soil, roots, and curd up to 8, 11, and 9.3%, respectively. Hence, a consortium of Klebsiella strains in combination with JA is a potential phytostabilizer and it reduces the uptake of Cd from soil to roots to alleviate the adverse impact on cauliflower\'s growth and productivity.