Alam Pravej, Kaur Kohli Sukhmeen, Al Balawi Thamer, Altalayan Fahad H, Alam Prawez, Ashraf Muhammad, Bhardwaj Renu, Ahmad Parvaiz
Department of Biology, College of Science and Humanities, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia.
Plant Stress Physiology Lab, Department of Botanical and Environment Sciences, Guru Nanak Dev University, Amritsar 43005, India.
Plants (Basel). 2020 Nov 4;9(11):1487. doi: 10.3390/plants9111487.
Cadmium (Cd) metal toxicity is a crucial ecological matter that requires immediate efforts to mitigate it. plants were exposed to Cd (0 and 200 µM as CdSO) and foliar application of 24-Epibrassinolide (EBR) (0, 10 and 10 M). The toxic effect of Cd was evident in terms of declined growth and biomass yield, lowered levels of pigment content and chlorophyll fluorescence, and reduction in gas exchange attributes. The levels of proline and glycinebetaine increased in response to Cd treatment. There was an imperative rise in the contents of HO and malondialdehyde as well as electrolyte leakage in the Cd-stressed plants. With the application of EBR, there was a significant replenishment in growth attributes and photosynthetic efficacy. The contents of ROS (reactive oxygen species) and malondialdehyde as well as electrolyte leakage were reduced by the hormone supplementation. Enhancement in the contents of glutathione and ascorbic acid, and the activities of enzymes of the antioxidative defense system and glyoxalase system was recorded in response to Cd as well as hormone treatment. The in situ levels of Cd in roots and shoot were augmented in response to Cd treatment, but were found to be lowered by the EBR application.
镉（Cd）金属毒性是一个关键的生态问题，需要立即采取措施加以缓解。将植物暴露于Cd（以CdSO形式存在，浓度为0和200 µM），并叶面喷施24-表油菜素内酯（EBR）（浓度为0、10和10 M）。Cd的毒性作用在生长和生物量产量下降、色素含量和叶绿素荧光水平降低以及气体交换特性降低方面表现明显。脯氨酸和甘氨酸甜菜碱的水平因Cd处理而增加。在Cd胁迫的植物中，过氧化氢（HO）和丙二醛的含量以及电解质渗漏显著增加。施用EBR后，生长特性和光合效率有显著恢复。激素补充降低了活性氧（ROS）和丙二醛的含量以及电解质渗漏。在Cd处理以及激素处理后，谷胱甘肽和抗坏血酸的含量增加，抗氧化防御系统和乙二醛酶系统的酶活性增强。根和地上部的Cd原位水平因Cd处理而增加，但施用EBR后发现其降低。
