Muhammad Saleem Arif1, Tahira Yasmeen1, Zohaib Abbas1, Shafaqat Ali1,2, Muhammad Rizwan1, Nada H Aljarba3, Saad Alkahtani4, Mohamed M Abdel-Daim4,5. 1. Department of Environmental Science and Engineering, Government College University Faisalabad, Faisalabad, Pakistan. 2. Department of Biological Sciences and Technology, China Medical University, Taichung, Taiwan. 3. Department of Biology, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia. 4. Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia. 5. Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt.
Abstract
Improving growth and productivity of plants that are vulnerable to environmental stresses, such as heavy metals, is of significant importance for meeting global food and energy demands. Because heavy metal toxicity not only causes impaired plant growth, it has also posed many concerns related to human well-being, so mitigation of heavy metal pollution is a necessary priority for a cleaner environment and healthier world. Hydrogen sulfide (H2S), a gaseous signaling molecule, is involved in metal-related oxidative stress mitigation and increased stress tolerance in plants. It performs multifunctional roles in plant growth regulation while reducing the adverse effects of abiotic stress. Most effective function of H2S in plants is to eliminate metal-related oxidative toxicity by regulating several key physiobiochemical processes. Soil pollution by heavy metals presents significant environmental challenge due to the absence of vegetation cover and the resulting depletion of key soil functions. However, the use of stress alleviators, such as H2S, along with suitable crop plants, has considerable potential for an effective management of these contaminated soils. Overall, the present review examines the imperative role of exogenous application of different H2S donors in reducing HMs toxicity, by promoting plant growth, stabilizing their physiobiochemical processes, and upregulating antioxidative metabolic activities. In addition, crosstalk of different growth regulators with endogenous H2S and their contribution to the mitigation of metal phytotoxicity have also been explored.
Improving growth and productivity of plants that are vulnerapan class="Chemical">ble to environmentn>an class="Chemical">al stresses, such as heavy metals, is of significant importance for meeting global food and energy demands. Because heavy metaltoxicity not only causes impaired plant growth, it has also posed many concerns related to human well-being, so mitigation of heavy metal pollution is a necessary priority for a cleaner environment and healthier world. Hydrogen sulfide (H2S), a gaseous signaling molecule, is involved in metal-related oxidative stress mitigation and increased stress tolerance in plants. It performs multifunctional roles in plant growth regulation while reducing the adverse effects of abiotic stress. Most effective function of H2S in plants is to eliminate metal-related oxidative toxicityby regulating several key physiobiochemical processes. Soil pollution by heavy metals presents significant environmental challenge due to the absence of vegetation cover and the resulting depletion of key soil functions. However, the use of stressalleviators, such as H2S, along with suitable crop plants, has considerable potential for an effective management of these contaminated soils. Overall, the present review examines the imperative role of exogenous application of different H2S donors in reducing HMs toxicity, by promoting plant growth, stabilizing their physiobiochemical processes, and upregulating antioxidative metabolic activities. In addition, crosstalk of different growth regulators with endogenous H2S and their contribution to the mitigation of metal phytotoxicity have also been explored.
Authors: Saud Alamri; Hayssam M Ali; M Iqbal R Khan; Vijay Pratap Singh; Manzer H Siddiqui Journal: Plant Physiol Biochem Date: 2020-07-20 Impact factor: 4.270