POTENTIAL ROLE OF MELATONIN IN ALLEVIATING HEAVY METALS PHYTOTOXICITY IN PLANTS

Author:

Ali Muhammad,Muhammad Ameen ,Malik Muhammad Waqas,Tamimi Solaima Akhter,Mustafa Kashif,Nazir Muhammad Irfan,Irfan Muhammad,Ahmad Salman,Ayub Muhammad Ashar,Muhammad Nadeem

Abstract

Heavy metal contamination is a major environmental concern because of their potential to severely damage plant growth and yield. Plants are unable to complete their morpho-physiological growth when subjected to heavy metal stress because heavy metals are toxic and can accumulate in plant tissues, disrupting normal physiological processes. Melatonin, a hormone produced by plants has been shown to play an important role in protecting plants against heavy metal toxicity by mitigating the damage caused by oxidative stress and improving antioxidative defense mechanism. This review provides an overview of the existing literature on the potential use of melatonin in plant sciences with the purpose of determining its effectiveness in alleviating heavy metal toxicity in plants. The increase in antioxidative enzymes superoxide dismutase and catalase and the levels of reactive oxygen species (ROS) and malondialdehyde are lowered after exogenous melatonin treatment indicating that heavy metal-induced oxidative stress in plants can be mitigated. Under heavy metal stress, melatonin provision increases plant growth and yield in a several ways, including by enhancing photosynthetic activity, nitrogen absorption, and root characteristics. It is concluded in this review that research on melatonin in plant sciences is providing a new avenue for reducing plant heavy metal stress. Melatonin mediated heavy metal resistance can have a great potential in mitigating the adverse effects of transgenic metals which open new avenues of research in plant stress physiology

Publisher

Pakistan Journal of Biotechnology - PJBT

Subject

Applied Microbiology and Biotechnology,Biotechnology

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