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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (903) Last page : (909)
Article doi: http://dx.doi.org/10.18782/2320-7051.5933

Cadmium Induced Stress Mitigation in Tomato by Exogenous Melatonin

M. Umapathi1*, M. K. Kalarani2, M. Udhaya Bharathi1 and P. Kalaiselvi3
1*Department of Crop Physiology, Tamil Nadu Agricultural University, Coimbatore, India
2Tapioca and Castor Research Station, Yethapur, Tamil Nadu Agricultural University, India
3Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, India
*Corresponding Author E-mail: umapathi182@gmail.com
Received: 25.10.2017  |  Revised: 29.11.2017   |  Accepted: 6.12.2017  


Melatonin is a ubiquitous signal molecule, playing crucial roles in plant growth and stress tolerance. Its beneficial effects include better water conservation in leaves, more chlorophyll contents, enhanced endogenous melatonin, synthesis of phytochelatins (PCs), over production of antioxidants, greater photosynthetic performance under stress conditions. In the present study, melatonin application significantly increases cadmium tolerance in tomato plants. This study was undertaken with PKM 1 variety of tomato was selected to evaluate the melatonin function under cadmium stress. Pre-treatment with melatonin significantly induced endogenous melatonin content in plant but foliar spray 25 ppm of melatonin had more marked effect on endogenous melatonin biosynthesis and also it reduces cadmium accumulation in the economical part of the plant through its phytochelating process.

Key words: Melatonin, Cadmium, Phytochelatins, Stress, Antioxidants

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Umapathi, M., Kalarani, M.K., Bharathi, M.U. and Kalaiselvi, P., Cadmium Induced Stress Mitigation in Tomato by Exogenous Melatonin, Int. J. Pure App. Biosci.6(1): 903-909 (2018). doi: http://dx.doi.org/10.18782/2320-7051.5933