Melatonin promotes water‐stress tolerance, lateral root formation, and seed germination in cucumber (Cucumis sativus L.)
Top Cited Papers
- 31 May 2012
- journal article
- Published by Wiley in Journal of Pineal Research
- Vol. 54 (1), 15-23
- https://doi.org/10.1111/j.1600-079x.2012.01015.x
Abstract
A comprehensive investigation was carried out to determine the changes that occurred in water‐stressed cucumber (Cucumis sativus L.) in response to melatonin treatment. We examined the potential roles of melatonin during seed germination and root generation and measured its effect on reactive oxygen species (ROS) levels, antioxidant enzyme activities, and photosynthesis. Melatonin alleviated polyethylene glycol induced inhibition of seed germination, with 100 μm melatonin‐treated seeds showing the greatest germination rate. Melatonin stimulated root generation and vitality and increased the root:shoot ratio; therefore, melatonin may have an effect on strengthening cucumber roots. Melatonin treatment significantly reduced chlorophyll degradation. Seedlings treated with 100 μm melatonin clearly showed a higher photosynthetic rate, thus reversing the effect of water stress. Furthermore, the ultrastructure of chloroplasts in water‐stressed cucumber leaves was maintained after melatonin treatment. The antioxidant levels and activities of the ROS scavenging enzymes, i.e., superoxide dismutase, peroxidase, and catalase, were also increased by melatonin. These results suggest that the adverse effects of water stress can be minimized by the application of melatonin.Keywords
This publication has 60 references indexed in Scilit:
- New paradigms in chronic intestinal inflammation and colon cancer: role of melatoninJournal of Pineal Research, 2011
- Sirtuins, melatonin and circadian rhythms: building a bridge between aging and cancerJournal of Pineal Research, 2009
- Chemical stress by different agents affects the melatonin content of barley rootsJournal of Pineal Research, 2009
- Melatonin promotes adventitious‐ and lateral root regeneration in etiolated hypocotyls of Lupinus albus L.Journal of Pineal Research, 2006
- High levels of melatonin in the seeds of edible plants: Possible function in germ tissue protectionLife Sciences, 2000
- Improving the thiobarbituric acid-reactive-substances assay for estimating lipid peroxidation in plant tissues containing anthocyanin and other interfering compoundsPlanta, 1999
- A Novel Melatonin Metabolite, Cyclic 3-Hydroxymelatonin: A Biomarker ofin VivoHydroxyl Radical GenerationBiochemical and Biophysical Research Communications, 1998
- Photoprotection and Other Responses of Plants to High Light StressAnnual Review of Plant Physiology and Plant Molecular Biology, 1992
- Pineal hormone melatonin oscillates also in the dinoflagellateGonyaulax polyedraThe Science of Nature, 1991
- A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye bindingAnalytical Biochemistry, 1976