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Publication
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| Research Title |
Effects of melatonin on growth, some physiological characteristics and antioxidant enzyme activities in rice seedling under drought stress |
| Date of Distribution |
29 November 2018 |
| Conference |
| Title of the Conference |
International Conference on Life Science and Biological Engineering |
| Organiser |
Higher Education Forum |
| Conference Place |
Osaka International Convention Center |
| Province/State |
Osaka |
| Conference Date |
27 November 2018 |
| To |
29 November 2018 |
| Proceeding Paper |
| Volume |
- |
| Issue |
- |
| Page |
89 |
| Editors/edition/publisher |
Higher Education Forum |
| Abstract |
In Thailand, rice (Oryza sativa L.) is one of the most important crops. It is a widely cultivated staple food that is exported worldwide (Siriphollakul et al., 2017). However, the cultivation usually exposed to drought stress which is the factor limiting plant growth. Many recent studies found that plant growth regulators are extensively used to regulate plant growth and to enhance plant drought stress tolerance. Melatonin is a biological hormone involved in many important physiological processes in plants including the regulation of plant growth and development. Furthermore, melatonin acts not only as a signaling molecule for enhancing the resistance of plants to biotic and abiotic stresses, but also as a powerful free-radical scavenger and has a direct antioxidant activity (Arnao and Hernández-Ruiz, 2015). Although effects of melatonin on drought tolerant and the role of melatonin in alleviating drought stress has been widely described for several species, the role of melatonin in rice response to stress is still less well known. Therefore, this research purposes to investigate the effects of melatonin on growth, some physiological characteristics and antioxidant enzyme activities in rice under drought stress. The results showed that after 7 days of drought stress, rice seedling growth including shoot length, root length, fresh weight and dry weight significantly decreased in non-treated plant (0 µM melatonin) compared to the control. The foliar spray with melatonin benefitted to rice seedlings by increasing shoot and root length as well as root fresh weight and root dry weight compared to non-treated plant. However, shoot fresh weight and shoot dry weight were not barely altered from non-treated plant. Relative water content significantly decreased in non-treated plant compared to the control, with reduction by 28%. The application of melatonin showed relative water content of treated plant higher than that of non-treated plant. The drought-stressed plant showed higher chlorophyll content compared to the control plant. The foliar spray with melatonin slightly increased chlorophyll content compared to non-treated plant. Under drought stress, the electrolyte leakage significantly increased in non-treated compared to the control, however, melatonin treatment had a positive effect on electrolyte leakage. Melatonin decreased the electrolyte leakage, that was lower than non-treated plant. Furthermore, malondialdehyde content, an indicator of lipid peroxidation was not altered. In addition, drought stress increased the activities of antioxidant enzymes such as SOD, CAT, APX and POD in rice seedling and the application of exogenous melatonin tended to increase these enzymes activities compared to non-treated plant.
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| Author |
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| Peer Review Status |
มีผู้ประเมินอิสระ |
| Level of Conference |
นานาชาติ |
| Type of Proceeding |
Abstract |
| Type of Presentation |
Oral |
| Part of thesis |
true |
| Presentation awarding |
false |
| Attach file |
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| Citation |
0
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Journal Publication
ไทย