Exogenous Melatonin Improves Tolerance to Water Deficit by Promoting Cuticle Formation in Tomato Plants

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Fei DingShuoxin Zhang

Abstract

The plant cuticle, composed of cutin and waxes, is a hydrophobic layer coating the aerial organs of terrestrial plants and playing a critical role in limiting water loss. While melatonin has been recently demonstrated to be involved in responses to drought stress in plants, its relationship with cuticle formation is not known. In the present work, we report the effects of melatonin on the formation of cuticle in tomato leaves subjected to water deficit. Preliminary analysis by light microscope showed that tomato leaves pretreated with exogenous melatonin might have thicker cutin than tomato leaves without melatonin pretreatment under water deficit condition. Chemical characterization showed that exogenous application of melatonin increased the level of cuticular waxes in tomato leaves under water deficit. Consistent with the change in cuticular waxes was the increased abundance of wax-associated gene transcripts. Further, assessment of water loss and chlorophyll leaching in tomato leaves revealed the association of cuticle deposition with reduced leaf permeability, which is important in restricting water loss in water deficit-stressed tomato plants. These results suggest a role for melatonin in regulating leaf cuticle formation...Continue Reading

References

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Citations

Apr 20, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Dan-Dan LiuDa-Ke Zhao
May 8, 2020·Plant Signaling & Behavior·Ramakrishna Akula, Soumya Mukherjee
Nov 8, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Fei DingShuoxin Zhang
Sep 5, 2020·Antioxidants·Mohamed Moustafa-FaragShaoying Ai
Feb 6, 2020·International Journal of Molecular Sciences·Hui XiaDong Liang
Aug 8, 2020·International Journal of Molecular Sciences·Rong ZhouCarl-Otto Ottosen
Jul 28, 2019·The Plant Journal : for Cell and Molecular Biology·Cheng LiJinhong Chen
Dec 12, 2020·Physiologia Plantarum·Rahul Kumar TiwariGaurav Zinta

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Methods Mentioned

BETA
environmental stresses
transmission electron microscopy
PCR

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