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Expression of miR159 Is Altered in Tomato Plants Undergoing Drought Stress

1
Department of Genetics, University of Valencia, Burjassot, 46100 Valencia, Spain
2
Plant Physiology Area, Biochemistry and Biotechnology Group, Department CAMN, University Jaume I, 12071 Castellón, Spain
*
Author to whom correspondence should be addressed.
Plants 2019, 8(7), 201; https://doi.org/10.3390/plants8070201
Received: 27 May 2019 / Revised: 26 June 2019 / Accepted: 27 June 2019 / Published: 2 July 2019
(This article belongs to the Special Issue The Role of MicroRNAs in Plants)
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Abstract

In a scenario of global climate change, water scarcity is a major threat for agriculture, severely limiting crop yields. Therefore, alternatives are urgently needed for improving plant adaptation to drought stress. Among them, gene expression reprogramming by microRNAs (miRNAs) might offer a biotechnologically sound strategy. Drought-responsive miRNAs have been reported in many plant species, and some of them are known to participate in complex regulatory networks via their regulation of transcription factors involved in water stress signaling. We explored the role of miR159 in the response of Solanum lycopersicum Mill. plants to drought stress by analyzing the expression of sly-miR159 and its target SlMYB transcription factor genes in tomato plants of cv. Ailsa Craig grown in deprived water conditions or in response to mechanical damage caused by the Colorado potato beetle, a devastating insect pest of Solanaceae plants. Results showed that sly-miR159 regulatory function in the tomato plants response to distinct stresses might be mediated by differential stress-specific MYB transcription factor targeting. sly-miR159 targeting of SlMYB33 transcription factor transcript correlated with accumulation of the osmoprotective compounds proline and putrescine, which promote drought tolerance. This highlights the potential role of sly-miR159 in tomato plants’ adaptation to water deficit conditions. View Full-Text
Keywords: Solanum lycopersicum; drought; Colorado potato beetle; miR159; MYB transcription factors; P5CS; proline; putrescine Solanum lycopersicum; drought; Colorado potato beetle; miR159; MYB transcription factors; P5CS; proline; putrescine
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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López-Galiano, M.J.; García-Robles, I.; González-Hernández, A.I.; Camañes, G.; Vicedo, B.; Real, M.D.; Rausell, C. Expression of miR159 Is Altered in Tomato Plants Undergoing Drought Stress. Plants 2019, 8, 201.

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