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BioMed Research International
Volume 2017 (2017), Article ID 4975146, 6 pages
https://doi.org/10.1155/2017/4975146
Research Article

miR319, miR390, and miR393 Are Involved in Aluminum Response in Flax (Linum usitatissimum L.)

1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
2All-Russian Research Institute for Flax, Torzhok 172002, Russia
3Faculty of Biology, Lomonosov Moscow State University, Moscow 119991, Russia

Correspondence should be addressed to Nataliya V. Melnikova; ur.xednay@4629254-vnm

Received 23 September 2016; Revised 6 January 2017; Accepted 29 January 2017; Published 19 February 2017

Academic Editor: Xiaobai Li

Copyright © 2017 Alexey A. Dmitriev et al. 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.

Abstract

Acid soils limit agricultural production worldwide. Major reason of crop losses in acid soils is the toxicity of aluminum (Al). In the present work, we investigated expression alterations of microRNAs in flax (Linum usitatissimum L.) plants under Al stress. Flax seedlings of resistant (TMP1919 and G1071/4_k) and sensitive (Lira and G1071/4_o) to Al cultivars and lines were exposed to AlCl3 solution for 4 and 24 hours. Twelve small RNA libraries were constructed and sequenced using Illumina platform. In total, 97 microRNAs from 18 conserved families were identified. miR319, miR390, and miR393 revealed expression alterations associated with Al treatment of flax plants. Moreover, for miR390 and miR393, the alterations were distinct in sensitive and resistant to Al genotypes. Expression level changes of miR319 and miR390 were confirmed using qPCR analysis. In flax, potential targets of miR319 are TCPs, miR390–TAS3 and GRF5, and miR393–AFB2-coding transcripts. TCPs, TAS3, GRF5, and AFB2 participate in regulation of plant growth and development. The involvement of miR319, miR390, and miR393 in response to Al stress in flax was shown here for the first time. We speculate that these microRNAs play an important role in Al response via regulation of growth processes in flax plants.