Peculiar Evolutionary History of miR390-Guided TAS3-Like Genes in Land PlantsReportar como inadecuado




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The Scientific World JournalVolume 2013 2013, Article ID 924153, 14 pages

Research Article

Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia

Main Botanic Garden Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276, Russia

Received 6 July 2013; Accepted 27 August 2013

Academic Editors: B. D. Gregory and S. Mlotshwa

Copyright © 2013 Maria S. Krasnikova 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

PCR-based approach was used as a phylogenetic profiling tool to probe genomic DNA samples from representatives of evolutionary distant moss taxa, namely, classes Bryopsida, Tetraphidopsida, Polytrichopsida, Andreaeopsida, and Sphagnopsida. We found relatives of all Physcomitrella patens miR390 and TAS3-like loci in these plant taxa excluding Sphagnopsida. Importantly, cloning and sequencing of Marchantia polymorpha genomic DNA showed miR390 and TAS3-like sequences which were also found among genomic reads of M. polymorpha at NCBI database. Our data suggest that the ancient plant miR390-dependent TAS molecular machinery firstly evolved to target AP2-like mRNAs in Marchantiophyta and only then both ARF- and AP2-specific mRNAs in mosses. The presented analysis shows that moss TAS3 families may undergone losses of tasiAP2 sites during evolution toward ferns and seed plants. These data confirm that miR390-guided genes coding for ARF- and AP2-specific ta-siRNAs have been gradually changed during land plant evolution.





Autor: Maria S. Krasnikova, Denis V. Goryunov, Alexey V. Troitsky, Andrey G. Solovyev, Lydmila V. Ozerova, and Sergey Y. Morozov

Fuente: https://www.hindawi.com/



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