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  • 1 COMSATS University Islamabad, Pakistan
  • 2 Bahauddin Zakariya University, Pakistan
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Tartary buckwheat, known for its rich source of health beneficial secondary metabolites, is cultivated in many areas of the world. Among different environmental factors, photoperiod strongly influence its growth, flowering time, and ultimately the yield. In this context, epigenetics could contribute significantly in the regulation of plant response against changing environment. Therefore, with the aim to study the involvement of DNA methylation in photoperiod mediated plant response, genome-wide DNA methylation analysis was performed in two accessions (A1 and A2) of Tartary buckwheat using three photoperiodic treatments, i.e., 10-hr light/day (T1), 12-hr light/day (T2), and 14-hr light/day (T3). Flowering time and plant fresh weight data revealed that accessions A1 and A2 prefer T1 and T2 treatments, respectively. Total DNA methylation ratio increased with the increase in photoperiod in accession A1 but decreased under same conditions in accession A2. Full methylation increased significantly while intensive decrease in hemimethylation was noted from T2 to T3 in A1, whereas full methylation strongly increased and hemimethylation strongly decreased from T1 to T2 in A2. Overall, the DNA methylation events appeared more frequently than demethylation events. This study reports for the first time an accession-/genotype specific pattern of shift in the DNA methylation under different photoperiodic treatments that will pave the way toward identification of specific genes involved in the regulation of plant response against photoperiodic stress.

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Maász, Gábor - Hungarian Academy of Sciences, Centre for Ecological Research
Barina, Zoltán - Hungarian Natural History Museum, Department of Botany
Pongrácz, Péter - Eötvös Loránd University, Department of Ethology
Gábriel, Róbert - University of Pécs, Szentágothai Research Centre
Vágvölgyi, Csaba - University of Szeged, Department of Microbiology
Hideg, Éva - University of Pécs, Department of Plant Biology
Solti, Ádám - Eötvös Loránd University, Department of Plan Physiology and Molecular Plant Biology
Erős, Tibor - Hungarian Academy of Sciences, Centre for Ecological Research
Székely, Tamás - University of Bath, University of Debrecen
Dobolyi, Árpád - Eötvös Loránd University, Department of Neurobiology and Physiology
Tamás, Andrea - University of Pécs, Department of Anatomy
Kovács, Tibor - Eötvös Loránd University, Department of Genetics
Serfőző, Zoltán - Hungarian Academy of Sciences, Balaton Limnological Institute
Bede-Fazekas, Ákos - Hungarian Academy of Sciences, Centre for Ecological Research
Bugyi, Beáta - University of Pécs, Department of Biophysics
Fugazza, Claudia - Eötvös Loránd University, Department of Ethology
Chmura, Damjan - University of Bielsko-Biala, Institute of Environmental Protection and Engineering
Neugart, Susanne - Leibniz Institute of Vegetable and Ornamental Crops
Contardo-Jara, Valeska - Technical University of Berlin, Institute of Ecology