The Influence of Photoperiod on the Regulation of Root and Callus Initiation of Perle Noir (V. vinifera L.): Expression of MADS-Box Gene

Henda Cheikhrouhou^*, Manel Zrida, Bechir Ezzili

Center of Biotechnology Borj Cedria, Hammamlif, Tunisia.

DOI: 10.4236/as.2015.69087                

Abstract

To study the influence of photoperiod on roots differentiation in the Tunisian grapevine (Vitis vinifera L.) cultivar Perle noir, roots and callus initiation were analyzed under three different conditions of day length: long day (LD), short day (SD) and darkness (D). The photoperiod influenced the number of callus and roots per cuttings; it has a significant effect on the roots and callus initiation. Expression profile analysis of six MADS-box genes (VTM8, VSEP2, VAG12, VAG17-1, VAG17-2 and VSOC1.3) during root and callus development is in agreement with the above-mentioned observation. The expression of the MADS-box genes during root and callus development fluctuated in a tissue-dependent manner. These data suggest that all genes are expressed in roots under three photoperiods. Total darkness gives the number of the most important root per cutting compared to the other two conditions. This photoperiodic condition gave the most important expression of the studied genes VAG12, VAG17-2, VAG17-1, VTM8 and VSEP2 transcripts were not found in callus grown in the dark or in LD conditions, respectively. VSOC1.3 transcripts were not found in callus grown in the dark or in SD conditions, respectively. Transcript abundance of VTM8 and VSOC1 was highest in LD.

Keywords

Grapevine, Root, Photoperiod, MADS-Box Genes, Callus, Vitis vinifera L.

Conflicts of Interest

The authors declare no conflicts of interest.

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