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- 저자 : Meral Yucel (검색결과 1 건)
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Gulsum Aydin,Huseyin Avni Oktem,Meral Yucel,Ming-Tsair Chan 한국식물생명공학회 2014 Plant biotechnology reports Vol.8 No.3
MYB transcription factors are involved indiverse biochemical and physiological processes, includinghormone signaling, defense, and stress responses. In thepresent study, we developed a transgenic potato (Solanumtuberosum L. cv. Kennebec) expressing the rice Osmyb4gene, which encodes the transcription factor MYB4. Thetransgene was under the control of either the constitutiveCaMV35S promoter or the stress-induced ArabidopsisCOR15a promoter. The potential involvement of MYB4 incertain physiological processes and the abiotic stressresponse in the potato was evaluated. The transgenic plantsdid not exhibit growth retardation, and they showed nosignificant difference (P\0.05) in tuber yield from that ofnon-transgenic wild-type plants. Although the chlorophylla and b as well as the anthocyanin contents of the sixtransgenic lines were similar to those of the wild type, thetransgenic line S2 presented a significantly higher carotenoidcontent. The total sugar contents of the lines S2 andM48 were significantly higher than that of the wild-typeplants. S2 and M48 were significantly more tolerant ofsalinity than the wild type, according to measured growthparameters. Transgenic plants grown under a high concentrationof boric acid (3 mM) exhibited greater survivalrates than non-transgenic control plants. On the other hand,the transgenic plants did not show an improvement infreezing tolerance. Overall, our results indicated thatMYB4 may affect diverse processes such as carotenoidbiosynthesis, sugar metabolism, and salinity tolerance inpotato, and that it may be an upstream regulatory elementof these processes.
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