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Influences by position of node and existence of leaf on microtuberization in node culture of potato

감자절간배양에서 마디위치 및 잎의 부착유무에 따른 소괴경형성의 차이

  • Hwang, Hye-Yeon (Department of Horiculture, Chungnam National University) ;
  • Lee, Young-Bok (Department of Horiculture, Chungnam National University)
  • 황혜연 (충남대학교 농업생명과학대학 원예학과) ;
  • 이영복 (충남대학교 농업생명과학대학 원예학과)
  • Published : 2008.03.31

Abstract

Single-node stem pieces ca. 1 cm in length containing a axillary bud were obtained from in vitro plants of potato (Solanum tuberosum L.). The influences by a position of the node and the existence of a leaf at the node were observed in the single-node culture on the 8% sucrose MS medium. The effect of CCC was also investigated for the microtuberization. The apical part node was excellent in the tuberization not to mention shoot length, fresh weight, diameter, the number of node on the in vitro culture of a single-node than the lower part. The differences in the diameter of a tuber formed in the part of the axillary bud on all treatments including the cultivation of the apical part node were not recognized. However, the fresh weight of the tuber showed high value in the tuber formed at the axillary bud of shoot apex part. At 20 days after cultivation, tuberization was promoted in the new stolen that developed from the bud of node with a leaf under SD condition of 8 hours at $20^{\circ}C$. The tuberization from axillary bud of the single-node without leaf was inhibited at high temperature of $28^{\circ}C$ regardless of daylength. Whereas, tuberization at $20^{\circ}C$ and $28^{\circ}C$ was similar without the difference under SD condition but the tuber formation ratio were low. CCC 500 mg/L promoted tuberization and the effect was also showed even under LD condition at $28^{\circ}C$. The inhibiton of tuberization under LD and high temperature condition could be solved by treatment with CCC.

Keywords

References

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