한국자원식물학회지 (Korean Journal of Plant Resources)

  • 제29권6호
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  • Pages.635-641
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  • 2016
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  • 1226-3591(pISSN)
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  • 2287-8203(eISSN)
한국자원식물학회 (The Plant Resources Society of Korea)
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Cryopreservation of in Vitro Grown Shoot Tips of Sweet Potato (Ipomoea batatas L.) by the Encapsulation-Vitrification Method

  • Yi, JungYoon (National Agrobiodiversity Center, NAAS, RDA) ;
  • Lee, GiAn (National Agrobiodiversity Center, NAAS, RDA) ;
  • Lee, YoungYi (National Agrobiodiversity Center, NAAS, RDA) ;
  • Gwag, JaeGyun (National Agrobiodiversity Center, NAAS, RDA) ;
  • Son, EunHo (National Agrobiodiversity Center, NAAS, RDA) ;
  • Park, HongJae (National Agrobiodiversity Center, NAAS, RDA)
  • 투고 : 2016.06.15
  • 심사 : 2016.10.24
  • 발행 : 2016.12.31
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초록

Sweet potato (Ipomoea batatas L.) shoot tips grown in vitro were successfully cryopreserved by encapsulation-vitrification. Encapsulated explants are very easily manipulated, due to the relatively large size of the alginate beads, and a large number of samples can be treated simultaneously. In this study, the effects of sucrose preculture, cryoprotectant preculture, and post-warm recovery media on regrowth, following liquid nitrogen (LN) exposure, were investigated to establish an efficient encapsulation-vitrification protocol for sweet potato. Shoot tips of plants grown in vitro were precultured in 0.3 M sucrose for 2 d before encapsulation. Encapsulated shoot tips were pre-incubated in liquid MS (Murashige and Skoog) medium containing 0.5 M sucrose for 16 h, before preculturing in sucrose-enriched medium (0.7 M sucrose) for 8 h. Shoot tips were osmoprotected with 35% plant vitrification solution 3 (PVS3) for 3 h, before being dehydrated with PVS3 for 2 h at $25^{\circ}C$. The encapsulated and dehydrated shoot tips were transferred to 2 mL cryotubes, suspended in 0.5 mL PVS3, and plunged directly into liquid N. High levels of shoot formation were obtained for the cv. Yeulmi (65.7%) and Yeonwhangmi (80.3%). The regrowth rates of cryopreserved samples in Yeulmi (78.9%) and Yeonwhangmi (91.3%), following culture on ammonium-free MS medium for 5 d, were much higher than those cultured on standard MS medium (65.7% and 80.3%, respectively). This encapsulation-vitrification is a promising method for the long-term preservation of sweet potato.

키워드

참고문헌

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피인용 문헌

  1. Biobanking of vegetable genetic resources by in vitro conservation and cryopreservation vol.29, pp.13, 2016, https://doi.org/10.1007/s10531-020-02051-0