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Plant regeneration from stem and petiole protoplasts of sweet potato (Ipomoea batatas) and its wild relative, I. lacunosa

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Abstract

A protoplast-to-plant regeneration system has been established for sweet potato (Ipomoea batatas (L.) Lam.) and its wild relative, I. lacunosa L. Viable protoplasts, isolated from preplasmolyzed stems and petioles of in vitro-grown plants, were cultured on liquid MS (Murashige & Skoog 1962) medium that supported cell division and colony formation. Embryogenic calli of sweet potato were induced on agar-solidified MS medium supplemented with 3% (w/v) sucrose, 50 mg l-1 casamino acids, 0.2–0.5 mg l-1 2,4-d, 1.0 mg l-1 kinetin and 1.0 mg l-1 ABA. On average, 3 plants were regenerated from a single sweet potato callus subcultured on semi-solid MS medium containing 3% (w/v) sucrose, 800 mg l-1 glutamine, 2.0 mg l-1 BA or 1.0 mg l-1 kinetin and 1.0 mg l-1 GA3. Embryogenic calli of I. lacunosa L. were initiated on semi-solid MS medium containing 0.2–0.5 mg l-1 IAA and 1.0–2.0 mg l-1 BA. An average of 5 plants was regenerated from a single sweet potato callus subcultured on semi-solid MS medium containing 0.5 or 1.0 mg l-1 GA3.

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Abbreviations

ABA:

abscisic acid

BA:

benzyladenine

2,4-d :

2,4-dichlorophenoxyacetic acid

GA3 :

gibberellic acid

IAA:

indole acetic acid

MES:

2-(N-morpholino)-ethane sulfonic acid

NAA:

α-naphthaleneacetic acid

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Belarmino, M.M., Abe, T. & Sasahara, T. Plant regeneration from stem and petiole protoplasts of sweet potato (Ipomoea batatas) and its wild relative, I. lacunosa . Plant Cell Tiss Organ Cult 37, 145–150 (1994). https://doi.org/10.1007/BF00043608

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