Plant regeneration from sugarbeet (Beta vulgaris L.) hypocotyls cultured in vitro and flow cytometric nuclear DNA analysis of regenerants

• Published in: Plant cell reports 1992-07, Vol.11 (7), p.329-333
• Main Authors: JACQ, B, TETU, T, SANGWAN, R. S, DE LAAT, A, SANGWAN-NORREEL, B. S
• Format: Article
• Language: English
• Subjects: Biological and medical sciences; Biotechnology; Eukaryotic cell cultures; Fundamental and applied biological sciences. Psychology; In vitro propagation: entire plant regeneration from tissues and cell cultures; Methods. Procedures. Technologies; Plant cells and fungal cells
• ISSN: 0721-7714; 1432-203X
• DOI: 10.1007/BF00233359

A simple and reproducible protocol for regeneration of sugarbeet plants from hypocotyl expiants derived from 21 day-old-seedlings has been developed. Expiants were cultured on MS medium containing 0.3 mg/l N6-Benzylaminopurine, 0.1 mg/l Naphthalene Acetic Acid, 50 mg/l adenine and 0.5% (w/v) fructose, 0.5% (w/v) sucrose and 0.5% (w/v) glucose to induce the formation of organogenic calli (2.3% to 46.5% organogenic efficiency, depending on populations). Shoot formation was induced in callus cultures of more than 1600 genotypes. Physiological age affected culture response and different genotypes had different temperature optima for organogenesis. Following transfer of regenerated plants to the greenhouse, DNA determinations were made to study the stability of ploidy. Differences in ploidy were observed in plants derived from both shortterm and long-term callus cultures; diploid true-to-type regenerants were 96% and 83%, respectively, from shortterm and long-term callus cultures.