Abstract
The influence of growth regulators on <i>in vitro</i> bulblet formation from <i>ex vitro</i> roots was studied in asiatic and oriental hybrids of <i>Lilium</i> The root segments (3–4 mm) isolated from the middle zone of 2–3 cm <i>ex vitro</i> root were cultured on Murashige and Skoog (MS) medium containing 1 or 1.5 mg/dm<sup>3</sup> naphthalene acetic acid (NAA) and/or benzyladenine (BA). Bulblets were not produced in the presence of NAA and BA alone. A significant increase in the per cent explants producing bulblets was observed with 1.5 mg/dm<sup>3</sup> NAA and 1 mg/dm<sup>3</sup> BA. Maximum number of bulblets and average fresh weight per bulblet was observed with 2 mg/dm<sup>3</sup> NAA and 1.5 mg/dm<sup>3</sup> BA after 90 days of culture. No differences were found among cultivars in bulblet regeneration of explant or bulblet number although more weighty bulblets occurred in cv. Apeldoorn. About 82% bulblet survival was recorded in coco peat after 30 days of transfer to pots.
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