期刊
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-PLANT
卷 45, 期 2, 页码 122-128出版社
SPRINGER
DOI: 10.1007/s11627-008-9186-2
关键词
Organogenesis; Vaccinium angustifolium; Cytokinins; In vitro culture; Ex vitro rooting
An efficient system to regenerate shoots on excised leaves of greenhouse-grown wild lowbush blueberry (Vaccinium angustifolium Ait.) was developed in vitro. The effect of thidiazuron (TDZ) on adventitious bud and shoot formation from apical, medial, and basal segments of the leaves was tested. Leaf cultures produced multiple buds and shoots with or without an intermediary callus phase on 2.3-4.5 mu M TDZ within 6 wk of culture initiation. The greatest shoot regeneration came from young expanding basal leaf segments positioned with the adaxial side touching the culture medium and maintained for 2 wk in darkness. Callus development and shoot regeneration depended not only on the polarity of the explants but also on the genotype of the clone that supplied the explant material. TDZ-initiated cultures were transferred to medium containing 2.3-4.6 mu M zeatin and produced usable shoots after one additional subculture. Elongated shoots were dipped in 39.4 mM indole-3-butyric acid powder and planted on a peat:perlite soilless medium at a ratio of 3:2 (v/v), which yielded an 80-90% rooting efficiency. The plantlets were acclimatized and eventually established in the greenhouse with 75-85% survival.
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