Influence of Light Intensity and Date of Explantation on Growth of Geranium Callus1
1978; American Society for Horticultural Science; Volume: 13; Issue: 2 Linguagem: Inglês
10.21273/hortsci.13.2.153
ISSN2327-9834
Autores Tópico(s)Flowering Plant Growth and Cultivation
ResumoAbstract Explants from haploid, diploid, and tetraploid geraniums ( Pelargonium ⨯ hortorum Bailey) were grown under 1, 5, and 10 klx of continuous cool white fluorescent lamps. Maximum callus production, measured by fresh weight increase occurred at 5 klx for ‘Kleine Liebling (haploid) and at 1 klx for ‘Sprinter’ (diploid) and ‘Sincerity’ (tetraploid). All cultivars grew poorly at 10 klx. Increase in fresh weight of ‘Sprinter’ tissue was 3 times greater than that of ‘Kleine Liebling’ and ‘Sincereity’ at 1 klx and 2 times greater at 5 klx. Differences among light treatments and among cultivars were more apparent with explants taken in winter versus explants taken in the summer.
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