Abstract
Leaf discs from vegetative Streptocarpus nobilis plants were cultured in vitro in media with cytokinin (BAP or K at 0.35 mg.1−1) and auxin (IAA, NAA or 2,4-D at 0.1 mg.1−1). Under short days (8-h photoperiod) in medium with IAA and BAP, floral buds developed in 100% of the cultures; under long days (16-h photoperiod) only shoots were formed. In medium with IAA and K, flowering was reduced. Flowers rarely formed in medium containing NAA and K, but roots developed profusely. NAA + BAP promoted leafy shoots which rarely flowered later. The effect of 2,4-D was to inhibit flowering completely and to induce callusing and formation of teratomous structures.
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Abbreviations
- BAP:
-
6-benzylaminopuri ne
- K:
-
kinetin
- IAA:
-
indoleacetic acid
- NAA:
-
naphthaleneacetic acid
- 2,4-D:
-
2,4-dichlo rophenoxyacetic acid
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Communicated by I. K. Vasil
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Handro, W. Effects of some growth regulators on in vitro flowering of Streptocarpus nobilis . Plant Cell Reports 2, 133–136 (1983). https://doi.org/10.1007/BF00269337
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DOI: https://doi.org/10.1007/BF00269337