Figure 4. Regeneration on petiole segments of Pelargonium x domesticum cv. Madame Layal cultivated in vitro dependent on the concentration of 2,4-dichlorophenoxyacetic acid (2,4-D) and 6-benzylaminopurine (BAP) after primary culture. ■ no response, □ only callus formation, x embryos, ∆ shoot formation.


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