Abstract
Anthers from a doubled-haploid line of spring wheat (Triticum aestivum L.) cv. Pavon 76 were plated in liquid P-4 medium supplemented with 2,4-dichlorophenoxyacetic acid (2,4-D) at four concentrations (0.5, 1.0, 2.0, 4.0 mg/l) for 5, 10, 15, and 25 days before being transferred to another medium with the same or reduced 2,4-D concentrations for the remainder of the induction phase for a total of 45 days. Incubation with 0.5 mg/l 2,4-D for 45 days produced lower callus yield and plant regeneration, indicative of insufficient auxin for callus induction. Callus yield and regeneration frequencies were higher with 1.0 mg/l 2,4-D. With 2.0 or 4.0 mg/l 2,4-D, an induction period of 10 or 15 days was sufficient for initiation of callus development. The extended presence of 2–4 mg/l 2,4-D in the medium beyond the initiation phase was detrimental to plant regeneration. Thus optimal callus induction and plant regeneration could be obtained through manipulating the 2,4-D concentration and the duration of its presence in the induction medium.
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Received: 1 December 1997 / Revision received: 15 February 1999 / Accepted: 26 February 1999
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Zheng, M., Konzak, C. Effect of 2,4-dichlorophenoxyacetic acid on callus induction and plant regeneration in anther culture of wheat (Triticum aestivum L.). Plant Cell Reports 19, 69–73 (1999). https://doi.org/10.1007/s002990050712
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DOI: https://doi.org/10.1007/s002990050712