High-frequency callus induction and plant regeneration in Tripsacum dactyloides (L.)

R. V. Sairam, C. Wilber, J. Franklin, B. Smith, J. Bazil, R. Hassel, D. Whaling, K. Frutiger, C. A. Blakey, R. Vierling, S. L. Goldman

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8 Scopus citations


A protocol for high-frequency callus, somatic embryogenesis, and plant regeneration for Tripsacum is described. Plants were regenerated from complete shoot meristems (3-4mm) via organogenesis and embryogenesis. In organogenesis, the shoot meristems were cultured directly on a high cytokinin medium comprising 5-10mgl-1 (22.2-44.4μM) 6-benzyladenine (BA). The number of multiple shoots varied from six to eight from each meristem. The time required for production of plants from organogenesis was rapid (4-6wk). In contrast, callus was induced on an auxin medium and continuously cultured on an auxin medium for production of somatic embryos. Prolific callus with numerous somatic embryos developed within 3-4wk when cultured on an auxin medium containing 5mgl-1 (22.6μM) 2,4-dichlorophenoxyacetic acid (2,4-D). The number of shoots induced varied from two to five per callus. Regardless of the cultivars used, the frequency of callus induction and plant regeneration was between 48% and 94%. The seed germination procedures also were modified and resulted in a maximum of 60-80% seed germination. Finally, the rate of T-DNA transfer to complete shoot meristems of Tripsacum was high on the auxin medium and was independent of whether super-virulent strains of Agrobacterium were used or not.

Original languageEnglish (US)
Pages (from-to)435-440
Number of pages6
JournalIn Vitro Cellular and Developmental Biology - Plant
Issue number5
StatePublished - Sep 2002

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Plant Science


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