Abstract
Plant regeneration has been achieved from long-term cell suspension cultures established from leaf derived callus of tepary bean (Phaseolus acutifolius). The proportion of densely cytoplasmic cells in suspension culture increased when cultured in the L-6 medium with 54 μM NAA and 2 μM KN. Filtration of the cells at each of five consecutive subcultures resulted in the isolation of a plant regenerating cell line (TB 686), which is being maintained in L-6 medium with 4.5 μM 2,4-D and 2.3 μM zeatin. Differentiated green cell aggregates were obtained when cells from maintenance medium were transferred to the same medium with 10 μM BA. Embryo-like structures developed from these aggregates on L-6 medium with 2.3 μM zeatin, 0.69 μM GA3 and 1.5 μM NAA. Plantlets regenerated from these structures when they were cultured on L-6 medium with 7.0 μM NAA and 1.0 μM KN. Plant regeneration from the cell line remained relatively constant for 270 days. Regenerated plants were grown to maturity in the greenhouse.
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Abbreviations
- BA:
-
Benzyladenine
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
- GA3 :
-
Gibberellic acid
- IPA:
-
Isopentenyladenine
- KN:
-
Kinetin
- NAA:
-
Naphthaleneacetic acid
- AA:
-
Amino acid medium (Toriyama and Hinita, 1985)
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Communicated by G. C. Phillips
The research was sponsored by United States Agency for International Development, Washington D.C., Cooperative Agreement DAN-4137-A-00-4053-00
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Kumar, A.S., Gamborg, O.L. & Nabors, M.W. Regeneration from long-term cell suspension cultures of tepary bean (Phaseolus acutifolius). Plant Cell Reports 7, 322–325 (1988). https://doi.org/10.1007/BF00269928
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DOI: https://doi.org/10.1007/BF00269928