Abstract
Embryogenesis and plant regeneration of Texas and international rice, Oryza saliva (L.), varieties (both indica and japonica types) were induced in culture on a regime consisting of the use of ABA or BAP in the subculture medium and small (10 mg) callus pieces on the regeneration medium. Ten 10 mg callus pieces on regeneration medium resulted in a 2- to 10-fold increase in plant regeneration over single 100 mg pieces. Plant regeneration of Texas rice cultivars (Lemont, Rico I, Rexmont and Skybonnet) and Taipei 309 was enhanced by the use of ABA in the subculture medium with a 2-fold and a 3- to 10-fold increase in plant regeneration with 2.6 mgL−1 and 26 mgL−1 ABA in the subculture media, respectively. Regeneration of plants from callus of IR36 and IR64 was not enhanced by ABA but by the use of BAP and Trp in the subculture medium or by 2,4-D alone. The subculture medium containing BAP and Trp produced a 5-fold increase in plant regeneration rate from IR64 callus and was equal to subculture medium containing only 2,4-D for IR36 callus. Both Lemont and IR36 were previously reported to be difficult to regenerate or non-regenerative, however, the use of ABA or BAP in the subculture medium, small callus pieces and visual selection of embryogenic callus allowed the regeneration of up to 20 and 22 plants from 100 mg of Lemont and IR36 callus, respectively.
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Abbreviations
- ABA:
-
abscisic acid
- BAP:
-
benzylaminopurine
- MS:
-
Murashige and Skoog
- NAA:
-
napthaleneacetic acid
- Trp:
-
tryptophan
- 2,4-D:
-
2,4-dichlorophenoxyacetic acid
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Communicated by I. K. Vasil
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Peterson, G., Smith, R. Effect of abscisic acid and callus size on regeneration of american and international rice varieties. Plant Cell Reports 10, 35–38 (1991). https://doi.org/10.1007/BF00233029
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DOI: https://doi.org/10.1007/BF00233029