Abstract
Calluses were induced from immature embryos of an indica type rice and finely dispersed cell suspension cultures were initiated from the callus using modified AA medium (S1 medium). The suspension cultures were maintained alternatively (1–2 passages in each medium) in S1 medium and S2 medium, the latter containing KNO3, NH4NO3, proline and glutamine as nitrogen source. Protoplasts of high quality were isolated form suspension cells cultured in S2 medium supplemented with ABA. Embedding the protoplasts in agarose blocks containing NH4NO3-free modified KM8P(PM1) medium and immersing the blocks in NH4NO3-containing modified KM8P(PM3) medium were most effective for obtaining protoplast division and callus formation. The protoplast-derived calluses were precultured in potato extract-aand/or ABA-containing N6(D1, D2 or D3) media and many embryo-like structures were formed. These structures developed into plantlets after being transferred to N6 differentiation (D4) medium. The regenerated plantlets grew into mature plants and beard seeds normally.
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Abbreviations
- AA medium:
-
amino acids based medium
- ABA:
-
abscisic acid
- BA:
-
benzyladenine
- 2,4-D :
-
2,4-dichlorophenoxyacetic acid
- DF:
-
division frequency
- IAA:
-
indoleacetic acid
- KIN:
-
kinetin
- NAA:
-
naphthaleneacetic acid
- PE:
-
planting efficiency
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Yin, Y., Li, S., Chen, Y. et al. Fertile plants regenerated from suspension culture-derived protoplasts of an indica type rice (Oryza sativa L.). Plant Cell Tiss Organ Cult 32, 61–68 (1993). https://doi.org/10.1007/BF00040117
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DOI: https://doi.org/10.1007/BF00040117