Summary
Results on efficient induction of micronuclei by Cremart in suspension cells and protoplasts of potato are reported. Cremart is a highly effective phosphoric amide herbicide, which acts on the mitotic spindle, and induces micronuclei through modification of mitosis. After treatment with Cremart, metaphase chromosomes changed directly into micronuclei without centromere division and chromatid separation. When suspension cells were treated with Cremart (3.7–15.0 μM) for 48h, and subsequently incubated in a mixture of cell wall-digesting enzymes in the presence of cytochalasin-B and Cremart for 18h, the frequency of micronucleation in the cell/protoplast mixture increased significantly, as compared to that obtained after treatment of suspension cells with Cremart (3.7–15.0 μM) for 48 h. Sieving after enzyme incubation resulted in the recovery of protoplasts, showing mass induction of micronuclei. Also synchronized suspension cells of Nicotiana plumbaginifolia responded with high frequency of micronucleation after Cremart (3.7 μM) treatment. The application of this procedure for partial genome transfer is discussed.
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Abbreviations
- APM:
-
Amiprophos-methyl
- BAP:
-
6-Benzyl aminopurine
- CB:
-
Cytochalasin-B
- MI:
-
Mitotic index
- MN:
-
Micronuclei
- MS:
-
Murashige and Skoog
- NAA:
-
1-Naphthalene acetic acid
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Ramulu, K.S., Dijkhuis, P., Famelaer, I. et al. Cremart: A new chemical for efficient induction of micronuclei in cells and protoplasts for partial genome transfer. Plant Cell Reports 13, 687–691 (1994). https://doi.org/10.1007/BF00231625
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DOI: https://doi.org/10.1007/BF00231625