Low level of SO 2 enhanced chromatid aberrations in tradescantia pollen tubes and seasonal variation of the aberration rates
Mutation Research/Environmental Mutagenesis and Related Subjects, ISSN: 0165-1161, Vol: 21, Issue: 2, Page: 93-100
1973
- 32Citations
- 1Captures
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Article Description
Pollen tube cultures of Tradescantia paludosa Anders. Sax clone-3 were grown on microslides coated with lactose agar medium (0.02% colchicine). They were incubated in an air-tight moist chamber for 18 h to obtain the metaphase chromosomes of the pollen tube generative nuclei. SO 2 treatments were applied at the beginning of the germination stage, 7–10 min after sowing the pollen. A total of about 0.075 ppm of SO 2 was used for the entire incubation period. SO 2 gas was either generated by the reaction between K 2 S 2 O 5 and HCl inside the chamber or obtained from diluting the gas from commercial SO 2 gas (Matheson Gas Products) of known concentration through a gas dilution system. Full-grown cultures fixed in Gate's fluid and stained in Feulgen were made into permanent slides for aberration-rate determination. Year-round study of SO 2 effect on chromosomes was made possible by using a GRO-LUX lamp (Sylvania) illuminated incubator, in winter, to promote mitotic activity of pollen culture. In these studies, SO 2 enhanced chromatid aberration rates (average 46 breaks/100 cells) in the cultures grown from field or hot-house plants during 3 consecutive summers (1970–1972). There was a gradual decrease in the fall and a gradual increase in spring in both background and enhanced aberration rates. When summer pollen cultures from GRO-LUX lamp pre-conditioned (7–20 days) plants were treated with SO 2 in the same chamber with those grown from summer hot-house plants, high rate (42 breaks/100 cells) of aberration was observed only in cultures from summer hot-house plants.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0165116173900046; http://dx.doi.org/10.1016/0165-1161(73)90004-6; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0010386213&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/0165116173900046; https://api.elsevier.com/content/article/PII:0165116173900046?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:0165116173900046?httpAccept=text/plain; http://dx.doi.org/10.1016/0165-1161%2873%2990004-6; https://dx.doi.org/10.1016/0165-1161%2873%2990004-6
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