Plant Systematics and Evolution

, Volume 126, Issue 3, pp 323–330 | Cite as

Mitotic cycle time and DNA content in annual and perennialMicroseridinae (Compositae, Cichoriaceae)

  • H. James Price
  • Konrad Bachmann


Within eight annual and perennialMicroseridinae species studied, the duration of the mitotic cycle is positively correlated with the nuclear DNA content, cycle time (hrs) = 7.3 + 0.32 × pg DNA/nucleus. Within the generaAgoseris andMicroseris, the annuals have lower DNA contents and more rapid mitotic cycle times than do the perennials. This relationship is predicted by the nucleotypic theory ofBennett. Annual species ofPyrrhopappus have relatively high DNA contents and a proportionately longer mitotic cycle time, but contrary to that expected by the nucleotypic theory as originally proposed have the fastest growth rate and shortest generation time observed in theMicroseridinae. This rapid developmental rate is discussed, nucleotypically, however, by analyzing relationships between DNA content, mitotic cycle time, and cell size.

Key words

Compositae Cichoriaceae Microseridinae DNA content mitotic cycle time annuals perennials developmental rates nucleotype 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bennett, M. D., 1972: Nuclear DNA content and minimum generation time in herbaceous plants. Proc. R. Soc. Lond.B 181, 109–135.PubMedGoogle Scholar
  2. Conger, A. D., andFairchild, M., 1953: A quick-freeze method for making smear slides permanent. Stain Technol.28, 281–283.PubMedGoogle Scholar
  3. Edwards, G. A., andEndrizzi, J. E., 1975: Cell size, nuclear size and DNA content relationships inGossypium. Can. J. Genet. Cytol.17, 181–186.Google Scholar
  4. Evans, G. M., Rees, H., Snell, C. L., andSun, S., 1972: The relationship between nuclear DNA amount and the duration of the mitotic cycle. In:Darlington, C. D., andLewis, K. R. (Eds.): Chromosomes Today,3, 24–31. New York: Hafner.Google Scholar
  5. Nagl, W., 1974: Mitotic cycle time in perennial and annual plants with various amounts of DNA and heterochromatin. Developmental Biology39, 342–346.PubMedGoogle Scholar
  6. —, andEhrendorfer, F., 1974: DNA content, heterochromatin, mitotic index, and growth in perennial and annualAnthemideae (Asteraceae). Plant Syst. Evol.123, 35–54.Google Scholar
  7. Northington, D. K., 1974: Systematic studies of the genusPyrrhopappus (Compositae, Cichorieae). Museum Special Publication6, 1–38. Lubbock: Texas Tech Press.Google Scholar
  8. Price, H. J., 1976: Evolution of DNA content in higher plants. Bot. Rev.42, 27–52.Google Scholar
  9. —, andBachmann, K., 1975: DNA content and evolution in the Microseridinae. Amer. J. Bot.62, 262–267.Google Scholar
  10. —, andNauman, A. F., 1973: Correlations between nuclear volume, cell volume and DNA content in meristematic cells of herbaceous angiosperms. Experientia29, 1028–1029.Google Scholar
  11. Schmid, W., 1965: Autoradiography of human chromosomes. InYunis, J. J. (Ed.): Human Chromosome Methodology, 102–109. London-New York: Academic Press.Google Scholar
  12. Siegel, S., 1956: Nonparametric Statistics. 184–193. New York: McGraw-Hill.Google Scholar
  13. Stebbins, G. L., 1953: A new classification of the tribeCichorieae, familyCompositae. Madrono12, 65–81.Google Scholar
  14. Van't Hof, J., 1965: Relationships between mitotic cycle duration, S period duration and the average rate of DNA synthesis in the root meristem cells of several plants. Exp. Cell Res.39, 48–58.PubMedGoogle Scholar
  15. —, andSparrow, A. H., 1963: A relationship between DNA content, nuclear volume, and minimum mitotic cycle time. Proc. Natl. Acad. Sci. U.S.A.49, 897–902.PubMedGoogle Scholar
  16. Wimber, D. E., 1960: Duration of the nuclear cycle inTradescantia paludosa root tips as measured with3H-thymidine. Amer. J. Bot.47, 828–834.Google Scholar

Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • H. James Price
    • 1
  • Konrad Bachmann
    • 2
  1. 1.Genetics Section, Department of Plant SciencesTexas A & M UniversityCollege StationUSA
  2. 2.Fakultät für BiologieUniversität HeidelbergHeidelberg 1Federal Republic of Germany

Personalised recommendations