Intraplant nuclear DNA content variation in diploid nuclei of maize (Zea mays L.)

D. P. Biradar, A. Lane Rayburn

Research output: Contribution to journalArticlepeer-review


Diploid nuclei from stem, mesocotyl, nodal root and root tip tissue of two maize hybrids were examined with respect to their DNA content. The nuclei were isolated and stained with DAPI and passed through a flow cytometer-cell sorter. The titration curve for each tissue was determined. Significant variation was observed among nuclei of different tissue types. Stem and root tips had the highest diploid nuclear DNA amounts while 2-week-old mesocotyl had the lowest diploid nuclear DNA amount. These results provide evidence that during plant development and differentiation, the amount of DNA within a diploid nucleus changes through loss of specific DNA sequences. This study also demonstrates the sensitivity of flow cytometry in detecting small intraplant variation in nuclear DNA.

Original languageEnglish (US)
Pages (from-to)1039-1044
Number of pages6
JournalJournal of experimental botany
Issue number6
StatePublished - Jun 1993


  • DNA content
  • Flow cytometry
  • Fluorochrome DAPI
  • Plant development
  • Tissue differentiation

ASJC Scopus subject areas

  • Physiology
  • Plant Science


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