Abstract:
The paper presents the variability of the DNA and RNA content of a
mature leaf belonging to the Tămâioasă românească grapevine cultivar. The
analyse has been effectuated in four phenological phases: unbudding,
flowering, ripening, full maturation of grapes. On constate that at unbudding,
the nucleic acids content is maximum, because in this phases, the proteinic
synthesis are very intense for cell organits biogenesis. În other phases, the
content in DNA and RNA diminish very much. Therefore, the content of DNA
and RNA is maximum at unbudding and minimum at full maturation of
grapes. The content of DNA in vegetal cell is relative constant, between
certain limits, while the content of RNA is enough variable. During the
vegetation period, DNA content in the mature leaf of Tămâioasă românească
grapevine variety is much higher compared to RNA content. The variability
of DNA content is more restricted compared to the one of RNA content.
RNA/DNA ratio from mature leaf of Tămâioasă românească grapevine
variety is maximum at the phenological phase of full maturation of grapes
and minimum at the phenological phases of flowering. The estimate of
proportion between of contents in RNA and DNA in mature leaves at
Tămâioasă românească grapevine variety permit certain observations regard
at the complexity of the genotype analised
