Abstract:
In the paper are presented
data regarding the number of somatic
chromosome determine at three species of
plants with ornamental value from
spontaneous flora of Romania (Allium
ursinum L., Centaurea phrygia L., Dianthus
armeria L.) and cultivated in the
experimental field to evaluate the adapt
capacity, aiming to use them in crops. For
chromosome study was used a root tip
meristem obtained from plantlets aged 3-7
days. Chromosome was stained by Feulghen
method, and the samples were examined at
optic microscope Motic, relevant images
being assumed by a video camera and
processed with its soft. The obtained results
were compared with the ones already
existed in the literature, at populations from
other ecologic and geographic areas. So at
Allium ursinum, from Dobrovăţ forest (Iaşi
area) all the analysed individuals had a
chromosome number 2n=2x=14, specie
being characterized by a great karyological
stability. Studies made on Centaurea
phrygia, from Neamţ area, show the
presence of tetraploid individuals, with
4n=44 chromosomes. The specie is known
as a diploid one, with chromosome number
2n =2x=22, but many authors confirm the
existence of diploid and tetraploid
populations, separated by geography and
ecology. Population of Dianthus armeria,
identified in Ia i area (Bîrnova forest), is a
mixt population with x=15, formed by
tetraploid individuals 4n=60, but in which
could be found also a minor diploid
cytotype with chromosome number 2n=30.
