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If urgent and adequate measures are not taken for these species, a danger for
its existence will emerge. As alternative for use we offer to cultivate
Rheum
palmatum var. tanguticum
Maxim, which shows a good adaptation in Bulgarian
conditions, and has a high content of anthracene derivatives (more than 4,5%)
( Е в с т а т и е в а , 1987; П р о т и ч , Е в с т а т и е в а , 1989; E v s t
a t i e v a, 1999 ).
SPECIES UNDER RESTRICTED REGIME OF USE
The increasing interest in medicinal plants concern traditionally used herbs,
such as
Valeriana officinalis
L.,
Menyanthes trifoliata
L.,
Adonis vernalis
L.,
Inula helenium
L.,
Rubia tinctorum L., Althaea officinalis
L.
Atropa belladonna
L. bringing up the important issue o f the protection and reasonable utilization.
Now, their natural resources are restricted.
VALERIANA OFFICINALIS L.
The study on the distribution of the species within the 60 populations in
the country, indicated the great forms variety, which is geographically
differentiated, as well as ecologically, cytologically and phytochemically, into
two subspecies and four cytotypes:
V. officinalis
ssp.
collina
(Wallr.) Numan
(
V.collina
Wa l l r . ) , cytotype
collina (2n =
28) and cytotype
illirica
(2
n
= 14)
and V,
officinalis ssp. officinalis (V.nitida
Kreyer s.str.j, cytotype
nitida
(2n=28)
and cytotype
officinalis
(У.
officinalis
L.s.str.)(2n = 14) (E v s t a t i e v a, 1996;
E v s t a t i e v a, et al. 1992). The best form of distribution with higher content
of biologically active substances has been selected from
V. officinalis
ssp.
officinalis
cytotype
nitida.
It is cultivated as an important cultivar in our
country.
*
MENYANTHES TRIFOLIATA
L,,
ADONIS VERNALIS L„ INULA HELENIUM
L.,
ALTHAEA OFFICINALIS L., ATROPA BELLADONNA
L.
Plant breeding of these species resulted in improving the varieties, adapted
to cultivation in the country. Technologies for cultivation of valuable plants,
using the bioagricultural methods have been developed ( Е в с т а т и е - в а ,
К у н ч е в, 2001; Е в с т а т и е в а , 1999; П р о т и ч , Е в с т а т и е -
в а, 1994)
In vitro
propagation for the cultivation of the best forms of
Atropa belladonna,
with a high percentage of biologically active substances, has been used for
producing of standardized drug (D i m i t г о v a et al., 1996).
CONCLUSION
The results of the investigation of 14 endangered medicinal plants, confirmed
the limited distribution of their genetic resources. More of them are with
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