Kanitzia 18. - NYME Természettudományi Kar - Nyugat ...

posals, the population-stands from the Transylvanian Basin (Romania) belong to the K.
ceratoides (L.) Gueldenst., and they probably had been in a kind of historical and biogeographical
relationships with the other disjunct population-stands of the species distributed
in Europe (E. Russia, C. Ukraine, Makedonia, Spain) or North Africa (Marocco, Algeria)
(Ball 1996, Jalas & Souminen 1980, Dominguez et al. 2001), and mostly with the populations
in Lower Austria (Goggendorf, Oberschoderlee (Janchen 1956, Adler et al. 1994) and
in the Transdanubian Hungary (Nagyhörcsök-puszta) described by Schilberszky (1891),
which already disappeared [Farkas (ed.) 1999, Király (ed.) 2009]. For the Transylvanian
Basin (Romania) the species was discovered by Soó (1945) near Vultureni/Borsaújfalu
(Someş Tableland/ Szamosháti-dombság), followed later by other three recorded localities
from the area of the Transylvanian Lowland in the last decade: Groapa Rădăii (Laposdülő)
(Bădărău et al. 2002), Poiana Frăţii (Bethlentanya) (BĂDĂRĂU et al. ined., KOVÁCS 2009
ined.), Pănet (Mezőpanit) (KOVÁCS 2009 ined.). Our records have been realized during the
field works and investigations on the dry- and semi-dry grasslands, meadow-steppes, xerothermic
plant communities in the Transylvanian Basin (KOVÁCS 2009), when we investigated
the forest-steppe area in the south-eastern part of the Transylvanian Lawland also. It
is curious that on the basis of the Transylvanian forest steppe characteristics the species
appearances/occurences could have predicted for a long time, particular floristic studies,
vegetation surveys and nature protection works for the Transylvanian Lowland (PRODAN
1931, SOÓ 1949, CSŰRÖS et al. 1961, RESMERIŢĂ et al. 1968, NIEDERMAIER 1970, POP I. et
al. 2002, DONIŢA & et al. 2005, SÂRBU et al. 2007) did not indicate any data about the
species presence in this region. Do to the investigation of BĂDĂRĂU et al. (2002) completed
with present contribution, the number of species occurences in the Transylvanian Basin
rises to four localities. The necessity of evaluation of these population-stands constitue a
main task for vegetation ecology and phytocoenology. The present survey contributes new
data to elucidate the ecological characteristics and to establish the coenological relations
of the Krascheninnikovia ceratoides-stands in the Transylvanian Basin.
The wide holartic distribution and the large ecological areas (semi-deserts,
steppes, dry grasslands) of K. ceratoides is in relation with the main biological characteristics
of the plant: that half-shrub growing form, „protective” stellate hairs, short perennial
main axis with the possibility to develep numerous branches, woody anatomy with succesive
cambial activity, tetraploidy (2n=36), outbreeding population structure, and several
other characteristics which contributed to the ancient and present chorological succes, especially
in colonizing altered areas (MORARIU 1952, MOHAJERY & RASTI 1995, BALL 1996,
DOMINGUEZ et al. 2001, HEKLAU & RÖSER 2008).
Matherials and methods
During our field investigation on the distribution and structure of the dry and semidry
grassland vegetation in the Central and Eastern part of the Transylvanian Basin (2009)
we identified two new sites/provenance for the species Krascheninnikovia ceratoides near
the following localities: Pănet (Mezőpanit) in the place named „Dl. Şico” (Sikó-hegy)
Mureş county, and near the Poiana Frăţii (Bethlentanya), Frata in the place named „Onisie”
Cluj county. Consulting the recent Romanian botanical works and monographies (OPREA
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