* Department of Ecology, Botany and Silviculture, Algaeology Laboratory, State University of Moldova

Abstract: In this work was to establish the taxonomic and ecologic structure of algocenoses from different agricultural cultures and the conservation „in situ” through the separation in pure cultures of trunks of nitrogen fixation algae that can be used in the process of soil fertility increase, as a source of nitrogen. It is worth studying the ecologic structure of algae communities, reflected by vital forms.

Key words: edaphic algae, agrophytocenoses, ecobiomorphs

* Department of Ecology, Botany and Silviculture, Algaeology Laboratory, State University of Moldova

Abstract: During 2004-2005 there were performed studies regarding the taxonomic structure of the algaeflora in river Cogâlnic in order to point out the role of the algae during the process of water quality improvement and the role of the indicator of the most representative species. River Cogâlnic, or Cunduc, starts from nearby village Iurceni, district Nisporeni and flows into lake Sasac, and runs for a distance of 243 km. Decrease of the analyzed water quality from the river is caused by the sewerage waters from different sectors from town Hinceshti and Cimishlia that are directed into the river without any depuration. We've studied about 118 samples in which we've discovered about 382 species and intraspecific taxonomic units of algae of the following types: Cyanophyta-73, Euglenophyta-75, Chlorophyta-111, Xantophyta-3, Bacillariophyta-118 and Chrysophyta-2. Mass development of the euglena within Colgalnic river, among which are the following types of species Euglena-26, Trachelomonas-14 and Phacus-13, demonstrate a high level of trophicity in water. Among the chloride algae predominate the following species Scenedesmus-21, and from cyanophyta species predominates Oscillatoria-23. The high taxonomic level of the bacillariophyta algae is determined by species as Navicula-27, Nitzschia-24 and Surirella-16. Most of species refer to categories ß and ß-a , demonstrating a high level of water pollution. This fact speaks about the high concentration of nitrogen and phosphor compounds in water. It was demonstrated that as far as we go from the places were the sewerage waters flow into the river, the excessive quantities of biological elements decrease clearly. Also, go down the quantity of bicarbonates and oxidizers. Numeric growth of the algae is nothing else but a positive role for water depuration.

Key words: algaeflora, phytoplankton, taxonomy, depuration, pollution.

* Department of Ecology, Botany and Silviculture, Algaeology Laboratory, State University of Moldova

Abstract: Rapid increase of the population on the globe scale imposes maximum exploration of the natural resources and first of all of the aquatic resources. As a result are obtained an enormous quantity of residual waters which pollute the waters from rivers, lakes, freatic and underground waters. Elaboration of the depuration methods for residual waters the quantity of which grows continuously, is one of the most up to dated issue of the world. The physical-chemical depuration methods of the residual waters are very expensive and lack the efficiency we would like to have. The most efficient method proved to be the biological method using some species of algae and superior aquatic plants. In our experiences we have involved filamentous green algae Chaetomorpha gracilis and Ch. aerea for depuration of the sewerage water from town Cimishlia. The concentration of the mineral nitrogen compounds in the residual water is around 92,5 mg/l, and of the phosphates 10,1 mg/l. There were used the following concentration of the sewerage water: 10%, 25% and 50%. The most intense development of algae Chaetomorpha aerea was observed in the variant with 10% of residual water, in which the total concentration of the nitrogen was 10,24 mg/l, and of the phosphates 1,05 mg/l. For this variant the depuration water level was about 56,9%. For the case with Chaetomorpha gracilis, the depuration level for the same concentration of the residual water constituted 55,9 %. Increase of the concentration of the polluted water inhibits development of the algae reducing to the minimum their capacity to assimilate the nitrogen and the phosphor. In the solutions with 50 % of residual waters, the algae didn't die, but at the same time they didn't develop. From this results that both algae may be used in the phytoamelioration of the residual waters being diluted at 10% with purified water.

Key words: nitrogen, phosphor, residual water, depuration, inoculate, green filamentous algae

* Alexandru Ioan Cuza University, Biology Department, Vegetal Biology Laboratory, Iasi, Romania

Abstract: The study of saxicolous lichens communities from Bistrita Mountains had as result the identification of two lichens associations: Parmelietum conspersae Felfödy 1941 and Umbilicarietum cylindricae Frey 1933, instaled on siliceous rocks, in 3 locations: Pietrosul Bistritei, Zugreni and Cheile Barnarului. These two lichens communities presented in this paper are mentioned for the first time from Bistrita Mountains territory and described by phytosociological tables and analyzed from the bioforms, floristic elements and ecological indices perspectives.

Key words: saxicolous lichens, associations, Bistrita Mountains

* University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania

Abstract: On confirme présence en Roumanie pour Lathyrus linifolius (Reichard) Bässler, dans l’herbier CL sous le nom synonime Orobus tuberosus L.

Key words: Lathyrus linifolius, Roumanie

* University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania

Abstract: l’auteur publie les erreurs rencontrées dans les exsiccates: FRE = Flora Romaniae Exsiccata; FOE = Flora Olteniae Exsiccata; FMD = Flora Moldaviae et Dobrogeae Exsiccata; FEGL = Flora Exsiccata Graminearum et Leguminosarum Romaniae. En même temps, on publie le nom correct.

Key words: erreurs, exsiccates, Roumanie

* University of Agronomic Sciences and Veterinary Medicine, Bucharest, Romania

Abstract: l'auteur présente 6 espèces introduites par erreur dans la flore de Roumanie, qui se trouvent dans le dérniere traveau Liste critique des plantes vasculaires de Roumanie (A. Oprea 2005).

Key words: espèces erronées, flore de Roumanie

* University of Agricultural Sciences and Veterinary Medicine Iasi, Faculty of Agriculture, 3, Mihail Sadoveanu Street, Iasi, Romania
** Botanic Garden “A. Fatu”, 7-9, Dumbrava Rosie Street, Iasi, Romania

Abstract: Our field research in the last years, over the flora, vegetation and habitats, has been identified a number of 93 alien plant species which grow up in more or less disturbed habitats from the Stânisoara Mountains (Eastern Carpathians). These species are discussed regarding their impact to the ecosystems, immigration modes, invasive status, geographical origins, dispersal mechanisms, their distribution, principal infestation sites etc. The most dangerous alien species for anthropic, semi-natural and natural habitats in the investigated territory were identified.

Key words: vascular flora, alien plants, Stânisoara Mountains, Romania

* Botanic Garden “A. Fatu”, 7-9, Dumbrava Rosie Street, Iasi, Romania
** University of Agricultural Sciences and Veterinary Medicine Iasi, Faculty of Agriculture, 3, Mihail Sadoveanu Street, Iasi, Romania

Abstract: In the natural ecosystems from the Stanisoara Mountains (Eastern Carpathians), there have been identified a number of 145 rare vascular plant species, belonging to 98 genera and 38 families.

Key words: vascular flora, rare plants, Stanisoara Mountains

* “Anastasie Fatu” Botanic Garden, str. Dumbrava Rosie, no. 7-9, Iasi, Romania

Abstract: The paper presents aspects of the floristic diversity (Cormobionta) from Neagra Brostenilor river basin including approximately 900 taxa. The floristic conspectus includes species identified by us in 2005 – 2008 period and species published by others authors in speciality literature.

Key words: flora, cormophytes, Neagra Brostenilor

* Botanic Garden (Institute) Academy of Sciences Republic of Moldova

Abstract: Protected area Nemteni is situated in the bottom-grassland of the river Prut have the area of 20,9 ha and, attributed to the ecosystems which consist of Salix alba, Populus alba, Quercus robur. The investigations done during 2003-2006 periods had the target of study the floristic and phytocoenotic composition, elaborate optimal measures of biosafety and sustainable use. 168 species of vascular plant, classified in 46 fam. and 129 gen. were identified. 9 species of rare plants being on high endangered level were determined. Floristic composition from the biologic, ecologic, geographic, economic, cariologic point of view was analyzed. Vegetal community of 5 associations were attributed to Salicetum albae-fragilis Issler 1926; Populetum albae-Fraxinosum bessarabicum Borza 1937; Pruno spinosae-Crataegetum Soó 1931; Trifolio repenti-Lolietum Krippelova 1967; Lolio-Plantaginetum majoris (Linkola 1921) Berger 1930.

Key words: biodiversity, protected area, rare species

* Botanic Garden (Institute), Academy of Sciences Republic of Moldova

Abstract: The paper represents a synthesis of the investigation issues performed in Narnova River’s grassland during the 2006-2007 vegetation periods. Floristic and phytocoenotic composition of vegetation’s grassland was established. Floristic Inventory of Narnova River’s grassland includes 193 species, appertaining to 112 genus and 38 families. Flora was analyzed from taxonomic, bioform, geoelement, ecological index, economical importance points of view. 11 species with different endangered level were identified. Studied phytocoenosis appertain to 15 associations included into 10 alliances, 10 orders and 4 classes.

Key words: Narnova river’s grassland, floristic and phytocoenotic composition.

* Faculty of Biology, “Al. I. Cuza” University of Iassy, Romania

Abstract: The paper presents two hygrophilic associations in the upper basin of the river Dorna (district of Suceava): Epilobio-Juncetum effusi Oberd 1957 and Scirpetum sylvatici Ralski 1931, associations classified from the coenotaxonomic point of view in the class Molinio-Arrhenatheretea R. Tx. 1937.

Key words: phytocoenology, hygrophilic vegetation.

* “Alexandru Ioan Cuza” University, Faculty of Biology, Department of Plant Biology, Romania

Abstract: As a result of the researches carried out between 2005-2007 in The Natural Park Vanatori Neamt, we identified two association: Cytiso – Quercetum petraeae Pauca 1941 quercetosum dalechampii Chifu et al. 1995 and Corylo avellanae – Carpinetum quercetosum pedunculiflorae Chifu et Sârbu 2001. This article describes these associations by taking into consideration main aspects of chorology, ecology, physiognomy and floristic composition, biological forms, floristic elements, ecological indexes.

Key words: chorology, ecology, physiognomy and floristic composition, biological forms, floristic elements, ecological indexes

* “Alexandru Ioan Cuza” University, Faculty of Biology. B-dul Carol I, 20 A, Iasi, Romania

Abstract: This paper presents two associations from the Rhamno – Prunetea Rivas Goday et Borja Carbonell 1961 class and the Salicetea purpureae Moor 1958 class.

Key words: phytocoenology, bioforms, floristic elements, ecological indices

* “Anastasie Fatu” Botanic Garden, “Alexandru Ioan Cuza” University of Iasi, Romania

Abstract: The diversity of the natural habitats specific to Neagra Brosteni hydrographical basin have favoured installation of two different types of pine phytocoenoses. Although both of these plants communities are characteristic to acid substrata, one is specific to oligotrophic peat-bogs (Oxycocco – Sphagnetea) and the other to mountain versants presenting acidophilous soils and accentuated slopes (Vaccinio – Piceetea). These vegetal associations are presented in phytosociological tables and analysed in this paper from the bioforms, floristic elements and ecological requests perspectives.

Key words: vegetal associations, Pinus sylvestris, Neagra Brostenilor

* University of Pitesti, Faculty of Science, Pitesti, Romania

Abstract: The Leaota Mountains are well individualized, with special pastoral activities. Ecopedological conditions and the vegetation arrangement in tiers of the massif permitted the systematization of the types of meadows, on belts of vegetation: the superior mountain belt, subalpine and alpine one. After the phytocoenological investigations that have been done in this region of the Meridional Carpathians we discovered three vegetal associations from Juncetea trifidi class: Potentillo chrysocraspedae – Festucetum airoidis Boscaiu 1971, Oreochloo – Juncetum trifidi Szafer et al. 1927 and Cetrario – Loiseleurietum procumbentis Br. - Bl. et al. 1939.

Key words: plant associations, Leaota Massif, Romania

* Arges County Museum, 44 Armand Calinescu Street, Pitesti, Romania

Abstract: In this paper are presented two associations of megaforbs of Adenostylo-Doronicetum austriaci Horv. 1956 and Cirsio waldsteinii-Heracleetum transsilvanici Pawl. et Walas 1949, which were identified in the area of the Natural Reserve Pestera-Cocora-Valea Horoabei (Bucegi Natural Parc). There are also presented the species of plants found here and which are included in the Red List of the superior plants from Romania.

Key words: megaforbs, Horoaba Canyon

* Vegetable Research and Development Station Bacau, Romania
** USAMV Iasi, Faculty of Horticulture, Aleea Mihail Sadoveanu nr. 3, Iasi, Romania
*** USAMV Bucuresti, Faculty of Horticulture, Boulevard MARASTI nr. 59, Bucuresti, Romania

Abstract: Oregano is a perennial plant of 0,6 – 0,8m high. The flowers are small, coloured in red till lilac-lavender. It blossom from July till September, being pollinated by bees. The utility rate of plants is 3 : 5.
In the literature is mentioned as a plants with multiple uses: culinary (as a condiment plant or for the preparation of a aromatised tea, the leaves can be consumed fresh or cooked); ornamental (is decorative through port, bush and flowers: often is cultivated in pots); medicinal (is has an antiseptically and expectorant effects, being used also in affections of respiratory systems, indigestions, arthritis, aromatherapy etc); melliferous (is a good melliferous plant); in biologic agriculture (with repellent effect for insects, is recommended for association with many vegetable species, also because the plants cover very well the soil, thus providing an herbicide effect); cosmetics (perfume, soap, spay industry).

Key words: Origanum vulgare L., common name oregano, origami, arigan, marjoram belongs to Lamiaceae family and its origin habitat is Europe.

* The Resort of Research-Development for Legumiculture Bacau, Romania
** University of Bacau, Romania

Abstract: Origanum vulgare L. – oregano, is a perennial plant of 0.6 - 0.8 m, that belongs to the Lamiaceae family. Oregano is an important aromatic plant utilised both as culinary and medicinal plants. Tissue culture „in vitro” is a useful method for large scale production of pathogen-free plants. In this study in order to determine the best hormone variant that allows the obtaining of a large number of plants, apical shoots of young plants grown in controlled conditions were utilised. The explants were cultured in solid MS medium supplemented with different concentrations of kinetin – 1.0-2.0 mg/L and 1.0-2.0 mg/L BAP in combination with 0.1-0.5 mg/L NAA and IAA. Multiple shoots were obtained from the apical explants, the higher frequency (85%) formation of shoots was observed in the media variant that contained BAP in combination with NAA. Initially 1 or 2 buds developed, later up to 12 shoots of above 3 cm length were formed in node in two weeks. Shoots were multiplied by subculture on the same medium. The shoots rooted on the same media. The rooted plantlets were hardened and successfully established in pots at 85% success rate.
The reported experimental dates represents a viable methods of plant regenerations of Origanum vulgare L. through shoot tip culture.

Key words: growth regulators, Origanum vulgare, “in vitro”, morphogenetic reaction