According to the results of our previous investigation of the key plots, within the mountain natural forests at the territory of the NNP “Synevir”the state of these primeval forests is reflected in several essential peculiarities including the presence of the rare herbaceous species but absence of the allochtonous plants and the wide spectrum of the associations.

In the article shown the results of chorological researches, coenotic features and age structure of  9 coenopopulations Astragalus dasyanthus – rare specias, that are  listed on the  World Red list, European Red list and the Red Book of Ukraine in the steppe cenosis  in the river Vorskla catchment (Belgorod region, Russia; Poltava region, Ukraine).

The results of comparative studies of leaves` apparatus formation in some peach varieties which belong to the different ecologo-geographical groups and ecotypes have been given. It has been shown that formation of the leaf surface influences on the display of photosynthesis activity of the complex of structures which take part in the initial processes of the light energy transformation. Morphophysiological indexes of the different peach varieties that most objectively characterized photosynthesis productivity depending of variety and ecological properties of their leaves` apparatus have been shared out.

Investigation results of formation processes of the generative structures, features of the pollination, fertilization and embryogenesis of the Fumana procumbens have been presented.

This paper presents the results of a comparative analysis of flora with respect to different kinds of landscapes in the Pivnichne Prychornomoria (Northern Black Sea Coastal Plain). The significant role played by synantropization in the differentiation of flora is discussed.

The data about 104 species of lichenized and 7 species of lichenicolous fungi of Black sea region are given. 30 from them are new for this territory, 17 – excluded from list of lichen biota of reserve. Xanthoria monofoliosa S.Y. Kondr. et Karnef. – is a new species for Ukraine. The species are arranged on the reserve areas Ivano-Rybalchansky, Volyzhyn forest, Tendrivska Kosa, Solenoozerny, Yagorlytsky Kut and Potievka.

The results of morphological and molecular genetic studies of green algae Scotiellopsis levicostata(Scenedesmaceae, Chlorophyceae), found on the territory of Ukraine and put into a collection of cultures of Kyiv National Taras Shevchenko University (strain ACKU 928-10) have been represented . For partial nucleotide sequences of nuclear 18S rDNA gene set the position Scotiellopsis levicostatawithin clade «Coelastrella» was set. Taxonomic status of the species and its phylogenetic relationships within the clade «Coelastrella» are discussed.

Two hundred and eight species of aphyllophoroid fungi (Basidiomycota) were revealed by us in “Iziumska luka” Regional Landscape Park and vicinities (Ukraine, Kharkiv region, Steppe natural zone) during 2007-2010. Of them, 202 species are firstly reported for the research area. Fourteen species are revealed for the first time in Ukraine. They are Athelia bombacina (Link) Pers., A. salicum Pers., Boidinia furfuracea (Bres.) Stalpers et Hjortstam in Hjortstam et Stalpers, Ceraceomyces tessulatus (Cooke) Jülich, Hypochnicium geogenium (Bres.) J. Erikss., Loweomyces fractipes (Berk. et M.A. Curtis) Jülich, Phellinus rhamni (Bondartseva) H. Jahn, Piloderma lapillicola Jülich, Sistotrema resinicystidium Hallenb., S. sernanderi (Litsch.) Donk, Trechispora praefocata (Bourdot et Galzin) Liberta, Tulasnella pinicola Bres., T. pruinosa Bourdot et Galzin and Vuilleminia cystidiata Parmasto.In the case of 4 species, i.e. Fibriciellum  silvae-ryae J. Erikss. et Ryvarden, Hyphodontia tuberculata Kotir. et Saaren., Sistotremella hauerslevii Hjortstam and Trechinothus smardae (Pilát) E.C. Martini et Trichies, “Iziumska luka” is the first and still single area of occurrence reported from the Eastern Europe. Together with 1 species known from the research territory before our study, the total list of aphyllophoroid fungi of this forest massif now comprises 209 species and is presented in the paper with information on their substrata. Remarks are provided both for taxonomically and mycofloristically important records.

Mycelium dikaryotic cultures of Sch. commune unlike monokariotic has almost twice the width of hyphae, formed colonies more dense with well-developed aerial and submerged mycelium are found. Electrophoretic studies endoenzymes systems allow us to identify dominant monokariotic culture with joint growth on the single substrate.

The five strains of Chlamydomonas applanata in immotile stage in a culture on agar medium were investigated. The main morphological features of Ch. applanata which distinguished this species from other species of genus Сhlamydomonas s.l. were established. The main features are: a) the absence of central triplet cell wall multiplication; b) the presence of colonial mucilage sporangium origin; c) continuous starch sheath of pyrenoid; d) the presence of red spherical akinetos-like cells and spherical green zygotes with thickened smooth wall; e) the presence of rudimentary flagella in zoospores in sporangia.

Diversity and distribution of obligate parasitic fungi belonging to the orders Albuginales, Erysiphales, Peronosporales and Pucciniales on the territory of eight parks and six public gardens of Odessa have been studied. As a result  80 species have been found, among them three species belonged to Albuginales, 39 – to Erysiphales, 22  – to the Peronosporales and 16 species to the  Pucciniales. These fungi parasitized 108 species of host plants belonging to 91 genera and 40 families. The list of recorded fungi and their hosts is presented.

Checklist of Bryobionta of Ukraine (2008) is supplemented by 15 species, whose data appeared after its publication. Of them 3 species of Marchantiophyta division – Riccia beyrichiana Hampe ex Lehm., Riccia crinita Hoffm., Riccia erinacea Schiffn and 12 species of Bryophyta division – Lazarenkia kozlovii (Lazar.) Boiko, Aulacomnium arenopaludosum Boiko, Bryum badium (Brid.) Schimp. Сampylopus introflexus (Hedw.) Brid., Fissidens exiguus Sull., Grimmia fuscolutea  Hook., Myrinia pulvinata  (Wahlendb.) Schimp., Plagiothecium ruthei Limpr., Pohlia proligera (Kindb.) Lindb., Schistidium elengatulum Blom, Syntrichia laevipila Brid.,  Zygodon dentatus (Limpr.) Kart.View Pohlia andrewsii J. Shaw must be excluded from Cheklist of Bryobionta of Ukraine.

The authors review the arguments for creation of nation-wide value landscape reserve Zelena Valley (Kryvyi Rih Region). We characterized rare vegetation and flora and proposed original criteria for that. It allowed us to estimate the sozological value of Zelena Valley landscape system.