Some results of research of the bluegrasses (Poa L.) of section Stenopoa Dumort in extratropical Asia

The research has shown, that the section Stenopoa Dumort of the genus Poa L. are presented in extratropical Asia by 50 species.

To the study of alien species in the flora of Khakassia

As a result of the field studies, analysis of publications and herbarium materials, it has been established that by now the alien flora of the Republic of Khakassia includes about 140 species of vascular plants. Of this number, more than 30 species are invasive plants included in the “Black Book of Flora of Siberia” (2016). In recent years, there has been both a fairly rapid replenishment of the flora with alien plants and a noticeable dispersal of a number of invasive species across the territory of Khakassia. For the purpose of monitoring alien plant species, we use the capabilities of the international scientific network iNaturalist.org.

Approaches to formation of northern regions species list for preparing new edition of Krasnoyarsky Region Red Book (plants)

Because of preparing new edition of “Krasnoyarsky Region Red book (plants and fungi)”, the change of approaches to formation of specially protected vascular plants list are proposed. The changes of principles for adding species to this list are proposed, as well as offers by including and excluding the species. In particular, conferring conservation status is necessary not only for species at whole, but for separate large populations. The special approaches is necessary for species, hard to definite in nature. Besides, it is necessary to supplement new edition by Appendix “The list of Krasnoyarsky Region plant species needing special attention by their condition in nature”.

The spatial-and-temporal differentiation of the soil temperature and its influence on vegetation in the exposure-related forest-steppe of Transbaikalia

The long-term soil temperature monitoring in the area of more than 550 km in length within the region of Transbaikalia has been carried out. Sites for the monitoring were represented by the forest-steppe vegetation of different ecotopological and ecogeographical patterns. It was revealed that the dynamics of temperature regimens are highly synchronized reflecting the macroclimatic unity of the region. The sufficiently higher heat supply on the southerly exposed slopes comparing to northerly exposed ones was demonstrated. The distinctness between soil temperature regimens in different sites was revealed and attributed to the size of forested patches within the forest-steppe landscape, as well as discrepancies between eco-geographical features of sites along the sublatitudinal gradient. Differences between the vegetation types that occurred on the northern and southern slopes as well as between key sites scattered throughout the region were underlined. These differences are suggested to be connected with the spatial differentiation of the soil temperature. It was established that vegetation on the southern slopes is relatively more homogeneous being related to the single class Cleistogenetea squarrosae, while on the northern slopes plant communities related to three classes were developed, namely steppe class Cleistogenetea squarrosae, and two forest classes – Rhytidio-Laricetea and Vaccinio-Piceetea.

Dynamics of species composition of alas vegetation during demutation

Change of species composition of degraded alas pastures vegetation in process of restoration is considered.

Florogenesis value of hybrids

Hybrids are known for all types of higher plants. They differ in the size of their habitats and ecological modes of growth. Analysis of these parameters allows us to determine the time of their occurrence and characterize individual moments of florogenesis of territories where hybrids originated.

State and prospects of development of the Herbarium of the Kuzbass Botanical garden (KUZ)

The history of the formation of the Herbarium of the Kuzbass Botanical Garden (KUZ) is given. The modern structure of the Herbarium collections (KUZ) is described. The directions of research carried out at the present time, the initial results of digitalization of herbarium collections are presented.

Sub-recent palynological spectra of landscapes of the Yamalo-Nenets Autonomous Area, Russia

An analysis of the composition of surface spore-pollen spectra (SPS) was carried out within a gradient from forest-tundra to northern taiga. In total, 20 sub-recent moss-lichen surface samples were obtained on the territory of the Nadymsky and Purovsky districts of Yamalo-Nenets Autonomous Area. All studied spectra contain pollen of Larix sibirica Ledeb., Picea obovata Ledeb., Pinus sibirica Du Tour, P. sylvestris L., Betula pubescens Ehrh., B. nana L, as well as Ericaceae, Asteraceae and Cyperaceae. In the SPS of the studied communities, an increase in the participation of the pollen of Pinus species, a decrease in the content of Betula nana pollen, and an increase in the diversity of the taxonomic composition of herbs at the transition from the forest-tundra to the northern taiga are observed. The low content of Picea obovata pollen in the forest-tundra and northern taiga spectra reflects the low proportion of spruce in the studied communities. The low pollen proportion of Larix sibirica in the forest-tundra and northern taiga does not reflect the actual participation of L. sibirica in the vegetation cover, but is associated with rapid destruction of pollen and its low flight ability. The low content of Larix sibirica pollen in the forest-tundra and northern taiga does not reflect the actual participation of larch in the stand.

Plant communities of the Middle Lena in need of protection

The results of the study of rare communities in the middle reaches of the Lena river valley, one of the most floristically rich regions of Yakutia, are presented. There are grow populations of 81 species of vascular plants listed in the regional Red Book. Populations of 35 species are covered by various types of protection. Five populations of endemic plants of the North-East of Russia, 13 species living on the northern limit of their ranges, and 3 endemic plants of the Central Yakutia were not included in protected areas (PAs). The relict steppe communities with Artemisia martjanovii Krasch. ex Poljak., Krascheninnikovia ceratoides (L.) Gueldenst., Hedysarum gmelinii Ledeb., Astragalus lenensis Shemetova, Schaulo et Lomon. are under threat of complete extinction.

The effect of physical mutagenic factors on some quantitative traits in the generation of M2 Sesamum indicum L.

Induced mutagenesis is considered an effective and potential method for generating genetic variation in agricultural plants. The paper presents data on the influence of this physical factor on the quantitative parameters in the M2 generation of sesame samples from Zaltsadovski, Kadet, Adaptovanii 2 at a dose of 200, 300, 400 and 500 Gy (Gray). According to the results obtained, the variability of some features was revealed, which varied depending on the sample and the applied radiation dose. The greatest changes in indicators compared to control were found in the genotypes Kadet at a dose of 300 Gy and Adaptovanii (200 Gy). The spectrum of morphobiological changes in plants will also be assessed in the M3 generation.