Home – Home – Jornals – Flora and Vegetation of Asian Russia 2020 number 2

The analogues of Pleistocene tundra-steppe (mammoth steppe) vegetation are shown to dwell in Altai arid high mountains (plateau Ukok): contemporary tundra-steppes and cryophytic steppes prevail in low part of alpine belt. Within fl oristic classification framework tundra-steppe communities were ascribed to class Carici rupestris-Ko bresietea bellardii Ohba 1974, cryophytic steppes - to class Cleistogenetea squarrosae Mirkin et al. 1992. New alliance Stellario petraeae-Festucion tschujensis Makunina was outlined. It unites cryophytic steppes of South Siberia mountains.

The results of detailed SEM study of fruits morphology, surface of fragmocarp and pericarp sculpture of mericarp of five eurasian species of the section Aparinoides оf the genus Galium (Rubiaceae): Galium palustre , G. trifi dum , G. ruprechtii , G. baicalense , G. brandegei from Asian Russia. The studied species have glabrate surface of mericarp. Three types of pericarp sculpture revealed: netted, netted vaguely and wrinkled, and ultrasculpture of cells surface are of the same type: folded.

In the north of Tajikistan, shoot formation and ontogenesis of a dwarf subshrub Ziziphora suff ruticosa Pazij et Vved. (Lamiaceae) were studied. It was established that ontogenesis of individuals is simple, incomplete, its duration is at least 20-25 years. In individuals, the polytivariance of ontogenesis was revealed, expressed in diff erent rates of development and omissions of the immature and virginal ontogenetic states. The description of shoot formation was showed that the specimen is characterized by a bazi-simpodial growth and the formation of the life form of a dwarf subshrub. The ontogenetic structure of six coenopopulations on the Kuraminsky and Mogoltau ranges was studied. Self-preservation of coenopopulations occurs exclusively by seed. Density does not exceed 3.7 individuals per 1 m². In the studied coenopopulations, two types of spectrum are formed: centered with a peak in mature generative individuals and right-sided with a peak in old generative ones. The latter type of spectrum is formed under a strong anthropogenic load. All coenopopulations by demographic indicators are characterized as mature, stable.

Antimicrobial activity of extracts from the above-ground part of Monarda fi stulosa L. with respect to fi ve strains of gram-positive pathogenic bacteria was analyzed. High antimicrobial activity of the water-ethanol extracts against Bacillus cereus ATCC 10702 and B. subtilis ATCC 6633 throughout the growing period was established. Antimicrobial activity against Staphylococcus haemolyticus 1700 MRS, Enterococcus faecium ATCC 19434 and B. cereus ATCC 14579 varied during the growing period from a complete absence to a high degree of activity. Th e antimicrobial activity of the M. fi stulosa extracts was influenced from the development phase, method of preparing the extracts and their concentration, as well as by the specificity of the strains.

Data on new locations of rare and protected lichen species of the Republic of Sakha (Yakutia) are presented: Asa hinea scholanderi , Lichenomphalia hudsoniana , Lobaria isidiosa , Masonhalea richardsonii , Melanelixia alberta na , Parmelia schinanoana , Usnea longissima. For each species, information on the location, collector, sample number in the lichen herbarium of IBPC SB RAS (SASY-L) is specified. Summarizes information about the samples of the species, previously discovered on the territory of Yakutia, data of the specimens in the herbarium SASY-L, LE, Н.

A comparative characteristic of the effectiveness of two growth regulators (Tellura-M and Artemia) in green cuttings of Ribes atropurpureum is given. It was found that humic fertilizer 1 % Tellura-M and organomineral fertilizer Artemia, in a concentration of 1:1000 are highly effective stimulators of rhizogenesis of green cuttings of Ribes atropurpureum . These regulators provide a high percentage of rooting cuttings and contribute to the formation of a well-developed root system.

The relationship between the seasonal development features of 213 plant species introduced into the conditions of the southern taiga and the results of their introduction was studied. With the increase of the duration of vegetational period the success of the introduction оf species was statistically significantly rised. Spring-summerautumn-winter-green species were the most promising: in these species the more intensive seed and vegetative reproduction and increased duration of flowering were observed. The prospectivity of introduction of species with early start of growing season (in the second and third decades of April), flowering (in May) and with long fl owering (more than two months) was the highest. In species from another regions the regrowth of plants, fl owering and seed ripening were beginning significantly later than in species of local flora. In species growing in nature in more severe climatic conditions, these phenophases under conditions of introduction were beginning earlier.

A local population of rare endemic species Saussurea ceterachifolia Lipsch. included in Red Data Books of Tyva Republic and Russian Federation was found in the South-Western Tyva.