Home – Home – Jornals – Flora and Vegetation of Asian Russia 2018 number 2

The cellular organization of the mesophyll of leaf blades of coastal-aquatic plants is considered on the example of nine species from the families Juncaceae , Cyperaceae , Poaceae and Typhaceae . It is shown that the basis of the assimilative tissue of the above-water leaves in most plant species is the palisade parenchyma, represented by cells of different spatial configurations. Columnar cells of cylindrical shape with round or slightly oval bases are characteristic for plants of the families Juncaceae , Cyperaceae , Typhaceae , in the representatives of the Poaceae family, the palisade tissue is formed both by cells of simple and complex cellular contours. In this case, common features are found in the three-dimensional structure of the complicated forms of cells of the inner layers of the mesophyll in species from the families Poaceae , Cyperaceae , and Juncaceae .

The article contains information about the type materials for 27 taxa from 6 genera of the family Rosaceae kept in M.G. Popov Herbarium of the Central Siberian Botanical Garden SB RAS (NSK), Herbariums of the Komarov Botanical Institute (LE) and Moscow State University (MW). The type category is indicated, text of the original label and text of protologue are cited for each specimen. 88 type specimens were found in collections, including 5 lectotypes, 11 isolectotypes, 7 holotypes, 12 isotypes, 7 syntypes and 46 paratypes. Lectotypes for name of 3 taxa were designated: Chamaerhodos baicalensis Popov, Potentilla adenotricha Vodopjanova, P. ozjorensis Peschkova. Information about the 4 holotypes, 2 lectotypes, 2 paratypes from Herbarium LE and 41 isotypes from the largest virtual herbarium of the world are cited.

A cluster analysis of 39 local floras of the Putorana, Kotui and Anabar plateaus was carried out. Th ree large phytochoria of the rank of floristic regions were singled out. Their regional flora differ in their taxonomic composition, geographic and ecologo-cenotic structure. Differences are due to climatic conditions, geological structure and historical reasons.

The populations structure of Aconitum krylovii Steinb. and Aconitum septentrionale Koell was studied in the pine forest in Altai mountains. Cenopopulations of both species is normal, young, with ontogenetic spectrum left -side type. Density in A. krylovii cenopopulations loci varies from 5.1 to 9.4 adults per 1 sq. m, increasing in the middle part of the slope. The sprouts density is insignifi cant. The self-maintenance of the cenopopulation is mainly vegetative. Density in A. septentrionale cenopopulations loci is low, 2.3-2.6 adults per 1 sq. m, the seedage is suppressed. The more favorable conditions for the species is at the bottom of the slope.

Our researches were carried out in 6 river valleys of Salair Ridge. Landscapes formed by gold dredge are characteristic for studied area. One of typical landscapes are post-dredge reservoirs. We have compared the coenoflora of natural and post-dredge water reservoirs and have noticed their signifi cant difference. Both of them are characterized with Equisetum fl uviatile or Typha latifolia, which determine similar appearance, however the set of other species is diff erent. This fact is confirmed by their different ecological spectra, so newly created reservoir have another ecological characteristics and another succession status.

The syntaxonomic diversity of steppe meadows from steppe zone of North Kazakhstan was revealed. It is represented with 4 associations, 5 subassociations and 1 variant belonging to two alliances and two orders of the class Festuco-Brometea . 3 associations, 4 subassociations and 1 variant were described for the first time. Th e fl oristic peculiarities and distribution of these syntaxa were discussed.

The ISSR fingerprinting of the twelve Trollius species ( Ranunculaceae family) was used in order to establish its inter-species relationships. Based on 116 ISSR markers obtained by PCR amplification with four ISSR primers three divergent groups of species were revealed: european, siberian and far-eastern. According to the ISSR data the species T. altaicus , T. asiaticus , T. kytmanovii , T. sajanensis , have close genetic relationships, therefore introgressive hybridization between these species is permitted. The greatest genetic distance ( D = 0.428) was determined for the species T. sajanensis and T. vicarious and the smallest distance ( D = 0.091) for T. altaicus and T. asiaticus . Based on ISSR profile all individuals of T. sajanensis have been treated as hybrids.