We studied microsporangium wall structure in Trollius ledebourii Reischenb. The mature microsporangium has a 3 layer wall. Differentiation of its layers occurs centripetally, its correlation with periods of sporogenous tissue development was established. We first detected intermediate type of cells developing between meiocytes and tapetum during abnormal microsporogenesis. Dependence of pollen grains development abnormalities on tapetum and endothecium structure changes was revealed.
The results of anatomic investigation and overground organs of Arisaema amurensis Maxim. are represented. Th ese results may be used as the perspective for the introduction as the exotic and decorative culture. It is very interesting that tuberbulbs of these plants were covered with the significant coating tissue as the periderm of Dicotyledon plants.
Data about findings the new localities of the 7 rare and relict species ( Stipa desertorum , Helictotrichon altaicum , Allium nutans , Cotoneaster mongolicus , Stenosolenium saxatile , Rhamnus erythroxylon , Physochlaina physaloides ), of them 2 new species ( Allium nutans L., Stipa desertorums (Roshev.) Ikonn.) for flora of the Selenga Mountain in Western Transbaikalia of the Republic Buryatia.
On the territory of Taimyr southern tundra subzone (ST) 545 species of vascular plants are noted. Th e composition and structure of flora of the Western (W) and East (E) sectors of subzone are distinctly different, they are regarded as independent floristic regions. The share of arctic and east-asian species is greater in E flora, boreal and euroasian greater in W. The groups of characteristic species, marking northern and southern ST boundaries are detected.
The article presents the results of a study macromycetes on the territory of the Baikalo-Lenskiy Nature Reserve (Irkutsk region). In various communities and belts of the reserve 147 species of macromycetes have been found; out of them 132 species are new for the reserve, 45 species have been registered in the Irkutsk region for the fi rst time.
New species Viola taynensis T. Elisafenko was described with breach of International code of nomenclature for algae, fungi and plants (ICN). The lectotype of V. taynensis is designated.
The fruits and seeds of Hedysarum zundukii collected in two locations of its growth: at cape Zunduk and cape Khuzhir of West coast of Lake Baikal in 2007-2009 were studied. It was established that only 19-39 % of collected bean segments contained mature seeds depending on the year of collection and the place of its growing. Other segments were empty or contained damaged and immature seeds. It was supposed that beans and seed damage was caused by insects. Mature seeds needed scarification for germination, and germination was near to 55 %. It was shown for the first time that seed damage and delay of their maturation may be a significant limiting factor for the preservation of Hedysarum zundukii depending on the place of its growing.
A.V. Agafonov1, E.V. Kobozeva1, B. Salomon2 1Central Siberian Botanical Garden, SB RAS, 630090, Novosibirsk, Zolotodolinskaya str., 101 agalex@mail.ru. 2Swedish University of Agricultural Sciences, Department of Plant Breeding, P.O. Box 101 SE-23053 Alnarp, Sweden Bjorn.Salomon@slu.se
Keywords: Triticeae, Elymus, новый вид, Республика Алтай, Triticeae, Elymus, a new species, Republic Altai
A new species Elymus margaritae Agafonov, Kobozeva et B. Salomon ( Triticeae Dum.) from Altai Mountains (Republic Altai) is described. Data on morphology and some molecular and genetic characteristics of the species are provided. On morphological characters it is most closest to E. komarovii (Nevski) Tzvelev. By results of the ISSR analysis the close relation E. margaritae with StY-genomic species E. fedtschenkoi Tzvelev and E. abolinii (Drob.) Tzvelev was revealed. The new species is distributed on the Krasnaya Mountain (Ust-Koksinsky dist.), Katunsky Range and Ukok Plateau. The chromosome number 2 n = 4 x = 28 was specifi ed.
The characteristics of the new syntaxa of forest meadows from subtaiga subzone of West-Siberian Plain (Ob-Irtish watershed): two associations ( Vicio unijugae-Dactyletum glomeratae and Veronico chamaedryos-Dactyletum glomeratae ), two subassociations ( Dracocephalo ruyschiani-Heracleetum sibiricae fi lipenduletosum stepposae and Geranio bifolii-Brachypodietum pinnati paeonietosum anomalae ) and community Heracleum sibiricum were given. All these syntaxa belong to the order Carici macrourae-Crepidetalia sibiricae of the class Molinio- Arrhenatheretea .
Th e classification of vegetation highlands of north-western and south-eastern parts of the Kurai Ridge was performed. The characteristics of the selected syntaxa. Described a new association - forb mesophilic alpine meadows - communities that are spread on the border of Central and South-Eastern Altai.
