Ivan A Schanzer - Academia.edu (original) (raw)

Papers by Ivan A Schanzer

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Salix fursaevii, a species endemic to the Volga River flood plain, was described by E. Mavrodiev ... more Salix fursaevii, a species endemic to the Volga River flood plain, was described by E. Mavrodiev and co-authors in Byull. Moskovsk. Obshch. Isp. Prir. in 2012. It differs from the closely related and widespread S. triandra by a few quantitative morphological characters and, most of all by its much later flowering time. This late-flowering willow was known and studied before as an ecotype of S. triandra. Our study of a large sample of S. triandra s. l. revealed that 1) S. triandra s. str. and S. fursaevii could not be clearly distinguished using several morphological characters and the time of flowering; 2) specimens morphologically corresponding to S. fursaevii are with a single exception strictly confined to the Volga River flood plain; 3) the populations of S. triandra and S. fursaevii do not differ by nrITS sequences; 4) the populations of S. triandra and S. fursaevii are poorly differentiated by chloroplast atpB-rbcL sequences; 5) representatives of both taxa are tetraploids 2n ...

Studies of invasive species and invasion processes have been gaining momentum abroad and in Russi... more Studies of invasive species and invasion processes have been gaining momentum abroad and in Russia. A recent advancement has been the development of the Global Invasive Species Programme (GISP) and global database of invasive species DAISIE (Delivering Alien Invasive Species Inventories for Europe) along with the establishment of specialized working groups investigating the impact of invasive species on ecosystems and elaborating measures for their control (Vinogradova et al., 2010). The United States is where this direction of research has been developed the most due to the seriousness and profoundness of the economic and ecological consequences of its plant invasions (Slife et al., 1960). At the University of Texas, the Institute for Biological Invasions has been organized along with a magazine Biological Invasions. Similarly, a Russian database AliS (Alien [plant] Species) has been established. It summarizes data and enables generalizations regarding adventive species within concrete territories in Eastern Europe as well as assessments of their impact on ecosystems; it also provides opportunities for developing predictive models forecasting possible future invasions (Morozova, 2002). Of critical importance are invasive species categorized as quarantine weeds: aggressive and harmful weeds, which, at the same time, inflict serious damage to human health due to the allergenic properties of their pollen. To this category belong representatives of the genus Ambrosia L.: giant ragweed (A. trifida L.), perennial ragweed (A. psilostachya DC.), and common ragweed (A. artemisiifolia L.). These species constitute priority targets for invasion control within the territory of European Russia (Dgebuadze, 2014). Despite all the work undertaken in order to prevent their advancement, ragweeds have become ubiquitous weeds and are actively spreading to new regions, especially those that are densely populated. Ragweeds are native to North and Central America (Slife et al., 1960). They are widespread in the United States, especially in the eastern and central states (Srother, 2006) and in Canada, being particularly abundant in the southeastern provinces, Ontario and Quebec References Abramova, L.M. 1997. Ambrosia artemisiifolia and Ambrosia trifida (Asteraceae) in southwestern Bashkortostan Republic. Bot. Zhurn. (Moscow & Leningrad) 82(1): 66-74. (In Russian) Abramova, L.M. 2011. Classification of plant communities with participation of invasive species. 1. Communities involving species from the genus Ambrosia L. Rast. Rossii 19: 3-29.

Moscow University, the places where Alexey Konstantinovich worked for most of his life. The Confe... more Moscow University, the places where Alexey Konstantinovich worked for most of his life. The Conference talks were presented in three oral sessions. The first session was mainly devoted to the problems of plant invasions, but also some topics in such areas as palinology and plant morphology. An exciting historical investigation into Prof. Skvortsov's field studies on the flora of Ryazan Region in Russia was presented by Prof. Marina Kazakova at the end of the session. The second session was held after lunch and included a variety of talks on plant introduction, reproductive biology, and conservation, problems that A.K. Skvortsov paid much attention to when working at the botanical gardens both of Moscow University and the Academy. This session started with a talk by colleagues from Moscow University that revealed a lot of interesting facts about Skvortsov's life and his role in planning and starting the University botanical garden. 258 The third session, in the evening, was s...

by the Moscow Branch of the Russian Botanical Society and supported by the Main Botanical Garden ... more by the Moscow Branch of the Russian Botanical Society and supported by the Main Botanical Garden and Moscow University. This time the Conference gained partial support from the Russian Foundation for Basic Research. As it was with the preceding conference, and in contrast to the earlier ones, the topic was limited to just one of Prof. Skvortsov's areas of interest. The 2017 Conference was entitled Microevolution and hybridization among plants and animals. While the previous conferences were just brief one-day meetings, this one was held in a two-day format. Appreciating the fact that Prof. Skvortsov was not only a famous botanist, but had started his scientific career as a medical man and zoologist, the organizers decided to widen the conference format, inviting zoologists to discuss the shared common problems of organic evolution. The 6 th Conference gathered botanists, zoologists, and ecologists, 58 in all, from Moscow, St. Petersburg, Chelyabinsk, and Paris (France), who presented their talks and took part in discussions. The talks were dedicated to subjects spanning microevolution per se to phylogeography, phylogeny at low taxonomic levels, and spontaneous and artificial hybridization. Most of the speakers were, as usual, from the Main Botanical Garden and Moscow University, the institutions where Alexey Konstantinovich worked for most of his life. The Conference talks were presented in seven oral sessions that lasted for two days and started with a plenary session: two general talks devoted to Skvortsov's heritage. One of them, given by Dr. Ekaterina Tkacheva from the Main Botanical Garden Library, was entitled The works by A.K. Skvortsov in the world's informational space. This was an analysis of references to Skvortsov's works and the impact of his ideas upon modern science. The other one, by Dr. 5 Larisa Kramarenko, dealt with the microevolution of Prunus persica Mill. in Moscow Region during a 33-year period. The following three sessions were devoted to various aspects of microevolution, phylogeoraphy, and hybrid speciation in plants. The first day finished with an exciting talk by Dr. Liudmila Ozerova on a trip to Madagascar, a hotspot of species diversity, followed by the conference dinner. The second day started with a session on hybridization in natural populations of native and alien plants. The second session of the day was mostly zoological and included excellent talks by Dr. Natalia Abramson on differentiation and cryptic speciation in rodents in Northeastern Palearctic and by Dr. Vladimir Gokhman on problems of the species-level taxonomy in parasitoid Hymenoptera. The remaining two sessions dealt mostly with hybridization and cryptic speciation in plants, including hybridization in cultivation. Abstracts of all the talks, translated from Russian by Irina Kadis, are presented below.

Nordic Journal of Botany, 2021

Phylogenetic relationships of East Asian representatives of the genus Filipendula Mill. (Rosaceae... more Phylogenetic relationships of East Asian representatives of the genus Filipendula Mill. (Rosaceae-Rosoideae) as revealed by the analyses of nrITs markers do not completely coincide with either of the existing taxonomic systems of the genus. The NW American F. occidentalis (s. Watson) Howell is a strongly isolated species which is not closely related to the Asian representatives of the genus. This study confirms close phylogenetic relations between F. tsuguwoi Ohwi (endemic to s Japan) and F. kiraishiensis Hayata (endemic to Taiwan), as well as their relationships to F. multijuga Maxim. (endemic to Honshu Island, Japan). This clade also includes the Himalayan species F. vestita Maxim. Two widely distributed species, F. camtschatica (Pall.) Maxim. and F. glaberrima Nakai, appear to be related to members of the sect. Albicomae. Filipendula formosa Nakai, a narrow endemic to s Korea, seems to be basal to this clade. Filipendula yezoensis H. Hara, endemic to Hokkaido Island, Japan, which...

Plants, 2021

The Mediterranean region is a center of species and genetic diversity of many plant groups, which... more The Mediterranean region is a center of species and genetic diversity of many plant groups, which served as a source of recolonization of temperate regions of Eurasia in Holocene. We investigate the evolutionary history of species currently classified in Lotus sect. Bonjeanea in the context of the evolution of the genus Lotus as a whole, using phylogenetic, phylogeographic and dating analyses. Of three species of the section, L. rectus and L. hirsutus have wide Mediterranean distribution while L. strictus has a disjunctive range in Bulgaria, Turkey, Armenia, Eastern Kazakhstan, and adjacent parts of Russia and China. We used entire nuclear ribosomal ITS1-5.8S-ITS2 region (nrITS) and a plastid dataset (rps16 and trnL-F) to reconstruct phylogenetic relationships within Lotus with an extended representation of Bonjeanea group. We analyzed the phylogeographic patterns within each species based on the plastid dataset. For divergence time estimation, the nrITS dataset was analyzed. Our re...

Plants, 2020

The results of a molecular genetic study of Potentilla multifida agg. using two plastid markers (... more The results of a molecular genetic study of Potentilla multifida agg. using two plastid markers (ndhC-trnV and psbA-trnH) and a nuclear ITS marker suggested that this group comprises a number of relatively young and incompletely differentiated species widely distributed in Northern Eurasia. The sequences were analyzed using tree-based (maximum likelihood) and network-based (statistical parsimony network) approaches. The plastid data suggested incomplete lineage sorting, characteristic of the group as a whole. The nuclear ITS results demonstrated quite a different pattern, with mostly conspecific accessions shaping monophyletic clades. The majority of the Potentilla sect. Multifidae species studied possess few, usually closely related plastid haplotypes, or are even monomorphic. In contrast, P. volgarica, a narrow endemic from the Volga River valley, presents plastid haplotypes belonging to two distantly related groups. Such a pattern of genetic diversity in P. volgarica may be expla...

Acta Societatis Botanicorum Poloniae, 2020

In the cold periods of Quaternary climatic fluctuations, many temperate species underwent severe ... more In the cold periods of Quaternary climatic fluctuations, many temperate species underwent severe range contractions, and their survival during these periods was associated with climatically more favorable regions, so-called glacial refugia, from which subsequent range expansions took place. In this regard, the relative roles of the Southern (“main”), Northern (i.e., cryptic northern), and Eastern European (e.g., Colchis) refugia in shaping the evolutionary history of European temperate plants should be evaluated. In this study, we investigated the phylogeographic structure of Primula vulgaris, a European mesophilous species, by comparing DNA sequences derived from the nuclear (nrITS) and the plastid (trnL-trnF and rpl32-trnL) genomes of specimens covering the entire distribution range of the species. The variability in flower morphology was also studied on an area-wide scale with geometric morphometry. Our results clearly show the importance of the northern and eastern refugia (the ...

Plant Systematics and Evolution, 2020

The extent of glacial survival of woody plants in temperate Asia is still poorly known. A reliabl... more The extent of glacial survival of woody plants in temperate Asia is still poorly known. A reliable way to clarify this issue in the absence of sufficient paleontological data is a phylogeographic analysis of contemporary populations. A recent study of Juniperus communis genetic diversity in Eurasia suggested that this species with wide ecological tolerance survived the glaciation in many periglacial microrefugia at high latitudes and subsequently spread to new areas during interglacials

Phytotaxa, 2020

Rosa × archipelagica is a spontaneous hybrid between Rosa rugosa and R. maximowicziana distribute... more Rosa × archipelagica is a spontaneous hybrid between Rosa rugosa and R. maximowicziana distributed, together with its parental taxa, on the coast of a small Stenina Island in the Peter the Great Gulf, the Sea of Japan (Russian Far East). Its hybrid origin is confirmed by direct electropherogram comparisons of PCR products and maximum likelihood analyses of nuclear ITS 1–2 and plastid intergenic spacers trnH–psbA and ndhC–trnV. The plastome markers indicate R. maximowicziana as the maternal genome donor of Rosa × archipelagica, however, one specimen shows also signs of heteroplasmy. This is the first evidence of possible biparental inheritance of plastids in rose hybrids. The results do not show whether the hybrid plants all belong to F1 or further generations of hybrids.

BIO Web of Conferences, 2018

The article examines the genetic diversity in 54 populations of 9 Chondrilla species (C. acanthol... more The article examines the genetic diversity in 54 populations of 9 Chondrilla species (C. acantholepis, C. ambigua, C. brevirostris, C. canescens, C. graminea, C. juncea, C. laticoronata, C. latifolia, and C. pauciflora) in European Russia. Plastid DNA segments trnT–trnF are selected as markers. Reconstruction of evolutionary networks based on the principle of maximum parsimony reveals that the sample is divided into four groups, where group 1 is C. ambigua, 2 – C. brevirostris, 3 – C. laticoronata, 4 – C. acantholepis, C. canescens, C. graminea, C. juncea, and C. latifolia. The findings show that C. acantholepis, C. canescens, C. graminea, C. juncea and C. latifolia are to be treated as synonyms under the name of C. juncea.

Botanical Journal of the Linnean Society, 2018

Nordic Journal of Botany, 2019

This article has been accepted for publication and undergone full peer review but has not been th... more This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Aquatic Botany, 2018

Possible routes in which aquatic plants have spreaded across their vast ranges from ancestral are... more Possible routes in which aquatic plants have spreaded across their vast ranges from ancestral areas and refugia still remain poorly known. We have chosen Eurasian yellow water-lilies (Nuphar Sm. sect. Nuphar, Nymphaeaceae) as a model group for a wide-scale phylogeographical study as they represent a common component of the continental freshwater flora. To elucidate the history of diversification of the section Nuphar, we sequenced nuclear ribosomal ITS and chloroplast intergenic spacers (trnH-psbA, trnL-trnF) from 117 localities from almost all the section area. Sequence data were analysed with a statistical parsimony approach using the network algorithm. We also incorporated data on morphological variation and pollen viability. The section Nuphar originated and diversified into several evolutionary lineages in Eastern Asia. Two lineages, represented by N. pumila and N. lutea, spread from the Russian Far East westwards to Siberia and further to Europe. Nuphar pumila also migrated from the Far East to North America (where it is referred to as N. microphylla). Nuphar lutea colonized deglaciated northeastern Europe not only from the south, but also from the Siberian refugia. Nuphar lutea and N. pumila hybridize rarely in Eastern Europe and Asia and warrant species status. We provide the first evidence, based on a phylogeographical approach, for the origin and diversification of aquatic flowering plants in Eastern Asia. Our results indicate that phylogeographic analysis on the area-wide scale is one of the most efficient ways to deduce possible routes in which aquatic plants have spread across their total range from ancestral areas and refugia.

Russian Journal of Genetics, 2017

⎯Variability of M. arvensis from five geographically distanced populations was examined using mor... more ⎯Variability of M. arvensis from five geographically distanced populations was examined using morphological traits and phytochemical composition of essential oil and with the help of DNA fingerprinting using ISSR markers. The population differentiation based on morphological traits was weak. Analysis of the essential oil composition provided the subdivision of the sample into three groups and, on the basis of the composition of ISSR amplicons, into four groups of specimens. A high degree of genetic polymorphism of M. arvensis and substantial, though incomplete, population differentiation were identified. It was demonstrated that the population of M. arvensis from the Komi Republic was the most genetically isolated, while the populations from Moscow and Penza provinces were weakly differentiated from each other. The population from the Republic of Belarus (near Grodno) was genetically and phytochemically considerably different from the other studied populations, although morphologically indistinguishable from them. We argue that the differentiation was caused not only by the isolation by distance but also owing to the formation of three different ecotypes adapted to different climatic conditions.

Russian Journal of Genetics, 2016

Using the method of ISSR analysis, the genetic diversity of 18 natural populations of Tulipa gesn... more Using the method of ISSR analysis, the genetic diversity of 18 natural populations of Tulipa gesneriana L. from the north of the Lower Volga region was examined. The ten ISSR primers used in the study provided identification of 102 PCR fragments, of which 50 were polymorphic (49.0%). According to the proportion of polymorphic markers, two population groups were distinguished: (1) the populations in which the proportion of polymorphic markers ranged from 0.35 to 0.41; (2) the populations in which the proportion of polymorphic markers ranged from 0.64 to 0.85. UPGMA clustering analysis provided subdivision of the sample into two large clusters. The unrooted tree constructed using the Neighbor Joining algorithm had similar topology. The first cluster included slightly variable populations and the second cluster included highly variable populations. The AMOVA analysis showed statistically significant differences (FCT = 0.430; p = 0.000) between the two groups. Local populations are considerably genetically differentiated from each other (FST = 0.632) and have almost no links via modern gene flow, as evidenced by the results of the Mantel test (r =–0.118; p = 0.819). It is suggested that the degree of genetic similarities and differences between the populations depends on the time and the species dispersal patterns on these territories.