Margarita V. Remizowa

Lomonosov Moscow State University | MSU · Department of Higher Plants

The Acorus calamus group, or sweet flag, includes important medicinal plants and is classified into three species: A. americanus (diploid), A. verus (tetraploid), and A. calamus (sterile triploid of hybrid origin). Members of the group are famous as components of traditional Indian medicine, and early researchers suggested the origin of the sweet f...

The genus Acer belongs to the family Sapindaceae, whose representatives are characterized by a pentamerous perianth but typically possess only eight stamens. Such an androecium is believed to have evolved through the loss of two stamens. However, there is still no consensus on the origin of eight-staminate androecium including the positions of the...

Commonly considered bispecific, Acorus is one of the most phylogenetically isolated angiosperm genera that forms the order Acorales sister to the rest of the monocots. The Acorus calamus group is widely distributed in the Holarctic regions of Eurasia and America and has strong medicinal and other practical uses since prehistoric times. Earlier stud...

КОУЛ ТКГ, РЕМИЗОВА МВ (2024) Филогения ARACEAE - Основные признаки и роды Ароидных © КОУЛ, РЕМИЗОВА 2024 (CC-BY), Russian version of: COLE TCH (2024) ARACEAE Phylogeny Poster (Essential Aroids) • Гипотетическое дерево основано на молекулярно-филогенетических данных из работ Haigh et al. (2023) и Zhao et al. (2023) • 43 из примерно 140 выделяемых си...

The phenomenon of heterochrony, or shifts in the relative timing of ontogenetic events, is important for understanding many aspects of plant evolution, including applied issues such as crop yield. In this paper, we review heterochronic shifts in the evolution of an important floral organ, the carpel. The carpels, being ovule-bearing organs, facilit...

Acer negundo L. is a wind-pollinated, dioecious tree that occasionally produces flowers with rudiments of the opposite sex. Both the male (staminate) and female (pistillate) flowers possess only two whorls: sepals and stamens or carpels, the arrangement of which is disputed. Here we present data on inflorescence and floral development, pollen ferti...

COLE, SOKOLOFF, REMIZOWA, LEI, YU (2023) ALISMATALES 泽泻目系统发育关系与性状 © Cole, Sokoloff, Remizowa, Lei, Yu (CC-BY) 2023, Chinese version of: COLE, SOKOLOFF, REMIZOWA (2020) Alismatales Phylogeny Poster (AlisPP) • 包含了14个科，约160属，4800个物种 • 拓扑结构树基于 Ross TG等人的研究（2015） • 枝长无意义，不代表实际的时间尺度 • 属、种数（灰色）为估计值 • 参考文献: Kubitzki (1998) FGVP IV; Ross et al. (2015), Soko...

The basal monocot genus Acorus comprises essential oil-producing plants widely used in traditional medicine in various countries, including India. Acorus calamus sensu lato is a polyploid complex where the essential oil composition, to some extent, depends on the ploidy level. The literature recognizes diploids (in temperate Asia and North America)...

Pendent sessile flowers of Chamaelirium japonicum (Willd.) N. Tanaka appear zygomorpic, but they do not possess a bilateral symmetry. The flowers are subtended by a vestigial bract and lack a bracteole. The perianth consists of two small tepals on the abaxial side of the flower and four large tepals, none of which is median. Because the short tepal...

Heinrich Wilhelm Schott (1794-1865) was one of the pioneering researchers in the taxonomy of the species-rich monocot family Araceae. He described numerous new plant species in various genera, including Acorus, which is currently segregated as a monogeneric family and order occupying a position sister to the rest of the monocots. While describing h...

COLE TCH, BACHELIER JB, SOKOLOFF DD, REMIZOWA MV (2020) Phylogénie des ALISMATALES © Cole, Bachelier, Sokoloff, Remizowa 2020 (CC-BY) • 14 familles, 166 genres, 4800+ espèces • arbre phylogénétique d'après Ross TG et al. (2015) • longueurs des branches délibérées, n'exprimant pas l'échelle de temps réelle • nombres de genres et d'espèces sont appro...

COLE TCH, SOKOLOFF DD, REMIZOWA MV (2019) Phylogenie der ALISMATALES © Cole, Sokoloff, Remizowa 2019 (CC-BY) • 14 Familien, 166 Gattungen, 4800+ Arten • Stammbaum basierend auf Ross TG et al. (2015) • Astlängen willkürlich, ohne Zeitbezug • Gattungs- und Artenzahlen sind ungefähr • Quellen: Kubitzki (1998) FGVP IV; Ross et al. (2015), Sokoloff et a...

For Ledebouria socialis, a superior ovary with interlocular septal nectaries that are confined to both ascidiate and plicate zones of the carpel is typical. It is impossible to describe the gynoecium zonation consistently, since the existing terminology does not allow us to display all its peculiarities. A part of the nectaries located in the gynop...

The basalmost monocot genus Acorus is well-known for its use in traditional oriental medicine. It comprises the groups of A. calamus and A. gramineus. A recent study recognized three species in the latter group, A. gramineus, A. macrospadiceus, and A. tatarinowii. The material currently known as A. tatarinowii has been extensively studied as a sour...

Introduction Understanding the complex inflorescence architecture and developmental morphology of common buckwheat (Fagopyrum esculentum) is crucial for crop yield. However, most published descriptions of early flower and inflorescence development in Polygonaceae are based on light microscopy and often documented by line drawings. In Fagopyrum and...

Ceratophyllum is an ancient and phylogenetically isolated angiosperm lineage. Comparisons between Ceratophyllum and other angiosperms are hampered by uncertainty in inferring organ homologies in this genus of specialized aquatics. Interpretation of shoot morphology is especially problematic in Ceratophyllum. Each node has several leaf-like appendag...

A reassessment of taxonomy and geographical distribution of a widespread Asian mycoheterotrophic species Petrosavia sakuraii is presented. Petrosavia amamiensis recently described from the Japanese Ryukyu Islands is demonstrated to fit closely the morphological diversity of P. sakuraii. Data from geography, molecular phylogenetics and reproductive...

The grass family (Poaceae) includes cereal crops that provide a key food source for the human population. The food industry uses the starch deposited in the cereal grain, which develops directly from the gynoecium. Morphological interpretation of the grass gynoecium remains controversial. A bistigmatic grass gynoecium has two sterile carpels, each...

Molecular phylogenetic analyses have revealed a superclade of mesangiosperms with five extant lineages: monocots, eudicots, magnoliids, Ceratophyllum and Chloranthaceae. Both Ceratophyllum and Chloranthaceae are ancient lineages with a long fossil record; their precise placement within mesangiosperms is uncertain. Morphological studies have suggest...

Species of the genus Burmannia possess distinctive and highly elaborated flowers with prominent floral tubes that often bear large longitudinal wings. Complicated floral structure of Burmannia hampers understanding its floral evolutionary morphology and biology of the genus. In addition, information on structural features believed to be taxonomical...

COLE, SOKOLOFF, REMIZOWA, TURDIBOEV (2022) ALISMATALES – O’zaro Munosabatlar va Xususiyatlar, Uzbek version of: COLE, SOKOLOFF, REMIZOWA (2019) ALISMATALES – Relationships and Features • 14 oilalar, ~160 turkumlar, taxminan 4800 turlar • daraxt topologiyasi Ross et al. (2015) asosida • shoxlar uzunligi ataylab qilingan haqiqiy vaqt o’lchovini angla...

The family Rapateaceae represents an early-divergent lineage of Poales with biotically pollinated showy flowers. We investigate developmental morphology and anatomy in all three subfamilies and five tribes of Rapateaceae to distinguish between contrasting hypotheses on spikelet morphology and to address questions on the presence of nectaries and gy...

Naturally occurring mutants whose phenotype recapitulates the changes that distinguish closely related species are of special interest from the evolutionary point of view. They can give a key about the genetic control of the changes that led to speciation. In this study, we described lepidium-like (lel), a naturally occurring variety of an allotetr...

COLE, SOKOLOFF, REMIZOWA, MURSIDAWATI (2021) ALISMATALES – Kekerabatan dan Ciri utama • 14 suku, ~160 marga, tidak kurang dari 4800 jenis • pohon topologi berdasarkan pada Ross TG et al. (2015) • panjang cabang dibuat sedemikian, dan tidak mewakili skala waktu sebenarnya • jumlah marga/jenis (tercetak kelabu) mendekati jumlah perkiraan • Pustaka: K...

COLE TCH, SOKOLOFF DD, REMIZOWA MV, HAMDY RS, EL HADIDY AH (۲۰۲۱) ALISMATALES ‫رتبة المزماريات - العلاقات والميزات Arabic version of: Cole TCH, Sokoloff DD, Remizowa MV (2021) Alismatales Phylogeny Poster - relationships among the 14 families and their major characteristics

Use of ontologies is a major trend of modern comparative, evolutionary and developmental biology (Dahdul et al., 2012; Mungall et al., 2012; Cooper et al., 2018; Walls et al., 2019). An ontology includes a set of standardized terms (each with a numerical code) describing features of structure and development as well as logical relationships between...

Thismia is characterized by an exceptionally complicated floral morphology that is currently not understood properly. In the taxonomic literature, descriptive rather than morphological terms are often applied to parts of the flower in Thismia, relating to the general appearance of the floral organs instead of their precise homologies. Precise under...

Finding morphological differences between cytotypes that are stable throughout their geographical range is important for understanding evolution of polyploid complexes. The ancient monocot lineage Acorus includes two groups, of which A. calamus s.l., an important medicinal plant, is a polyploid complex with a centre of diversity in Asia. European p...

Eriocaulaceae (Poales) differ from potentially related Xyridaceae in pattern of floral organ arrangement relative to subtending bract (with median sepal adaxial). Some Eriocaulaceae possess reduced and non-trimerous perianth, but developmental data are insufficient. We conducted a SEM investigation of flower development in three species of Eriocaul...

The monocot family Triuridaceae is a morphological misfit with respect to several traits of floral morphology, including the uniformly apocarpous polymerous gynoecium and the famous inside-out flowers of Lacandonia. Although Triuridaceae are crucially important for understanding the floral evolution of Pandanales and angiosperms in general, signifi...

We review the diversity and development of archegonia, the female reproductive organs of land-plant gametophytes. The archegonium is a uniquely land-plant structure, and studies of its evolution benefit from use of a comparative approach in a phylogenetic context. Archegonia of most land plants share a common developmental motif, here termed a T-sh...

COLE, SOKOLOFF, REMIZOWA, CARLSEN, ORTIZ (2020) ALISMATALES – Relaciones y características • 14 familias, ~160 géneros, aprox. 4800 especies • topología del árbol basada en Ross TG et al. (2015) • las longitudes de las ramas son deliberadas, no expresan la escala de tiempo real • los números de géneros/especies (en gris) son aproximados Referencias...

European species of Nuphar are amongthe most accessible members of the basal angiosperm grade, but detailed studies using scanning electron microscopy are lacking. We provide such data and discuss them in the evolutionary context. Dorsiventral monopodial rhizomes of Nuphar bear foliage leaves and non-axillary reproductive units (RUs) arranged in a...

COLE, SOKOLOFF, REMIZOWA, CAMELO, COELHO (2020) ALISMATALES – Relações e Características, Portuguese version of: COLE TCH, SOKOLOFF DD, REMIZOWA MV (2019) ALISMATALES – Relationships and Features • 14 famílias, 166 gêneros, cerca 4800 espécies • árvores de topologia baseado em Ross TG et al. (2015) • comprimento dos ramos deliberados, não expressan...

COLE, SOKOLOFF, REMIZOWA, KHOA (2020) BỘ TRẠCH TẢ – các mối liên hệ và đặc điểm. Vietnamese version of: COLE, SOKOLOFF, REMIZOWA (2019) ALISMATALES: Relationships and Features • 14 họ, 166 chi, khoảng 4800 loài • Hình thái cây phát sinh loài dựa trên nghiên cứu của Ross TG et al. (2015) • Chiều dài của nhánh phân loài được tính toán và không thể hi...

КОУЛ ТКГ, СОКОЛОВ ДД, РЕМІЗОВА МВ, ШИЯН НМ (2019) ALISMATALES (ЧАСТУХОЦВІТІ) – систематика та ознаки, Ukrainian version: COLE TCH, SOKOLOFF DD, REMIZOWA MV (2019) ALISMATALES – Relationships and Features • 14 родин, 166 родів, бл. 4800 видів • топологічна схема філогенетичного дерева за Ross TG et al. (2015) • довжина гілок довільна і не відображає...

КОУЛ, СОКОЛОВ, РЕМИЗОВА (2019) ALISMATALES (ЧАСТУХОЦВЕТНЫЕ) родственные отношения и основные признаки • 14 семейств, 166 родов, около 4800 видов • топология дерева по Ross TG et al. (2015) • длина ветвей произвольная, не отражает реальный уровень дивергенции таксонов • числа родов/видов (даны серым) приблизительные. Список литературы: Kubitzki (199...

COLE, SOKOLOFF, REMIZOWA (2019) ALISMATALES – Relationships and Features • an educational A4-size handout • phylogeny and characters of the member families of the order • 14 families, 166 genera, ca. 4800 spp. • tree topology based on Ross TG et al. (2015)

The flora of the southwestern Australian biodiversity hotspot is rich in endemic species, many of which remain to be discovered or properly described; estimates of species diversity and levels of endemism should take into account the possible occurrence of cryptic species. Here we explore taxonomic diversity in a Western Australian lineage belongin...

Fusion between floral organs or their parts is believed to have played key roles in the origin and subsequent diversification of angiosperms. Two types of fusion can be recognized: postgenital and congenital. Postgenital fusion is readily observable during flower development: primary morphological surfaces of contacting structures meet and join dur...

The late Eocene ambers provide plethora of animal and plant fossils including well-preserved angiosperm flowers from the Baltic amber. The Rovno amber from NW Ukraine resembles in many aspects the Baltic amber; however, only fossilized animals and some bryophytes have yet been studied from the Rovno amber. We provide the first detailed description...

The presence of a gynoecium composed of carpels is a key feature of angiosperms. The carpel is often regarded as a homologue of the gymnosperm megasporophyll (that is, an ovule-bearing leaf), but higher complexity of the morphological nature of carpel cannot be ruled out. Angiosperm carpels can fuse to form a syncarpous gynoecium. A syncarpous gyno...

During recent decades, Althenia with two species in Eurasia and Africa was accepted as one of four genera of submerged aquatics comprising the family Zannichelliaceae. Molecular phylogenetic data confirmed monophyly of Zannichelliaceae in its traditional circumscription but placed the clade together with Potamogeton and its segregate genera, so tha...

The presence of a gynoecium composed by carpels is a key feature of angiosperms. The carpel is often viewed as homologous to megasporophyll of gymnosperms (i.e., a leaf bearing ovules), but it is possible that its morphological nature is more complex. Carpels of angiosperms can unite to form a syncarpous gynoecium. Most syncarpous gynoecia possess...

The family Petrosaviaceae is represented in Vietnam by two species, viz. Petrosavia sakuraii restricted to the northern part of the country and P. stellaris distributed in its southern part. The latter species is shown to possess a wide range of distribution in Vietnam, though it was previously believed to be an exclusively Malesian species. The in...

Collateral bundles with external position of the phloem characterize the stem vasculature of most seed plants. An earlier study highlighted the occurrence of inverted peripheral bundles in the leafless inflorescence peduncle of the rare Australian aquatic Maundia triglochinoides. This unusual feature and other morphological and molecular data suppo...

Scheuchzeria palustris, the only member of Scheuchzeriaceae, is unique among Alismatales in several characters, including flower-subtending bracts with conspicuous laminas and pollen dispersed in permanent dyads. Earlier studies revealed unidirectional flower development in some monocots with massive flower-subtending bracts, but not in Scheuchzeri...

In most seed plants, cotyledons formed within the seed act as haustorial organs, as well as playing a key role in releasing the shoot apex from the seed coat on germination. Emergence of the shoot apex often results from asymmetric intercalary growth of the cotyledon bases. This process avoids the principal spatial constraint on germination in seed...

Female flower and fruit anatomy, including vasculature, are studied for the first time in Tetroncium (Juncaginaceae: Alismatales). Other members of Juncaginaceae (and the relatively close Maundiaceae) possess a peculiar type of gynoecium with pronounced carpel fusion via the floral centre. Their carpels are supplied by individual vascular traces an...

PREMISE OF THE STUDY: The small primarily Australian commelinid monocot family Centrolepidaceae displays remarkably high structural diversity that has been hitherto relatively poorly explored. Data on Centrolepidaceae are important for comparison with other Poales, including grasses and sedges. METHODS: We examined vegetative and reproductive morp...

Most molecular evidence points to a root of flowering-plant phylogeny that divides the angiosperm crown group into Amborella vs. all remaining species. However, a subset of analyses have persistently recovered alternative arrangements, typically connecting the root node between Amborella plus water lilies, vs. all other angiosperms. These results m...

Background The aquatic flowering-plant family Hydatellaceae has a classic Gondwanan distribution, as it is found in Australia, India and New Zealand. To shed light on the biogeographic history of this apparently ancient branch of angiosperm phylogeny, we dated the family in the context of other seed-plant divergences, and evaluated its biogeography...

The monogeneric early-divergent angiosperm family Hydatellaceae (Trithuria) was formerly placed in the monocots and shows several features that are at least superficially monocot-like. Seedlings of Hydatellaceae are unusually diverse and have been interpreted as either dicotylar or monocotylar. We provide the first detailed developmental descriptio...

According to recent molecular phylogenetic data, the rare Australian endemic Maundia triglochinoides does not form a clade with taxa traditionally classified as members of Juncaginaceae. Therefore, views on the morphological evolution and taxonomy of Alismatales require re-assessment. As the morphology of Maundia is poorly known and some key featur...

The Arabidopsis thaliana 4/1 (At-4/1) protein has a highly α-helical structure with potential to interact both with itself and other protein ligands, including the movement proteins of some plant viruses; the Nicotiana tabacum ortholog (Nt-4/1) has similar structure. Here we describe localization of GUS expression in transgenic N. tabacum seedlings...

Enclosure of the ovules within the gynoecium (angiospermy) is a key innovation of flowering plants (Endress, 1997, 2001a; Endress and Igersheim, 2000). Thus, inferring subsequent morphological transformations of the gynoecium in various lineages is important in understanding floral diversification. Traditionally, a gynoecium composed of free carpel...

Racemose inflorescences (spikes, racemes and spadices) with flower-subtending bracts either absent or superficially inconspicuous are common among early-divergent monocots classified in the orders Alismatales and Acorales. This bractless condition contrasts with some other monocot orders such as Liliales, Petrosaviales and Dioscoreales, in which fl...

Unlabelled: • Premise of the study: A bipolar embryo with cotyledons is a characteristic feature that appeared early in the evolution of seed plants. Cotyledon number is an important character in angiosperm classification. We explore the links between functional aspects of seed germination and the number and location of the cotyledons, using as...

We provide the first detailed description of specialized anatomical mechanisms of fruit dehiscence in two sections of Trithuria (Hydatellaceae), a basal angiosperm lineage with a markedly ascidiate carpel. The dehiscent fruits of Hydatellaceae are unique among angiosperms. Earlier studies suggested the follicle as a primitive type of dehiscent angi...

Background Understanding and modelling early events of floral meristem patterning and floral development requires consideration of positional information regarding the organs surrounding the floral meristem, such as the flower-subtending bracts (FSBs) and floral prophylls (bracteoles). In common with models of regulation of floral patterning, the s...

Unlabelled: • Premise of the study: The predominantly aquatic order Alismatales displays a highly variable flower groundplan associated with a diverse range of developmental patterns. We present the first detailed description of flower anatomy and development in Posidonia, the sole genus of the seagrass family Posidoniaceae. Existing accounts pr...

Floral morphology, anatomy and development are examined in Xyris grandis (Xyridaceae: Poales), with an emphasis on petal and sepal organogenesis and vasculature. Xyris is one of relatively few monocots in which the perianth is differentiated into two distinct whorls (here termed a double perianth). Xyris also possesses highly unusual perianth vascu...

Staminate inflorescences from Cenomanian-Turonian deposits of the Sarbay locality of western Kazakhstan are described as Krassilovianthus gen. nov. The new genus is characterized by the unique structure of the flower, which is unknown in similar platanoid heads. Flowers of Krassilovianthus gen. nov. possess a perianth that is considerably longer th...