The Concept of Ontogenesis Polyvariance and Modern Evolutionary Morphology

Notov, A. A.; Жукова, Л.А.

doi:10.1134/s1062359019010072

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…To measure the main morphological parameters of the seedlings, we used binocular microscopes MBS-10 and MSP-2 with micrometric scales. While describing the ontogenic states and peculiarities of ontogenesis, we used the concept of discrete description and polyvariance of ontogenesis (Komarov et al, 2003;Savinykh & Cheryomushkina, 2015;Notov & Zhukova, 2019).…”

Section: Methodsmentioning

confidence: 99%

Reproductive potential of yellow water-lily (Nuphar lutea) in the conditions of lake ecosystems

2020

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Nuphar lutea (L.) Sm. (Nymphaeaceae Salisb.) belongs to the category of highly active cenose-forming plants in water bodies and water flows. The material for study of morphological peculiarities and seed productivity of the fruits of this species was collected mainly in the lake ecosystems of the Central Part of European Russia and Republic of Belarus. In the study we used biomorphological and ontogenetic approaches. Seed productivity was surveyed by direct count of number of seeds in the fruit. By abundance (in descending order), the significant reliable inter-lake differences in a number of morphological parameters of the fruit fall into the following sequence: number of rays of stigma of fruit (in six pairs of lakes) > length of fruit (in four pairs of lakes) > diameter of the stigma of fruit (in three pairs of lakes) > diameter of fruit (in two pairs of lakes) > length of the neck of the fruit (in one pair of lakes). Intra-regional differences in certain morphological parameters of fruits (by number of rays of stigmas) were most notably manifested only in the Belarus lakes which are similar by trophic status. All the differences in the fruits’ morphology could be due to differences in the habitat by the amount of nutrients in water and soil. The amount of seed productivity of the fruits from N. lutea varies broadly. Analysis of this parameter depending on the character of soils in which the plants grew indicated reliable results only in the case of muddy (296 ± 81) and sandy soils (179 ± 13). We determined that distribution of generative diasporas of N. lutea across large distances is related not only to presence of floating ability in the seeds, but also the “multi-step” process of their release: first – mericarps from fruits, and then seeds from mericarps. In the experimental conditions, most seeds directly sunk to the bed (70%) and the rest continued to float on the surface of the water during a month. Low germination of the seeds of the water-lily in the laboratory conditions (4–6%) with use of different means and terms of dry stratification was due to the fact that they have an organic morphophysiological intermediate type of rest. Having such a mechanism causes portioned and prolonged germination, allowing the species to survive in non-favourable conditions and accumulate generative diaspores in the soil. Despite the fact that the initial stages of ontogenesis in the laboratory and natural conditions have no significant differences, we found polyvariance in their tempo of development. First of all, this is related to different dates of transition of the plant from one age state to another. In the case of N. lutea, one should also note the morphological polyvariance of ontogenesis related to change in morphologic characteristics of plants depending on the water level. The obtained results give a more complete picture of the peculiarities of generative reproduction of N. lutea, necessary for understanding the ecosystem role of this plant and its impact on biological processes in water bodies.

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Section: Methodsmentioning

confidence: 99%

Reproductive potential of yellow water-lily (Nuphar lutea) in the conditions of lake ecosystems

2020

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“…The problem of studying the variability of plants at the organism level and the search for signs-markers of ontogenetic states of individuals is important for the ecology of populations [1,2]. On the other hand, when studying the variability of plants living in a built environment, it is necessary to identify signs that are indicators of the quality of the habitat.…”

Section: Introductionmentioning

confidence: 99%

Use of morphometric and phenological indicators of Betula pendula Roth for environmental health assessment

Turmukhametova,

Turmukhametov

2023

E3S Web of Conf.

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The article presents the results of long-term biomonitoring of the quality of the environmental of the city of Yoshkar-Ola (Russia) based on the analysis of morphological and phenological indicators of Betula pendula Roth. The authors studied Betula pendula trees at various stages of ontogenesis in the generative period. The authors also found out the heterogeneity of ontogenetic groups of trees by morphological and phenological characteristics in different ecotopes of the city, differing in the degree of pollution by industrial and transport emissions, using principal component analysis A decrease in the morphometric parameters of the Betula pendula leaf blade and leaf damage by phyllophagous insects do not always indicate a deterioration in the quality of the habitat. Moderate doses of atmospheric toxicants can accelerate the growth of B. pendula leaves. However, in conditions of urban pollution, the stability of B. pendula development is disrupted, which is manifested in an increase in the leaf asymmetry index. There are the most informative indicators of the state of the environment in individuals B. pendula: morphometric – an indicator of fluctuating asymmetry of leaves, phenological – the timing and duration of phenophases. The young generative trees of B. pendula are most sensitive to habitat pollution.

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“…Coenotic populations of plant species are complex systems of the supraorganism level, studying their ontogenetic structure makes it possible to reveal the responses to anthropogenic impacts. In recent years, the concept of polyvariance of ontogeny has been developed, which becomes the basis for studying the diversity of ways of individual development [3]. Active studies of the polyvariance of development in plant populations and the nature of this phenomenon has been started [4], [5].…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that individuals at any age state can exhibit a wide range of variability of the structural organization, ways of reproduction and rates of development within the genetic program of ontogeny. The concept of polyvariance was formed as an approach to the analysis of heterogeneity of populations [3]. In the Arctic region, such studies are still few [5].…”

Section: Introductionmentioning

confidence: 99%

Polyvariance of ontogeny of Castilleja lapponica Gand. under industrial pollution of the Subarctic

Vasilevskaya

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Studies of the cenopopulations of Castilleja lapponica Gand. - the endemic Arctic, North European species were carried out in the Lovozersky Mountains (Murmansk region). Monitoring of the cenopopulations of C. lapponica continued for 2 years under chemical and radiation pollution of the environment (30-60 uR/hr) by the Lovozersky Mining and Processing Plant where the tantalum-niobium ores and rare earth raw materials are mined and processed. Wastes of ore dressing are homogeneous sands, which are stored in the Tailing Dump. The study was held at stationary test sites in the tundra meadows and in the vicinity of the Karnasurt Tailing Dump. The polyvariance of ontogeny in cenopopulations of C. lapponica under the industrial pollution and in the natural environment of the tundra has been revealed. It is shown that under the technogenic stress, Castilleja, which reproduces in tundra meadows mainly vegetatively, switches to seed reproduction. Ontogeny spectra are unstable: in the first year of monitoring, seedlings are dominating, in the second - generative plants. Radiation stimulates the germination of seeds, the intensity of sexual reproduction increases, but most of seedlings are eliminated up to the next year. The high level of dooming of generative shoots and individuals, teratogenesis of inflorescences has been identified. The vitality of individuals decreases, the density of cenopopulations changes. Seed reproduction under conditions of the environment pollution by rare elements and radionuclides can be considered as an adaptation that contributes to the survival of C. lapponica.

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The Concept of Ontogenesis Polyvariance and Modern Evolutionary Morphology

Cited by 10 publications

References 20 publications

Reproductive potential of yellow water-lily (Nuphar lutea) in the conditions of lake ecosystems

Reproductive potential of yellow water-lily (Nuphar lutea) in the conditions of lake ecosystems

Use of morphometric and phenological indicators of Betula pendula Roth for environmental health assessment

Polyvariance of ontogeny of Castilleja lapponica Gand. under industrial pollution of the Subarctic

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