scholarly journals ТЕХНОГЕНЕЗ И СТРУКТУРНО-ФУНКЦИОНАЛЬНЫЕ РЕАКЦИИ ДРЕВЕСНЫХ ВИДОВ: ПОВРЕЖДЕНИЯ, АДАПТАЦИИ, СТРАТЕГИИ. ЧАСТЬ 4. ВЛИЯНИЕ НА ЖИЗНЕННОЕ СОСТОЯНИЕ И ВЫРАБОТКУ АДАПТИВНЫХ СТРАТЕГИЙ ДРЕВОСТОЕВ.

2021 ◽  
Vol 13 (4) ◽  
pp. 11
Author(s):  
Р.В. Уразгильдин ◽  
А.Ю. Кулагин

The present publication is the fourth in the series of four reviews of reports that have been published over the last 20 years to address the responses of arboreal plants at different hierarchical levels of their organization to anthropogenic factors. In the fourth part, modern methodological approaches to assessing the conditions of forests are considered and the most promising of them are distinguished. The conditions of forests under anthropogenic pollution deteriorate in general; however, the degree of deterioration much depends on tree species and pollution type. The resistance of biosystems to anthropogenic factors is based on adaptive responses involving all levels of biological organization, from cytogenetic to ecosystemic. Special attention is paid to adaptive responses related to plant resistance to metals. The development of the theory of the adaptive strategies of plants is traced starting from the Ramensky-Grime concept of phytocenotypes. The industrial pollution is a novel, in the historical perspective, environmental factor for plant. This makes it reasonable to develop further the concepts related to adaptive strategies of plant species with account for their adaptive potential, variability, resistance, and ecological plasticity. An original approach to the discovery and characterization of strategies of adaptation of plants to anthropogenic factors is proposed based on the analysis of current literature and decades of original studies.

2021 ◽  
Vol 13 (3) ◽  
pp. 11
Author(s):  
Р.В. Уразгильдин ◽  
А.Ю. Кулагин

The present publication is the first of four reviews of reports that have been published over the last 20 years to address the responses of arboreal plants at different hierarchical levels of their organization to anthropogenic factors. The publication covers the effects of different kinds of industrial pollution on macro- and micromorphology of broad and acerose leaves. The specific and nonspecific responses of arboreal plants to the same factor or to different factors, including smokes and toxicants, are differentiated. The adaptive responses within a single leaf or needle may be relatively independent from each other despite the integrity of these plant organs. The causes of such diverse reactions, which ensure the adaptive potential of plants, are discussed with account for the multiplicity of biological functions required for maintaining plant tolerance to anthropogenic impacts.


2021 ◽  
Vol 13 (3) ◽  
pp. 1
Author(s):  
Р.В. Уразгильдин ◽  
А.Ю. Кулагин

The present publication is the first of four reviews of reports that have been published over the last 20 years to address the responses of arboreal plants at different hierarchical levels of their organization to anthropogenic factors. The publication covers the effects of different kinds of industrial pollution on macro- and micromorphology of broad and acerose leaves. The specific and nonspecific responses of arboreal plants to the same factor or to different factors, including smokes and toxicants, are differentiated. The adaptive responses within a single leaf or needle may be relatively independent from each other despite the integrity of these plant organs. The causes of such diverse reactions, which ensure the adaptive potential of plants, are discussed with account for the multiplicity of biological functions required for maintaining plant tolerance to anthropogenic impacts.


1997 ◽  
Vol 61 (3) ◽  
pp. 294-304
Author(s):  
H D Luján ◽  
M R Mowatt ◽  
T E Nash

Microbiologists have long been intrigued by the ability of parasitic organisms to adapt to changes in the environment. Since most parasites occupy several niches during their journey between vectors and hosts, they have developed adaptive responses which allow them to survive under adverse conditions. Therefore, the life cycles of protozoan and helminthic parasites are excellent models with which to study numerous mechanisms involved in cell differentiation, such as the regulation of gene expression, signal transduction pathways, and organelle biogenesis. Unfortunately, many of these studies are very difficult because the conditions needed to elicit developmental changes in parasites remain undetermined in most cases. Recently, several interesting findings were reported on the process of differentiation of Giardia lamblia trophozoites into cysts. G. lamblia is a flagellated protozoan that inhabits the upper small intestine of its vertebrate host and is a major cause of enteric disease worldwide. It belongs to the earliest identified lineage among eukaryotes and therefore offers a unique insight into the progression from primitive to more complex eukaryotic cells. The discovery of a specific stimulus that induces trophozoites to differentiate into cysts, the identification and characterization of encystation-specific molecules, the elucidation of novel biochemical pathways, and the development of useful reagents and techniques have made this parasite an excellent model with which to study differentiation in eukaryotic cells. In this review, we summarize the most recent fundings on several aspects of Giardia differentiation and discuss the significance of these findings within the context of current knowledge in the field.


Author(s):  
V. Korchevska ◽  
O. Voytsekhivska

It is analyzed the population dynamics, vitality and age structure of populations of individuals of 4 rare plants of Orshidaceae family – Anacamptis palustris (Jacg.) R.M. Bateman, Dactylorhiza maculate (L.) Soό, Dactulorhiza traunsteineri (Saut. Ex Reichenb.) Soό, Dactylorhiza incarnate (L). Soό in the article. The population age structure monitoring found that the most stable is the population of Anacamptis palustris species (loss of strength 20.5 %, the population is in a mature state of 2012.), the most volatile one is Dactylorhiza maculata (loss of strength 44.6 %, permanent change of age structure). The effects of natural abiotic factors (temperature, rainfall) did not significantly affect to the population structure, while the effects of anthropogenic factors led to population depression. In population of Dactulorhiza traunsteineri and Dactylorhiza maculata it is observed the prevalence of low vitality class individuals', which indicates the presence of population adaptive potential. The primary condition for the preservation of population of Orchidaceae family is the creation of optimal conditions for their growth, the reduction of the anthropogenic load and provision to the studied areas the reservation status.


2019 ◽  
Vol 59 (1) ◽  
pp. 82-92
Author(s):  
A. V. Silina

At the study area of industrial and domestic sewages into Amursky Bay at the coasts of Vladivostok city, three main stages in a development of the scallop Mizuhopecten yessoensis population and community of endo- and epibionts of its shell were revealed for 1981–2016. During the first stage lasting until the beginning of 90th, the scallop growth rates and lifetime had decreased, but scallop mortality and degree of the shell bioerosion performed by endolithic polychaeta Polydora brevipalpa had increased. It was a period of an intensification of anthropogenic pollution of Amursky Bay. Further, at the middle of 90th, at a transitional period, the decline in the scallop growth rates had stopped. It was a period of a reduction of the pollution of the water and bottom sediments related to the decrease of sewages due to degradation of industry. During the second stage lasting until the middle of 2000th, the scallop growth rates had increased, but the degree of bioerosion and abundance of epibionts of the scallop shells had decreased. It was a period of the gradual natural depuration of the Bay. Later, during the third stage, which goes on to present day, the scallop growth rates declined again due to an increase of the water euthrophication resulting in the decline of the water oxygen saturation. This was most pronounced for periodic rises of the water temperature caused by quasi-biennial and 7–8-year periodicities of temperature fluctuations. Poaching became one of the negative anthropogenic factors entailing the substantial decline of the scallop population density.


2020 ◽  
pp. 26-34
Author(s):  
Nataliia Smochko

The purpose of this research work is to analyze modern theoretical and methodological approaches to the study of territorial systems of monodevelopment in the theory of social geography. Method. General scientific methods, including analysis, scientific synthesis, analytical method, methods of comparison and generalization were used in the study. Scientific novelty. The article reveals traditional and innovative approaches to identifying and defining the territorial system of mono-development in the geographical space. In substantiating the application of approaches, we used the work of scientists and geographers, who took them into account in the study of complex systems. It has been determined that the leading and traditional approaches in socio-geographical research are historical-geographical (retrospective) and territorial (geospatial), which should be combined with genetic. According to which all geographical phenomena have been considered as processes that have their genesis, dynamics, differences, patterns spatial distribution. To study the processes of system formation, a comprehensive approach is important. It provides a comprehensive analysis of the development of the main factors in the formation of modern socio-economic processes in the regions. The system approach allows to consider functioning and development of the territorial monosystem and its basic types as systems of the territorial organization of a society at various hierarchical levels, to open their integrity and the mechanisms providing effective management of such monodevelopment. At the same time, it has been found that not all the outlined approaches of complex systems can be used to study monosystems in the form in which they were used previously. This is because in the study of systems in retrospect, the application of approaches was focused on the analysis of the structure of the studied objects and the variety of processes that took place between the elements of the studied systems. In the study of monosystems, the researcher should be interested in their development to bifurcation moments and the conditions for further preservation of monosystems. This means that traditional approaches, such as historical-geographical (retrospective) and territorial (geospatial) should be modified to adapt to these tasks. It is important to use innovative approaches: cluster (formation of so-called network structures), behaviorist (explanation of the territorial identity of the monosystem), participatory (strategic planning of the territorial development of the monosystem). Only by combining a variety of approaches will it be possible to obtain a synergistic effect and form a synergistic approach that will provide additional benefits in the study of monosystems and the processes of their functioning. Practical meaning. The results of this study contribute to a deeper socio-geographical understanding of the processes of monodevelopment, their genesis, features of their course and provide an opportunity to model the long-term development of territorial social systems, to achieve expected results due to long-term transformation. They can be used for further study of monosystems of different hierarchical levels, as well as for the development of practical recommendations and programs for the development of individual monoterritories.


2017 ◽  
Vol 10 (3) ◽  
pp. 121
Author(s):  
Gennady A. Borisov ◽  
Vladimir G. Krikun ◽  
Victoria V. Kutko ◽  
Vitaly V. Penskoy ◽  
Svetlana V. Sherstobitova

In this article features of political regime development in the Russian state of the Moscow era (the end of the XV-XVII centuries) are considered in the general context of the European early-modern states of the XVI-XVII centuries formation and evolution. Use of new methodological approaches and deeper and at the same time original approach to the analysis of both narrative, and assembly materials allow to conclude that, despite unusual, at first sight, features of development of the Russian state during the considered period (those natural and geographical conditions caused first of all by character it developed in), Russia can be put in one row with such early-modern states as France, Spain or the Ottoman Empire. For all of them who are not possessing the developed officialdom and so developed fiscal institutes and power tools (represented by regular army, police and so forth), the aspiration to find a certain balance of interests between raison d’État (understanding as it first of all interest dynastic) and bien public (that it is first of all interest of the most active and influential part of society, "the political nation" in the political plan) as it guaranteed the power necessary legitimacy, obedience and support from society as indispensable conditions of more or less effective functioning of power institutes is inherent.


2019 ◽  
Vol 136 ◽  
pp. 04058
Author(s):  
Longbin Zhu ◽  
Ying Huang ◽  
Wenyu Chen

Urban communities are important sector for energy saving and emission reduction. Characterization of household carbon emission is critical to the planning of low-carbon communities. Taking data from five communities in Nanjing, China as the empirical research object, this study explores the relationship between household consumer activities and direct carbon emission of household energy consumption based on the Consumer Lifestyle Approach. Using regression analysis, we identify the characteristics of the emission and the four most significant impact factors. Adaptive low carbon strategies are further suggested as how to influence consumer activities by planning of urban communities.


2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Ruth Flatscher ◽  
Božo Frajman ◽  
Peter Schönswetter ◽  
Ovidiu Paun

The dualism of genetic predisposition and environmental influences, their interactions, and respective roles in shaping the phenotype have been a hot topic in biological sciences for more than two centuries. Heritable epigenetic variation mediates between relatively slowly accumulating mutations in the DNA sequence and ephemeral adaptive responses to stress, thereby providing mechanisms for achieving stable, but potentially rapidly evolving phenotypic diversity as a response to environmental stimuli. This suggests that heritable epigenetic signals can play an important role in evolutionary processes, but so far this hypothesis has not been rigorously tested. A promising new area of research focuses on the interaction between the different molecular levels that produce phenotypic variation in wild, closely-related taxa that lack genome-wide genetic differentiation. By pinpointing specific adaptive traits and investigating the mechanisms responsible for phenotypic differentiation, such study systems could allow profound insights into the role of epigenetics in the evolution and stabilization of phenotypic discontinuities, and could add to our understanding of adaptive strategies to diverse environmental conditions and their dynamics.


2016 ◽  
Vol 7 (3) ◽  
pp. 197-204 ◽  
Author(s):  
Paola Cavaliere ◽  
Françoise Norel

AbstractThe bacterial RNA polymerase (RNAP) holoenzyme is a multisubunit core enzyme associated with a σ factor that is required for promoter-specific transcription initiation. Besides a primary σ responsible for most of the gene expression during active growth, bacteria contain alternative σ factors that control adaptive responses. A recurring strategy in the control of σ factor activity is their sequestration by anti-sigma factors that occlude the RNAP binding determinants, reducing their activity. In contrast, the unconventional transcription factor Crl binds specifically to the alternative σ factor σS/RpoS, and favors its association with the core RNAP, thereby increasing its activity. σS is the master regulator of the general stress response that protects many Gram-negative bacteria from several harmful environmental conditions. It is also required for biofilm formation and virulence of Salmonella enterica serovar Typhimurium. In this report, we discuss current knowledge on the regulation and function of Crl in Salmonella and Escherichia coli, two bacterial species in which Crl has been studied. We review recent advances in the structural characterization of the Crl-σS interaction that have led to a better understanding of this unusual mechanism of σ regulation.


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