Influence of metabolic stress on the inheritance of cell determination in the moss,

Lobachevska, О.V.; Kyjak, Natalia; Dovgalyuk, A.; Kit, N.A.; Klyuchivska, Olga; Stoika, Rostyslav; Ripetsky, R.; Cove, David J.

doi:10.1016/j.cellbi.2005.02.001

Cited by 9 publications

(8 citation statements)

References 8 publications

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“…Studies of morphological and metabolic processes at the different stages of moss ontogenesis under gravistimulation and abiotic stress complement the knowledge about the protective adaptive mechanisms of plants. A fairly simple structural and functional organization of mosses is a convenient model system for studying the nature of plant stress tolerance (Lobachevska et al, 2005(Lobachevska et al, , 2019cLobachevska, 2013;Tuba et al, 2011;Glime, 2006;Müller et al, 2016). It has been established that a long-term protonema stage in W. tortilis, which persists throughout the life cycle, is characterized by specific differentiation of morphologically different chloronema and caulonema cells and the formation of lateral branches of the chloronema type (dendrites).…”

Section: Discussionmentioning

confidence: 99%

The role of gravimorphoses in moss adaptation to extreme environment

Lobachevska¹,

Kyyak²,

Kordyum³

et al. 2021

Ukr. Bot. J.

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Gravisensitivity of mosses at different stages of their ontogenesis has an adaptive value and contributes to the functional activity of the gametophyte and its stability under extreme conditions in microhabitats. The aim of our research was to determine the participation of gravimorphoses in the adaptive plasticity of mosses depending on thermal conditions of their habitats and UV radiation effect. The objects of the study were sterile cultures of the following moss protonemata: Weissia tortilis, collected in different thermal conditions of Zaporizhzhya and Lviv regions (Ukraine), Bryum caespiticium from Lviv Region (Ukraine), as well as B. caespiticium and Polytrichum arcticum collected in Antarctica (Galindez Island). In all moss cultures, the gravisensitivity of protonemata, the morphological structure and morphogenesis of stolons were analysed. The protonemata of W. tortilis from two populations in Ukraine and of B. caespiticium from Antarctica and Ukraine, growing under conditions of different UV levels, were compared in terms of their sensitivity to UV radiation. Gravity-dependent morphoses of terrestrial dendrites of W. tortilis under arid conditions, branching of apical cells of gravitropic stolons of Antarctic mosses P. arcticum and B. caespiticium as well as the rapid development of shoots on them demonstrate participation of gravimorphogenesis in adaptation of mosses to stressful environmental conditions. Gravisensitivity and ability to form buds at the apex of a gravitropic stolon are considered an important adaptive morphogenetic process. It has been found that plants of W. tortilis from Zaporizhzhya Region were more resistant to UV irradiation than those from Lviv Region. Antarctic moss after UV irradiation showed significantly higher antioxidants activity and contained larger amount of phenolic compounds and flavonoids.

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Section: Discussionmentioning

confidence: 99%

The role of gravimorphoses in moss adaptation to extreme environment

Lobachevska¹,

Kyyak²,

Kordyum³

et al. 2021

Ukr. Bot. J.

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“…They absorb nutritious substances from precipitation and atmospheric air, and keep them in the undecomposed part of the moss turfs (Turetsky et al, 2012;Kyyak & Baik, 2016). This can be explained by the growing conditions of mosses (high level of the humidity, high actual acidity, low temperature) and physical and chemical peculiarities of the moss cells (high cation exchange capacity and high concentrations of phenolic compounds and lipids in the cell walls) (Lobachevska et al, 2005;Seedre & Chen, 2010;Lobachevska, 2014;Kyyak & Khorkavtsiv, 2016). In addition to the storage of mineral nutrients, bryophytes are able to accumulate carbon.…”

Section: Discussionmentioning

confidence: 99%

Role of the bryophytes in substrate revitalization on a post-technogenic salinized territory

et al. 2020

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This work aims to investigate the role of the bryophyte cover in substrate revitalization on a post-technogenic salinized territory. The influence of the moss cover on the organic carbon content, actual acidity, redox potential, and the content of the main ecological and trophic groups of microorganisms in the substrate of the tailings storage of the Stebnyk Mining and Chemical Enterprise "Polymineral" was investigated. Bryophytes significantly affect the tailings storage saline substrates. They colonize areas with a very strong and strong degree of salinity, which are unsuitable for other plants. It was indicated that pioneer moss species promote the accumulation of organic matter in saline substrates of the tailings storage. Under moss turfs, the amount of organic carbon increased 2.2–5.0 times, compared with its content in the uncovered substrate. The high variability of the organic matter content is determined by the species characteristics of mosses, primarily their life form. The dense-turf species Didymodon rigidulus and Pthychostomum pseudotriquetrum var. bimum accumulated the most organic matter. The thickness of the litter under the moss turf of these species was much greater than in Barbula unguiculata and Funaria hygrometrica, which form loose turf. We assessed the specificity of the accumulation of organic carbon in the turfs of the studied mosses. It founded that most organic matter accumulated in the dead parts of the moss turf. In the green parts of the shoots of these moss species the amount of organic carbon was 3–4 times less, which indicates a relationship between litter capacity and content of carbon in the substrate under moss turfs. We investigated the influence of mosses on the actual acidity of the tailings storage substrate. Moss turfs promote the increase of acidity of the aqueous solution of the tailings substrate by 0.2–0.5 units. The tailings storage substrates are characterized by a reduction regime. The redox potential of the substrate under moss cover significantly depended on the species characteristics of mosses. Under the moss cover, the redox potential increased by 1.2–1.4 times, compared with the index for the substrate without moss cover. We studied the influence of moss cover on microbial biomass and the quantity of some ecological-trophic groups of microorganisms in the substrates of the tailings storage. The amount of microbial biomass under moss turfs increased depending on the degree of the substrate salinization and the species characteristics of the mosses. In areas with a very high degree of salinization under the moss turfs of Didymodon rigidulus and Funaria hygrometrica, the microbial biomass index increased almost two times, compared with the uncovered substrate. We found a significant increase in the quantity of the main ecological and trophic groups of microorganisms (saprophytes, cellulose-destroying bacteria, oligonitrophils and nitrogen fixers) in the substrate under the moss cover. Thus, pioneer moss species have a complex effect on the saline substrate of tailings storage. They accumulate organic matter, increase the acidity of the upper layer, improve the redox regime of the substrate and promote the development of soil microbiota.

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“…They attach to the polar terminal groups of membrane phospholipids and thus stabilize the membrane structure of moss cells under stressful conditions. In addition, high concentrations of sugars in the cell provide vitrification of the cytoplasm and membranes, which gives the cell structures stability and minimizes protein denaturation (Lobachevska et al, 2005;Wang et al, 2008;Bates et al, 2009). Carbohydrates also intercept reactive oxygen species and inhibit the processes of free radical oxidation of biological molecules during the development of oxidative stress induced by salinity.…”

Section: Discussionmentioning

confidence: 99%

“…After cessation of production, the demutation of plant cover at these territories is mostly spontaneous. Due to their high tolerance to the effect of ecological change, bryophytes play an important role in succession processes on devastated territories where other plants cannot initially grow (Lobachevska et al, 2005;Glime, 2006;Maestre et al, 2015). By inhabiting such disturbed territories, pioneer moss turfs form a new succession with changes in humidity (Shcherbachenko et al, 2015;Rabyk et al, 2017), mineral (Vilmundardóttir et al, 2018) and organic status of the substrate (Karpinets et al, 2016;Kyyak & Baik, 2016;Karpinets et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Ecological and physiological peculiarities of bryophytes on a post-technogenic salinized territory

2019

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Taxonomic, biomorphological and ecological structures of bryophytes, their reproductive strategy and the main mechanisms of tolerance in the conditions of salinization were investigated. Bryophytes are the pioneers that have colonized the territory of a tailing storage that holds liquid waste from potassium-magnesium concentrate production of the Mining and Chemical Enterprise "Polymineral". Due to excess salts, the soil solution in the shore area of the tailing pond acquires high osmotic pressure. Three experimental plots which differed significantly in the level of the substrate salinity were laid at the distance of 3, 6 and 9 m from the reservoir for experimental studies. Water extracts of the substrates from the test sites showed the highest concentrations for sulfates – 10.4–64.6 mg Eq/100 g of soil and chlorides – 7.6–43.3 mg Eq/100 g of soil. It was established that the investigated areas of the tailing storage territory differed in the biochemical activity of the substrate, which was evaluated by its redox potential. On the areas of the uncovered substrate it was the lowest – 230 mV, which indicates anaerobiosis in conditions of very high salinization and moisture. Higher ROP values were determined at the sites of bryophyte cover distribution – 295–330 mV. The aim of the study was to determine the features of taxonomic, biomorphological and ecological structures of bryophytes, their reproductive strategy and to establish the main mechanisms of adaptation to the conditions of salinization on the tailing storage territory. 24 species and 3 varieties of bryophytes, belonging to 12 families and 16 genera were found on the shore of the tailing storage pond. The results of biomorphological and ecological analysis of bryophytes indicate the uneven conditions of the habitats and their considerable ecological plasticity. Among the bryophytes, mesophytes, xeromesophytes and meso-eutrophs, eutrophs with a life-form of low dense and loose turf dominated. In salinization conditions, dioicous acrocarpous mosses prevailed, the fertile turf of which, depending on the influence of abiotic factors, differed significantly in the number of sexual shoots, their ratio and productivity. Bulbils were found only on the tips of Bryum argenteum shoots. Along with Salicornia europaea L., a euhalophyte, the leading role in the initial stage of overgrowth of the tailing storage area most often belonged to Didymodon rigidulus, Bryum argenteum, Funaria hygrometrica and Barbula unguiculata. The process of formation of bryophyte cover occurred along a gradient of decrease in salt concentration at the experimental sites. Adaptation of bryophytes to substrate salinity is due to a change in metabolic processes, which is manifested in an increase of the total content of carbohydrates and an increase of the cation exchange capacity of moss cell walls, which is the primary barrier that reduces the toxic effect of ions under salt stress.

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Influence of metabolic stress on the inheritance of cell determination in the moss,

Cited by 9 publications

References 8 publications

The role of gravimorphoses in moss adaptation to extreme environment

The role of gravimorphoses in moss adaptation to extreme environment

Role of the bryophytes in substrate revitalization on a post-technogenic salinized territory

Ecological and physiological peculiarities of bryophytes on a post-technogenic salinized territory

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