Analysis of the Potential Range of Mountain Pine-Broadleaf Ecotone Forests and Its Changes under Moderate and Strong Climate Change in the 21st Century.

Climatic changes have a significant impact on the composition and distribution of forests, especially on ecotone ones. In the Southern Ural, pine-broadleaf ecotone forests were widespread during the early Holocene time, but now have persisted as relic plant communities. This study aimed to analyze the current potential range and to model changes in habitat suitability of relic pine-broadleaf ecotone forests of the suballiance under scenarios of moderate (RCP4.

Draft genome sequence of perfluorinated acids C-C degrading bacterium 5(3), isolated from soil contaminated with pesticides.

The P 5(3) strain is a potential degrader of persistent perfluorinated pollutants, particularly C-C perfluorinated acids. The genome of the strain has been fully sequenced. It consists of a chromosome with a length of 5,676,241 base pairs and a G-C content of 64.

Immunolocalization of Jasmonates and Auxins in Pea Roots in Connection with Inhibition of Root Growth under Salinity Conditions.

Inhibition of root elongation is an important growth response to salinity, which is thought to be regulated by the accumulation of jasmonates and auxins in roots. Nevertheless, the mechanisms of the interaction of these hormones in the regulation of the growth response to salinity are still not clear enough. Their better understanding depends on the study of the distribution of jasmonates and auxins between root cells.

Evolution End Classification of Gene Clusters Mediating Bacterial Degradation of 2,4-Dichlorophenoxyacetic Acid (2,4-D).

The ( and ) are gene clusters originally discovered in plasmid pJP4 which are involved in the bacterial degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) via the ortho-cleavage pathway of chlorinated catechols. They share this activity, with respect to substituted catechols, with clusters and . Although great effort has been devoted over nearly forty years to exploring the structural diversity of these clusters, their evolution has been poorly resolved to date, and their classification is clearly obsolete.

Effect of Gene Induction in Transgenic Tobacco Plants on Hydraulic Conductance, Formation of Apoplastic Barriers and Aquaporin Activity under Heat Shock.

Cytokinins are known to keep stomata open, which supports gas exchange and correlates with increased photosynthesis. However, keeping the stomata open can be detrimental if the increased transpiration is not compensated for by water supply to the shoots. In this study, we traced the effect of (isopentenyl transferase) gene induction, which increases the concentration of cytokinins in transgenic tobacco plants, on transpiration and hydraulic conductivity.

Effect of Low Light Stress on Distribution of Auxin (Indole-3-acetic Acid) between Shoot and Roots and Development of Lateral Roots in Barley Plants.

Depending on their habitat conditions, plants can greatly change the growth rate of their roots. However, the mechanisms of such responses remain insufficiently clear. The influence of a low level of illumination on the content of endogenous auxins, their localization in leaves and transport from shoots to roots were studied and related to the lateral root branching of barley plants.

Influence of Plant Growth-Promoting Rhizobacteria on the Formation of Apoplastic Barriers and Uptake of Water and Potassium by Wheat Plants.

The formation of apoplastic barriers is important for controlling the uptake of water and ions by plants, thereby influencing plant growth. However, the effects of plant growth-promoting bacteria on the formation of apoplastic barriers, and the relationship between these effects and the ability of bacteria to influence the content of hormones in plants, have not been sufficiently studied. The content of cytokinins, auxins and potassium, characteristics of water relations, deposition of lignin and suberin and the formation of Casparian bands in the root endodermis of durum wheat ( Desf.

Effects on 2,4-D and Humic Substances on the Growth, Pigment Indices and Concentration of Hormones in Wheat Seedlings Grown under Water Deficit.

The search for ways to increase plant productivity in drought conditions is of fundamental importance, since soil moisture deficiency is widespread and leads to critical crop losses. The aim of this study was to identify the effects of plant growth-promoting bacteria and humic substances on the growth, chlorophyll, flavonoids, nitrogen balance index, and concentration of cytokinins and abscisic acids in wheat plants grown in the laboratory under conditions of water deficit. An increase in the accumulation of plant mass was shown during the treatment of wheat plants with 2,4-D and humic substances in these conditions.

Effects of a Strain on the Lipid Transfer Proteins, Appoplast Barriers and Activity of Aquaporins Associated with Hydraulic Conductance of Pea Plants.

Lipid transfer proteins (LTPs) are known to be involved in suberin deposition in the Casparian bands of pea roots, thereby reinforcing apoplast barriers. Moreover, the IB-Ki14 strain accelerated formation of the Casparian bands in wheat plants, although involvement of LTPs in the process was not studied. Here, we investigated the effects of IB-Ki14 on LTPs, formation of the Casparian bands, hydraulic conductance and activity of aquaporins (AQPs) in pea plants.

Complete Genome Sequences of sp. Strains B-10 and H-1, Isolated from the Water in the Shulgan-Tash Cave.

In this article, we report the complete genome sequences of sp. strains B-10 (RCAM05335) and H-1 (RCAM05339), which were isolated from the water of the Dal'nee Verkhnee Lake in the Shulgan-Tash cave in Russia (53°2'0″N, 57°3'0″E). The sequences were obtained using an Oxford Nanopore Technologies MinION system.

Influence of Bacteria of the Genus on Leguminous Plants and Their Joint Application for Bioremediation of Oil Contaminated Soils.

The modern approach to the creation of biological products to stimulate plant growth is based on the study of specific inter-bacterial interactions. This study describes the impact that the introduction of strains of the genus has on annual and perennial leguminous plants and the ecosystem of the leguminous plant-the indigenous microbial community. The objects of research under the conditions of vegetation experiments were plants of field peas ( L.

PGP-Bacterium Improves Bread Wheat Growth and Mitigates Herbicide and Drought Stress.

The reaction of plants to simultaneous stress action and treatment with biological stimulants still remains poorly studied. Laboratory and field experiments have been conducted to study the growth and yield of bread wheat ( L.) of the variety Ekada 113; stress markers and quantitative ratios of phytohormones in plants under insufficient soil moisture; the effects of spraying with herbicide containing 2,4-D and dicamba and growth-stimulating bacterium DA1.

Analysis of the Potential Range of L. (Kunth) and Its Changes under Moderate Climate Change in the 21st Century.

The study shows the analysis of the current potential range and the modeling of its changes in the hemiboreal species . The models show the habitat suitability for under moderate climatic changes (RCP4.5) in the middle and second half of the 21st century.

Effect of Salinity on Stomatal Conductance, Leaf Hydraulic Conductance, HvPIP2 Aquaporin, and Abscisic Acid Abundance in Barley Leaf Cells.

The stomatal closure of salt-stressed plants reduces transpiration bringing about the maintenance of plant tissue hydration. The aim of this work was to test for any involvement of aquaporins (AQPs) in stomatal closure under salinity. The changes in the level of aquaporins in the cells were detected with the help of an immunohistochemical technique using antibodies against HvPIP2;2.

Complete Genome Sequence of sp. Strain RCAM05350 from Shulgan-Tash Karst Cave.

The Shulgan-Tash cave is an extremely interesting object for scientific research, located in the Republic of Bashkortostan (Russia). In this article, we report the complete genome sequence of sp. strain RCAM05350 isolated from the "cave silver" biofilms.

Phytohormones 2020.

The hormonal system plays a decisive role in the control of plant growth and development [...

The Role of Aquaporins in Plant Growth under Conditions of Oxygen Deficiency.

Plants frequently experience hypoxia due to flooding caused by intensive rainfall or irrigation, when they are partially or completely submerged under a layer of water. In the latter case, some resistant plants implement a hypoxia avoidance strategy by accelerating shoot elongation, which allows lifting their leaves above the water surface. This strategy is achieved due to increased water uptake by shoot cells through water channels (aquaporins, AQPs).

Dynamic mechanism of phase variation in bacteria based on multistable gene regulatory networks.

Phase variation, which causes splitting the homogeneous bacterial population into subpopulations of the cells with different and reversible activity of the same variable genes, provide bacteria with wide opportunities to implement their adaptation strategies. Meanwhile, the gene networks perform integral regulation of the genome and control over the formation of phenotypic traits of the organism. Mechanisms of phase variation, such as genomic rearrangements and DNA methylation, affect the regulatory contours of gene networks.

Effects of Humic Substances on the Growth of 2,4-D and Wheat Plants Inoculated with This Strain.

Both rhizosphere bacteria and humic substances (HSs) can promote plant growth when applied individually and even greater effects of their combination have been demonstrated. We aimed to elucidate the relative importance of the stimulating effects of HSs on bacterial growth and the effects of the combination of bacteria and HSs on plants themselves. The effects of humic (HA) and fulvic acids (FA) (components of humic substances) on the growth of 2,4-D in vitro were studied.

The Effects of Rhizosphere Inoculation with on Formation of Apoplast Barriers, HvPIP2 Aquaporins and Hydraulic Conductance of Barley.

strain IB-Ki14 has recently been shown to strengthen the apoplastic barriers of salt-stressed plants, which prevents the entry of toxic sodium. It was of interest to find out whether the same effect manifests itself in the absence of salinity and how this affects the hydraulic conductivity of barley plants. Berberine staining confirmed that the bacterial treatment enhanced the deposition of lignin and suberin and formation of Casparian bands in the roots of barley plants.

Effects of Phytohormone-Producing Rhizobacteria on Casparian Band Formation, Ion Homeostasis and Salt Tolerance of Durum Wheat.

Inoculation with plant growth-promoting rhizobacteria can increase plant salt resistance. We aimed to reveal bacterial effects on the formation of apoplastic barriers and hormone concentration in relation to maintaining ion homeostasis and growth of salt-stressed plants. The rhizosphere of a durum wheat variety was inoculated with cytokinin-producing and auxin-producing strains.

The Novel Strain Acidomyces acidophilum Isolated from Acidophilic Biofilms (Snottites) Located in the Sheki-Heh Cave (North Caucasus).

A novel acidophilic fungal strain isolated from snottites in the active sulfuric acid speleogenesis (SAS) Sheki-Heh Cave (North Caucasus, Chechen Republic) was identified and characterized. The Sheki-Heh Cave is one of three cavities of the joint SAS speleosystem; to date, it remains the only of such cave explored in Russia. Highly acidic biofilms termed snottites are found sporadically on the cave roof in sulfurous water degassing zones.

The Baltic Sea methane pockmark microbiome: The new insights into the patterns of relative abundance and ANME niche separation.

Pockmarks are important "pumps", which are believed to play a significant role in the global methane cycling and harboring a unique assemblage of very diverse prokaryotes. This study reports the results of massive sequencing of the 16S rRNA gene V4 hypervariable regions for the samples from thirteen pockmark horizons (the Baltic Sea) collected at depths from 0 to 280 cm below seafloor (cmbsf) and the rates of microbially mediated anaerobic oxidation of methane (AOM) and sulfate reduction (SR). Altogether, 76 bacterial and 12 archaeal phyla were identified, 23 of which were candidate divisions.

Pteridophyte distribution of the Urals and adjacent areas: a dataset.

Background: Data on the species diversity and distribution of pteridophytes (lycophytes and ferns) in the Urals and adjacent areas are presented. The dataset includes 13,742 observations of two classes Lycopodiopsida and Polypodiopsida. In total, the dataset contains information on 16 families, 28 generas, 65 species, four subspecies and nine interspecies hybrids.