
Guzel KudoyarovaUfa Institute of Biology of Russian Academy of Sciences · Plant Physiology
Guzel Kudoyarova
Full Professor
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197
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Introduction
Publications
Publications (197)
The role of the nitrate and ABA transporter (NRT1.2) in the growth response of Arabidopsis plants to sodium chloride salinity was studied. Mutants for this gene (nrt1.2) and plants of the parent Wassilewskija line (Ws) were grown on liquid Hoagland-Arnon medium. NaCl was added to half of the vessels to a final concentration of 150 mmol/l. In Ws pla...
The influence of abscisic acid (ABA)-metabolizing bacterial strains of the genera Pseudomonas and Arthrobacter on the hormone content in the shoots and roots of wheat plants, as well as in a sandy substrate during dense planting, has been studied. The ability of bacteria to reduce the ABA content in the growing environments and in plants, albeit to...
With increasing planting density, ABA accumulates in plants and their growth is inhibited even before resource deficit occurs. In this study, an attempt was made to mitigate this negative manifestation of competition by inoculating lettuce plants with ABA degrading bacteria belonging to Pseudomonas. In laboratory experiments simulating planting den...
The review examines modern knowledge on the mechanisms of the early stages of plant cell elongation growth. Coleoptiles are used as a model object representing juvenile organs of cereal seedlings. Elongation growth is considered to be a protective morphophysiological stage of seedling development during underground germination. The molecular mechan...
High-density planting can increase crop productivity per unit area of cultivated land. However, the application of this technology is limited by the inhibition of plant growth in the presence of neighbors, which is not only due to their competition for resources but is also caused by growth regulators. Specifically, the abscisic acid (ABA) accumula...
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 th...
Background
Plant growth promoting rhizobacteria (PGPR) often increase leaf area. Since water loss by transpiration is proportional to leaf area, adaptive responses will be required if further growth is not to be compromised by plant water deficits. However, studies of water relations of plants growing in soil enriched with PGPR have yielded conflic...
The phytoremediation of soil contaminated with petroleum depends on the association of plants with rhizosphere bacteria capable of promoting plant growth and destroying petroleum hydrocarbonates. In the present work, we studied the effects of “Lenoil” biological product containing bacteria Pseudomonas turukhanskensis IB 1.1, capable of destroying p...
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 ipt (isopentenyl transferase) gene induction, which incr...
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 late...
Restoring forests in areas where they once stood is an important step towards increasing carbon sequestration. However, reforestation requires an increase in current levels of seedling production in the tree nurseries. The purpose of this work was to study the effectiveness of preparations based on bacteria and humic substances (HSs) to stimulate t...
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 pl...
On March 3, 2024, sad news spread among Russian plant physiologists: an outstanding scientist and wonderful person, Farida Minnikhanovna Shakirova, died. Friends and colleagues exchanged letters in an attempt to honor her memory. Members of Editorial board of the journal “Ecobiotech”, created by colleagues F.M. Shakirova, decided to write about her...
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 inde...
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 Pseudomonas mandelii 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 t...
Increased auxin levels in root primordia are important in controlling root branching, while their interaction with abscisic acid (ABA) likely regulates lateral root development in water-deficient plants. The role of ABA accumulation in regulating root branching was investigated using immunolo-calization to detect auxin (indoleacetic acid, IAA) and...
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...
The hormonal system plays a decisive role in the control of plant growth and development [...]
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 st...
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....
We used the enzyme-linked immunosorbent assay (ELISA) to assess the level of endogenous hormones in spruce pollen, and immunolocalization and confocal microscopy to study hormone localization in spruce and tobacco pollen. During pollen activation, the levels of ABA, zeatin, and its riboside significantly decreased. After the initiation of polar gro...
Pseudomonas mandelii 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 c...
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-produci...
As a model for the changes in the content of endogenous cytokinins, ipt-transgenic tobacco plants (Nicotiana tabacum L. cv. Petit Havana SR-1) were used. The total heating of plants caused the accumulation of cytokinins in shoots and a decrease in the delivery of auxins with phloem flow. The effect of cytokinins on the transport of auxins through t...
In this study, we discovered the effect of the induction of the ipt gene, which increases the concentration of cytokinins in transgenic tobacco plants, on transpiration and hydraulic conductance. The novelty of the work was to study the mechanisms of involvement of cytokinins in the regulation of the hydraulic conductivity of tobacco plants with an...
There are two main pathways for water transport in plants. One of them is water transport along the cell walls and xylem vessels, called apoplastic pathway, and the other is from cell to cell through the membrane water channels aquaporins. Formation of Casparian bands by suberin and lignin deposition reduces conductivity of the apoplastic pathway....
Changes in root elongation are important for the acquisition of mineral nutrients by plants. Plant hormones, cytokinins, and abscisic acid (ABA) and their interaction are important for the control of root elongation under changes in the availability of ions. However, their role in growth responses to supra-optimal concentrations of nitrates and pho...
An ABA-deficient barley mutant (Az34) and its parental cultivar (Steptoe) were compared. Plants of salt-stressed Az34 (100 mmol m−3 NaCl for 10 days) grown in sand were 40% smaller than those of “Steptoe”, exhibited a lower leaf relative water content and lower ABA concentrations. Rhizosphere inoculation with IB22 increased plant growth of both gen...
Lipid transfer proteins (LTPs) participate in many important physiological processes in plants, including adaptation to stressors, e.g., salinity. Here we address the mechanism of this protective action of LTPs by studying the interaction between LTPs and abscisic acid (ABA, a “stress” hormone) and their mutual participation in suberin deposition i...
The role of reactive oxygen species (ROS) in ABA-induced increase in hydraulic conductivity was hypothesized to be dependent on an increase in aquaporin water channel (AQP) abundance. Single ABA application or its combination with ROS manipulators (ROS scavenger ascorbic acid and NADPH oxidase inhibitor diphenyleneiodonium chloride (DPI)) were stud...
Much attention is paid to the relationship between bacteria and plants in the process of the bioremediation of oil-contaminated soils, but the effect of petroleum degrading bacteria that synthesize phytohormones on the content and distribution of these compounds in plants is poorly studied. The goal of the present field experiment was to study the...
Plant-bacteria consortia are more effective in bioremediation of petroleum contaminated soil than when either organism is used individually. The reason for this is that plant root exudates promote growth and activity of oil degrading bacteria. However, insufficient attention has been paid to the ability of bacteria to influence root exudation. Ther...
Plants respond to drying soil by either avoiding leaf water deficits (drought avoidance) or tolerating low tissue water status (drought tolerance). Plant species differ in their capacity for either drought avoidance or tolerance, with some of them preventing tissue water potential falling below a critical level (isohydric behaviour), whereas others...
Maintenance of active plant growth is important for successful phytoremediation of soil contaminated with petroleum oil products. Strains of oil-degrading bacteria introduced into rhizosphere were found to reduce the extent of plant growth inhibition resulting from petroleum stress. The effect was due to combining the capacity for petroleum degrada...
The contents of auxin (indole-3-acetic acid, IAA), cytokinins, and abscisic acid (ABA) were determined in explants (megagametophyte and embryo), proliferating embryonal-suspensor mass (ESM), and non-embryogenic callus of Pinus sibirica and Larix sibirica. Furthermore, the localization of hormones in the cells was studied with immunohistochemical an...
The trans-membrane carrier AtENT3 is known to transport externally supplied cytokinin ribosides and thus promote uptake by cells. However, its role in distributing either exogenous or endogenous cytokinins within the intact plant has not hitherto been reported. To test this, we used ent3-1 mutant Arabidopsis seedlings in which the gene is not expre...
The relationship between the effect of ABA on morphogenesis in vitro and auxin transport, as well as the role of peroxidases in the action of ABA on morphogenesis in vitro in the ABA-deficient barley mutant AZ34 and its parent form cv. Steptoe was studied.
Here we analyze the dependence of the growth and water relations on the ability of bacteria to influence the content and distribution of abscisic acid (ABA) in plants under different growing conditions.
The mechanisms of the effect of bacteria oxidizing hydrocarbons and synthesizing hormones on plant resistance to oil pollution of the soil are studied.
Although changes in root architecture in response to the environment can optimize mineral and water nutrient uptake, mechanisms regulating these changes are not well-understood. We investigated whether P deprivation effects on root development are mediated by abscisic acid (ABA) and its interactions with other hormones. The ABA-deficient barley mut...
Although salinity inhibits plant growth, application of appropriate rhizosphere bacteria can diminish this negative effect. We studied one possible mechanism that may underlie this beneficial response. Wheat plants were inoculated with Bacillus subtilis IB-22 and Pseudomonas mandelii IB-Ki14 and their consequences for growth, water relations, and c...
Water deficits inhibit plant growth and decrease crop productivity. Remedies are needed to counter this increasingly urgent problem in practical farming. One possible approach is to utilize rhizobacteria known to increase plant resistance to abiotic and other stresses. We therefore studied the effects of inoculating the culture medium of potato mic...
The phytoremediation of soil contaminated with petroleum oil products relies on co-operation between plants and rhizosphere bacteria, including the plant growth-promoting effect of the bacteria. We studied the capacity of strains of Pseudomonas, selected as oil degraders, to produce plant hormones and promote plant growth. Strains with intermediate...
The involvement of wheat germ agglutinin (WGA) in the protective action of 24-epibrassinolide (EBR) against drought stress was studied in the seedling roots of two wheat cultivars differing in drought tolerance. Under dehydration conditions, the contents of ABA and WGA were shown to change significantly in the roots of either drought-tolerant culti...
The nitrogenous base riboside transporter ENT3 is known for its ability to transport ribosylated cytokinins across the membrane. However, its role in the distribution of cytokinins between plant organs has not yet been studied. For this purpose, we compared the content and distribution of either endogenous cytokinins or the exogenous trans-zeatin r...
Сytokinins content, concentration of sodium and potassium ions and K+/Na+ratio in wheat plants (Triticum durum Desf., Bashkirskaya 27) were evaluated under salinity during treatment with hormone-producing bacteria Pseudomonas mandelii IB-Ki14 (auxin-producer) or Bacillus subtilis IB-22 (cytokinin-producer). An increased level of cytokinins was obse...
Dynamics of abscisic acid (ABA) and indole-3-acetic acid (IAA) contents were followed in developing barley caryopses of the ABA-deficient mutant AZ34 and its parental cultivar Steptoe. Distribution of these hormones and HvPIP2 aquaporins (AQPs) was studied with the help of immunohistochemical methods in the roots and coleorhiza of developing embryo...
The capacity of rhizoshere bacteria to influence plant hormonal status, by bacterial production or metabolism of hormones, is considered an important mechanism by which they promote plant growth, and productivity. Nevertheless, inoculating these bacteria into the plant rhizosphere may produce beneficial or detrimental results depending on bacterial...
Increase in the level of mineral nutrition reduces the relative growth rate of the roots, which adversely affects the drought resistance of plants. This was not observed when fertilizers were locally applied. Local fertilizer treatment caused activation in the elongation of the roots that were not directly in contact with locally applied fertilizer...
Bacterization of the seeds of spring durum wheat with the strains of gram-positive aerobic spore-forming bacteria Bacillus subtilis IB-21 and B. subtilis IB-22 and gram-negative bacteria Advenella kashmirensis IB-К1and Pseudomonas extremaustralis IB-К13-1А was performed to study its effect on the productivity of plants, their hormonal content and r...
The effect of a number of phytohormones (IAA, ABA, and cytokinines) on the induction of in vitro somatic embryogenesis in callus cultures of wheat, cultivar Bashkirskaya 26, barley, cultivar Steptoe, and its ABA-deficient mutant AZ34 has been studied. It was shown that the ability or inability for somatic embryogenesis in callus tissue of both whea...
We carried out immunoassay of plant hormones [indoleacetic acid (IAA), cytokinins and abscisic acid (ABA)] in the extracts from explants (megagametophytes and embryos) and from four long-term proliferating embryogenic cell lines of Larix sibirica. Immunohistochemical detection of hormones has also been performed at the stage of initiation of somati...
The article presents the results of research into the effect of removing phosphate from a nutrient medium on the content of auxins and cytokinins in roots, root elongation and content of reactive oxygen species in root tips of the barley ‘Steptoe’. In our experiments, the growth response was detected as root elongation after a 4-day exposure to a p...