Imre MajláthCentre for Agricultural Research · Department of Plant Physiology
Imre Majláth
PhD Biology
About
59
Publications
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784
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Introduction
I am interested in plant biology at both individual and supra-individual levels. Our team aims to establish the crosstalk and similarities in the assimilation of C3 and C4 monocotyledonous and dicotyledonous vegetable crop plants under moderate water deprivation and different light conditions at suboptimal temperature using various research approaches and tools. Apart from that, I have some experience in conservation biology, vegetation science and geoinformatics too.
Additional affiliations
October 2008 - present
Centre for Agricultural Research
Position
- Research Associate
Publications
Publications (59)
Polyamines are multifaceted compounds which play a role in regulating plant growth and stress tolerance in interactions with plant hormones. The aim of the present study was to reveal how exogenous polyamines influence the synthesis of salicylic acid, with a special emphasis on the effect of salicylic acid deficiency on the polyamine metabolism and...
Cold-acclimation is essential for the development of adequate frost-hardiness in cereals and therefore sudden freezes can cause considerable damage to the canopy. However, timely adding of an appropriate signal in the absence of cold acclimation may also harden wheat for the upcoming freeze. The feasibility of the promising signal molecule methylgl...
Natural ecosystems including host-pathogen interactions produce a plethora of biogenic volatile organic compounds (BVOCs). Infections by phytopathogens change the volatile profile substantially and dynamically over a crop field or even on a larger scale. Despite their worldwide importance in agriculture little is known about the BVOC emissions of c...
Currently, limited knowledge is available about the combined effects of drought and light in case of cold stress.
The investigation of quantum yield kinetics may help understand how plants utilize light under adverse environmental
conditions. In the present study, mild drought helped preserve quantum yield in durum wheat (Triticum durum L.).
The ti...
Maize is sensitive to cold injury, especially during germination. Since cold causes oxidative stress, compounds that promote the accumulation of free radical forms, such as the reactive aldehyde (RA) methylglyoxal (MG), may be suitable to trigger a systemic defense response. In this study, maize seeds were soaked in MG solution for one night at roo...
Although light-emitting diode (LED) technology has extended the research on targeted photomorphogenic, physiological, and biochemical responses in plants, there is not enough direct information about how light affects polyamine metabolism. In this study, the effect of three spectral compositions (referred to by their most typical characteristic: bl...
Maize is susceptible to cold injury, particularly during germination. Compounds that enhance the accumulation of free radical forms, such as the reactive aldehyde (RA) methylglyoxal (MG), may be ideal to initiate a systemic defense response since cold triggers oxidative stress. Maize seeds were soaked in MG solution at room temperature for one nigh...
Although the relationship between polyamines and photosynthesis has been investigated at several levels, the main aim of this experiment was to test light-intensity-dependent influence of polyamine metabolism with or without exogenous polyamines. First, the effect of the duration of the daily illumination, then the effects of different light intens...
The exposure of plants to non-lethal low temperatures may increase their tolerance to a subsequent severe chilling stress. To some extent, this is also true for cold-sensitive species, including maize. In the present work, based on our previous microarray experiment, the differentially expressed genes with phenylpropanoid pathways in the focus were...
Salicylic acid (SA) plays a role in several physiological processes in plants. Exogenously applied SA is a promising tool to reduce stress sensitivity. However, the mode of action may depend on how the treatment was performed and environmental conditions may alter the effects of SA. In the present study the physiological and biochemical effects of...
The biochemistry of ROS is well-described, however, less is known about that how reactive aldehyde forms (RA) affect the plant assimilation under various stress conditions. RA forms like methylglyoxal (MG) may originate from the lipid peroxidation or the non-enzymatic breakdown of triose-phosphates during imbalance of glycolysis and photosynthesis....
The biochemistry of ROS is well-described, however, less is known about that how reactive aldehyde forms (RA) affect the plant assimilation under various stress conditions. RA forms like methylglyoxal (MG) may originate from the lipid peroxidation or the non-enzymatic breakdown of triose-phosphates during imbalance of glycolysis and photosynthesis....
The effect of CO 2 on the net photosynthetic performance of C3 and C4 crop plants under combined abiotic stress * majlath.imre@agrar.mta.hu Water loss and cold have undesirable effect on plant assimilation. When they act together, however, potential acclimation effect can be observed. Light intensity is a further factor affects the proccesses of ph...
The effect of CO 2 on the net photosynthetic performance of C3 and C4 crop plants under combined abiotic stress * majlath.imre@agrar.mta.hu Water loss and cold have undesirable effect on plant assimilation. When they act together, however, potential acclimation effect can be observed. Light intensity is a further factor affects the proccesses of ph...
Az oxidatív stressz a reaktív oxigén formák (ROS) képződése mellett reaktív aldehid (RA)
formák keletkezését is maga után vonja. Számos RA vegyület előfordul a sejtben, melyek
elsősorban lipidperoxidáció útján vagy a glikolízis köztitermékeinek átalakulása során
jönnek létre. Ezek a vegyületek kettős oxigénkötést tartalmaznak, melyek képesek a
fehé...
Exposure of plants to low temperature in the light may induce photoinhibitory stress symptoms, including oxidative damage. However, it is also known that light is a critical factor for the development of frost hardiness in cold tolerant plants. In the present work the effects of light during the cold acclimation period were studied in chilling-sens...
Episcythris triangulella (Ragonot, 1874) is a species from the Scythrididae family. Present paper shows the first known occurrence of E. triangulella from Hungary, Central Eu-rope. The occurrence of this Holomediterreanean species in Hungary suggests that its area may spread towards to north. We can conclude that, this moth is a new species of the...
Polyamine metabolism is in relation with several metabolic pathways and linked with plant hormones or signalling molecules; in addition polyamines may modulate the up- or down-regulation of gene expression. However the precise mechanism by which polyamines act at the transcription level is still unclear. In the present study the modifying effect of...
In several cases a correlation was found between polyamines and abiotic stress tolerance. However, the individual polyamines may have different effects, which also vary depending on the type of treatment. When applied as seed soaking or added hydroponically 0.5 mM putrescine and spermidine, different changes were induced during 50 µM cadmium stress...
A significant amount of cereal crop plants is grown worldwide for food industry, which makes them one of the most important plants. The yield of these plants is highly affected by extreme weather conditions caused by global climate change. Adequate nitrogen supply is essential for plant growth and development. The change of the nitrogen metabolism...
As a consequence of global climate change, extreme values of annual temperatures or rainfall distribution are becoming increasingly frequent in the world. Low temperature and water shortage have deleterious effects on the sustenance of assimilation. However, their potential acclimation effect is less well-known at low temperature.
Photosynthesis is...
Salinity-induced osmotic, ionic and oxidative stress responses were investigated on Asakaze/Manas wheat/barley addition lines 7H, 7HL and 7HS, together with their barley (salt-tolerant) and wheat (relatively salt-sensitive) parents. Growth, photosynthetic activity, chlorophyll degradation, proline, glycine betaine accumulation, sugar metabolism, Na...
List of gene-specific PCR primers used in the study.
(DOC)
Conjugated Polyamine (PA) content in the roots and shoots of different genotypes (wheat/barley disomic addition line 7H, ditelosomic addition lines 7HL and 7HS, wheat cv. Asakaze: AK and barley cv. Manas) grown in hydroponic solution with and without salt treatment.
Data are means ± SD of three replicates per treatment. * and # indicate values sign...
K/Na ratio in the roots and shoots of different genotypes (wheat/barley disomic addition line 7H, ditelosomic addition lines 7HL and 7HS, wheat cv. Asakaze: AK and barley cv. Manas).
(TIF)
Total soluble sugar content in the leaves of different genotypes (wheat/barley disomic addition line 7H, ditelosomic addition lines 7HL and 7HS, wheat cv. Asakaze: AK and barley cv. Manas) grown in hydroponic solution with or without salt treatment.
Data are means ± SD of five replicates per treatment. Different letters indicate significant differe...
Discrimination of barley (red) and wheat (blue) mitotic chromosomes by Genomic In Situ Hybridization (GISH) in 7H Asakaze/Manas disomic addition (partial cell) (a), 7HS Asakaze/Manas ditelosomic addition (b) and 7HL Asakaze/Manas ditelosomic addition (c) lines.
For method of GISH labelling see in [22].
(TIF)
Ct values of CDC(a) and RIL(a) genes when expressed in control and salt-treated leaves.
(TIF)
Root and shoot length of wheat/barley addition lines 7H, 7HL and 7HS and their wheat cv. Asakaze and barley cv. Manas parents before salt treatment and at the end of the experiment with (salt-treated) or without (control) salt application.
(DOC)
Activity of the antioxidant enzymes Glutathione Reductase (GR), ascorbate reductase (APX), Monodehydroascorbate Reductase (MDHAR), catalase and Glutathione-S-Transferase (GST) in the roots and leaves of wheat cv. Asakaze: AK, barley cv. Manas and addition lines 7H, 7HL and 7HS.
(DOC)
Photosynthetic activity, stomatal conductance and SPAD chlorophyll content in wheat cv. Asakaze, barley cv. Manas and addition lines 7H, 7HL and 7HS.
(DOC)
This is the first bryofloristic study in the Martonvásár manor park. In our survey in 2015, 56 species (6 liverworts and 50 mosses) were found in the park. Most of them are considered to be common in Hungary, but an endangered (Eurhynchium speciosum), a vulnerable (Orthotrichum patens) and five near-threatened species (Aphanorrhegma patens, Orthotr...
Salicylic acid is a promising compound for the reduction of stress sensitivity in plants. Although several biochemical and physiological changes have been described in plants treated with salicylic acid, the mode of action of the various treatments has not yet been clarified. The present work reports a detailed comparative study on the effects of d...
The subject of the present study is the monitoring of the hardwood groves at the Mar-tonvásár Manor Park with the involvement of 20 earlier (recorded in 1980–1981) and 20 current (recorded in 2011–2012) phytocoenological relevés. The manor park was created in the first half of the 19th century. Since then the woods along the St László stream have d...
Current observation of Rhynchaenus xylostei Clairville, 1798 from Hungary is presented and can be considered as rediscovery of this beetle aft er 100 years in Hungary. Historical data of the species are summarised. Th e species is new to the fauna of Croatia and Romania. With 2 fi gures.
C-repeat binding factor 14 (CBF14) is a plant transcription factor that regulates a set of cold-induced genes, contributing
to enhanced frost tolerance during cold acclimation. Many CBF genes are induced by cool temperatures and regulated by day length and light quality, which affect the amount of accumulated
freezing tolerance. Here we show that a...
We examined the interactions of an exogenously added non-proteinogenic amino acid, S-methylmethionine (SMM) and UV-B radiation in young maize plants. We observed that exposure to UV-B light caused a substantial increase in both the phenolics and anthocyanin contents. Pretreatment with SMM also induced a slight, but statistically significant increas...
The salt stress responses of wheat-barley addition lines (2H, 3H, 3HS, 4H, 6H, 7H and 7HL) were compared to those of the parental genotypes wheat cv. Asakaze and barley cv. Manas and two other wheat genotypes [Chinese Spring (CS) and Mv9kr1] during germination and in young plants grown in hydroponic culture with or without salt treatment. Among the...
Hodebertia testalis (Fabricius, 1794) is a species from the Crambidae family and widespread in the subtropical and tropical areas of Africa and Eurasia. Beside the Medi-terranean regions in Europe, this moth has been only found in the southern British Isles. No observations are known from Central and Eastern Europe. It spreads to the north parts of...
Under natural conditions plants are often subjected to multiple stress factors. The main aim of the present work was to reveal how UV-B radiation affects acclimation to other abiotic stressors. Wheat seedlings grown under normal light conditions or normal light supplemented with UV-B radiation were exposed to drought or Cd stress and were screened...
Numerous Macrolepidoptera species have been found in Kisújszállás in the last few years. Complementing the authors' earlier data, new species have been discovered and described for the local Macrolepidoptera fauna. The detailed list with basic faunistic attributes also can be found in this work. In addition to the occurrences of the recent species...
Freezing tolerance is the result of a wide range of physical and biochemical processes, such as the induction of antifreeze proteins, changes in membrane composition, the accumulation of osmoprotectants, and changes in the redox status, which allow plants to function at low temperatures. Even in frost-tolerant species, a certain period of growth at...
Plants detect the presence of neighbouring vegetation through monitoring changes in the ratio of red (R) to far-red (FR) wavelengths (R:FR) in ambient light. Reductions in R:FR are perceived by the phytochrome family of plant photoreceptors and initiate a suite of developmental responses termed the shade avoidance syndrome. These include increased...
The effect of light on gene expression and hormonal status during the development of freezing tolerance was studied in winter wheat (Triticum aestivum var. Mv Emese) and in the spring wheat variety Nadro. Ten-day-old plants (3-leaf stage) were cold hardened at 5°C for 12 days under either normal (250 µmol m(-2) s(-1) ) or low (20 µmol m(-2) s(-1) )...
A preliminary study in the vegetation of a small town with local interest.
Alterations in temperature adaptation processes and changes in the content of stress-related compounds, polyamines and salicylic acid were evaluated in Atnoa1 (NO-associated 1) Arabidopsis mutant. The F(v)/F(m) chlorophyll-a fluorescence induction parameter and the actual quantum yield were significantly lower in the Atnoa1 mutant than in the wild-...
TLow temperature is a significant limiting factor on plant development in the temperate zones. We tried to explore certain steps of the cold-signalling focused on salicylic acid (SA) and ascorbic acid (AA) using Arabidopsis thaliana as a model. The results of the freezing survival tests showed that both the wild type and mutant plants had better fr...
The present work was focused on evaluating the effect of the Atnoa1 mutation on temperature adaptation processes and on changes in the content of stress-related compounds, polyamines and salicylic acid. Freezing tests indicated that cold acclimation substantially in-creased the freezing tolerance of Atnoa1 mutant plants, similarly to the wild type,...
Questions
Questions (5)
Dear Colleagues, I would like to know, that how are geo coordinates obtained from the actual version of google maps accurate? Are they 'quasi absolutely' (I know there is no absolut location determination)? In other words, if I record the geocoordinates of a field object (e.g. a smaller tree or schrub in a meadow) using a two-frequency geodetic GPS receiver and I also obtain from the geocoordinates of the same object from the the Google maps layer, are these lat and lon coordinates quasi the same or there is a deviation berween the coordinates recorded by high precision receiver and the coordinates derived from the software? I mean question in the same coordinate system, of course. Sorry for my question, but I am not a GIS expert, just a biologist, so I am a little bit confused regarding that. And I must to know it for field measurement purpose. I am waiting for you helpful answers, Thanks, Imre
I have 2133 log2FC values of six treatment (attached in xlsx file). A data arrangement is arranged for the requirements of xlstat. I would like to perform a volcano plot analysis.
I have tried the demo (36 columns of data) of xlstat for omics --> Different expression tool, in which the Parametric test works properly and results 'regular' volcano plot in order to distinguish the differentially expressed genes on that dataset.
My dataset, however, is smaller than above in the demo (six columns of data) and I can not perform Parametric test. The Nonparametric test is allowed only which results an 'irregular(?..)' volcano plot.
Does anybody have idea what do I wrong? Is it possible that my dataset 2133 rows and six columns - does not allow using Parametric test?
Thanks for the answers.
Dear Colleagues,
Could anybody please tell me why Parametric Analysis of Gene Set Enrichment (PAGE) in agriGO v2.0 needs too long time? I input 1770 probe identifiers (rows) with two extra columns of fold change data, my job has been submitted successfully. The analysis is running, 'Parsing query list availability ... Done' but it seems analysis never stop ..... ?
Does anybody have any experience on it?
Thanks in advance.
Dear All, could youh suggest any helpful tool to perform a detailed gene ontology analysis? I used AgriGO SEA but the overrepresented GO categories not detailed enough.I mean that e.g. there is category 'catalytic activity' is a main category within 'molecular function' ; it's too general, and I would like to obtain certain subcategories within the maon category.
Thanks to all for the help.
I have to do a similarity analysis between gene expression patterns comes from a microarray experiment. I would like to try several softwares to perform PCA. Thank to the kind help in advance.
Projects
Projects (3)
The knowledge in reactive aldehyde (RA) tolerance is rarely utilized in plant breeding. A quick and cheap test, based on glutaraldehyde-spraying of intact plants, was previously developed to get information on the reactive aldehyde neutralizing capacity of plants. The distinction of the RA tolerance between the species and cultivars provides a basis for studying RA-detoxifying enzymes. In cases of higher response to RA-treatment a greater detoxifying enzyme level is expected which can be further characterised.
Confirmation of stress-related RA-detoxifying enzymes/genes may serve as breeding markers to develop
highly stress-resistant wheat and maize cultivars.
Global climate change, extreme values of annual temperatures or rainfall distribution have a great impact on the agricultural productivity. Numerous studies have been confirmed that the development of adequate frost-tolerance in plants requires a previous period with certain temperature and length. It is well-known that the role of the light is also pivotal during this acclimation period. Drought is primarily harmful to plant life, however, our preliminary experiment suggest that a certain level of water shortage can be advantageous to the sustenance of growth and development at low temperature. Both length of cold and the adequate level of water deprivation is still open to research.
In our study, we try to find the appropriate level of the factors, to reveal the background of the changes in assimilation and stress defence at both physiological, biochemical and genetic levels. We using wheat, durum wheat and maize cultivars with contrasting cold-tolerance in the experiments. Data of all species will be compared to unravel the differences in the assimilation strategies under adverse environmental conditions. Confirmation of possible stress-related genes may serve as breeding markers for plant breeding.