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Your search keyword '"Domonkos, Ildikó"' showing total 23 results
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23 results on '"Domonkos, Ildikó"'

3. The REPLUMLESS Transcription Factor Controls the Expression of the RECEPTOR-LIKE CYTOPLASMIC KINASE VI_A2 Gene Involved in Shoot and Fruit Patterning of Arabidopsis thaliana.

Author

Kenesi, Erzsébet, Beöthy-Fehér, Orsolya, Szőllősi, Réka, Domonkos, Ildikó, Valkai, Ildikó, and Fehér, Attila

Subjects
TRANSCRIPTION factors, GENE expression, BINDING sites, ARABIDOPSIS thaliana, GENES, ARABIDOPSIS, PHENOTYPES
Abstract

The promoter of the RECEPTOR-LIKE CYTOPLASMIC KINASE VI_A2 (RLCK VI_A2) gene contains nine binding sites for the REPLUMLESS (RPL) transcription factor. In agreement, the expression of the kinase gene was strongly downregulated in the rpl-4 mutant. Comparing phenotypes of loss-of-function mutants, it was revealed that both genes are involved in stem growth, phyllotaxis, organization of the vascular tissues, and the replum, highlighting potential functional interactions. The expression of the RLCKVI_A2 gene from the constitutive 35S promoter could not complement the rpl-4 phenotypes but exhibited a dominant positive effect on stem growth and affected vascular differentiation and organization. The results also indicated that the number of vascular bundles is regulated independently from stem thickness. Although our study cannot demonstrate a direct link between the RPL and RLVKVI_A2 genes, it highlights the significance of the proper developmental regulation of the RLCKVI_A2 promoter for balanced stem development. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Effects of lipids on the rate-limiting steps in the dark-to-light transition of Photosystem II core complex of Thermostichus vulcanus.

Author

Magyar, Melinda, Akhtar, Parveen, Sipka, Gábor, Domonkos, Ildikó, Wenhui Han, Xingyue Li, Guangye Han, Jian-Ren Shen, Lambrev, Petar H., and Garab, Győző

Subjects
PHOTOSYSTEMS, STRUCTURAL dynamics, EXTRACELLULAR matrix proteins, PHOSPHATIDYLGLYCEROL, CHLOROPHYLL spectra, LIPIDS
Abstract

In our earlier works, we have shown that the rate-limiting steps, associated with the dark-to-light transition of Photosystem II (PSII), reflecting the photochemical activity and structural dynamics of the reaction center complex, depend largely on the lipidic environment of the protein matrix. Using chlorophyll-a fluorescence transients (ChlF) elicited by single-turnover saturating flashes, it was shown that the half-waiting time (Δτ 1/2) between consecutive excitations, at which 50% of the fluorescence increment was reached, was considerably larger in isolated PSII complexes of Thermostichus (T.) vulcanus than in the native thylakoid membrane (TM). Further, it was shown that the addition of a TM lipid extract shortened Δτ1/2 of isolated PSII, indicating that at least a fraction of the 'missing' lipid molecules, replaced by detergent molecules, caused the elongation of Δ τ1/2. Here, we performed systematic experiments to obtain information on the nature of TM lipids that are capable of decreasing Δ τ1/2. Our data show that while all lipid species shorten Δ τ1/2, the negatively charged lipid phosphatidylglycerol appears to be the most efficient species - suggesting its prominent role in determining the structural dynamics of PSII reaction center. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Life style and structure differences between species of freshwater fish

Author

Szűts Viktória, Kelemen-Valkony Ildikó, Ötvös Ferenc, Repas Zoltan, Kovács András, Tóth László, Kiss Attila, Lőrincz Ádám, Szabó Balázs P., Gajdán Krisztina, Kertai Zoltán, Nazanin Houshmand, Szűts Marcella, Obistioiu Diana, Velciov Ariana B., Halasy Katalin, Deim Zoltán, Deák Dalma, Gál József, Csanádi József, and Domonkos Ildikó

Subjects
01.06. Biológiai tudományok, 02.10. Egyéb műszaki tudományok és technológiák
Published
2022

10. Salt Stress Induces Paramylon Accumulation and Fine-Tuning of the Macro-Organization of Thylakoid Membranes in Euglena gracilis Cells

Author

Kanna, Sai Divya, primary, Domonkos, Ildikó, additional, Kóbori, Tímea Ottília, additional, Dergez, Ágnes, additional, Böde, Kinga, additional, Nagyapáti, Sarolta, additional, Zsiros, Ottó, additional, Ünnep, Renáta, additional, Nagy, Gergely, additional, Garab, Gyözö, additional, Szilák, László, additional, Solymosi, Katalin, additional, Kovács, László, additional, and Ughy, Bettina, additional

Published
2021
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11. Supplementary Files: Lipid Polymorphism of the Subchloroplast—Granum and Stroma Thylakoid Membrane–Particles. II. Structure and Functions

Author

Dlouhý, Ondřej, Karlický, Václav, Arshad, Rameez, Zsiros, Ottó, Domonkos, Ildikó, Kurasová, Irena, Wacha, András F., Morosinotto, Tomas, Bóta, Attila, Kouřil, Roman, Špunda, Vladimír, and Garab, Győző

Subjects
nervous system, genetic structures, musculoskeletal, neural, and ocular physiology, macromolecular substances, behavioral disciplines and activities
Abstract

Video S1: Cryo-electron tomography movie of granum TMs, Video S2: Cryo-electron tomography reconstitution movie of granum TMs, Video S3: Cryo-electron tomography movie of stroma TMs, Video S4: Cryo-electron tomography reconstitution movie of stroma TMs.

Published
2021
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13. Lipid Polymorphism of the Subchloroplast—Granum and Stroma Thylakoid Membrane–Particles. II. Structure and Functions

Author

Dlouhý, Ondřej, primary, Karlický, Václav, additional, Arshad, Rameez, additional, Zsiros, Ottó, additional, Domonkos, Ildikó, additional, Kurasová, Irena, additional, Wacha, András F., additional, Morosinotto, Tomas, additional, Bóta, Attila, additional, Kouřil, Roman, additional, Špunda, Vladimír, additional, and Garab, Győző, additional

Published
2021
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19. Timely removal of exogenous cytokinin and the prevention of auxin transport from the shoot to the root affect the regeneration potential of Arabidopsis roots

Author

Bernula, Dóra, primary, Benkő, Péter, additional, Kaszler, Nikolett, additional, Domonkos, Ildikó, additional, Valkai, Ildikó, additional, Szőllősi, Réka, additional, Ferenc, Györgyi, additional, Ayaydin, Ferhan, additional, Fehér, Attila, additional, and Gémes, Katalin, additional

Published
2019
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20. Phosphatidylglycerol is implicated in divisome formation and metabolic processes of cyanobacteria

Author

Kóbori, Tímea O., primary, Uzumaki, Tatsuya, additional, Kis, Mihály, additional, Kovács, László, additional, Domonkos, Ildikó, additional, Itoh, Shigeru, additional, Krynická, Vendula, additional, Kuppusamy, Saravanan G., additional, Zakar, Tomas, additional, Dean, Jason, additional, Szilák, László, additional, Komenda, Josef, additional, Gombos, Zoltán, additional, and Ughy, Bettina, additional

Published
2018
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21. Carotenoids are essential for the assembly of cyanobacterial photosynthetic complexes

Author

Tóth, T.N., Chukhutsina, Volha, Domonkos, Ildikó, Knoppová, Jana, Komenda, Josef, Kis, Mihály, Lénárt, Zsófia, Garab, Gyozo, Kovács, László, Gombos, Zoltán, Van Amerongen, Herbert, Tóth, T.N., Chukhutsina, Volha, Domonkos, Ildikó, Knoppová, Jana, Komenda, Josef, Kis, Mihály, Lénárt, Zsófia, Garab, Gyozo, Kovács, László, Gombos, Zoltán, and Van Amerongen, Herbert

Abstract

In photosynthetic organisms, carotenoids (carotenes and xanthophylls) are important for light harvesting, photoprotection and structural stability of a variety of pigment-protein complexes. Here, we investigated the consequences of altered carotenoid composition for the functional organization of photosynthetic complexes in wild-type and various mutant strains of the cyanobacterium Synechocystis sp. PCC 6803. Although it is generally accepted that xanthophylls do not play a role in cyanobacterial photosynthesis in low-light conditions, we have found that the absence of xanthophylls leads to reduced oligomerization of photosystems I and II. This is remarkable because these complexes do not bind xanthophylls. Oligomerization is even more disturbed in crtH mutant cells, which show limited carotenoid synthesis; in these cells also the phycobilisomes are distorted despite the fact that these extramembranous light-harvesting complexes do not contain carotenoids. The number of phycocyanin rods connected to the phycobilisome core is strongly reduced leading to high amounts of unattached phycocyanin units. In the absence of carotenoids the overall organization of the thylakoid membranes is disturbed: Photosystem II is not formed, photosystem I hardly oligomerizes and the assembly of phycobilisomes remains incomplete. These data underline the importance of carotenoids in the structural and functional organization of the cyanobacterial photosynthetic machinery.

Published
2015

23. Elevated Growth Temperature Can Enhance Photosystem I Trimer Formation and Affects Xanthophyll Biosynthesis in Cyanobacterium Synechocystis sp. PCC6803 Cells

Author

Kłodawska, Kinga, primary, Kovács, László, additional, Várkonyi, Zsuzsanna, additional, Kis, Mihály, additional, Sozer, Özge, additional, Laczkó-Dobos, Hajnalka, additional, Kóbori, Ottilia, additional, Domonkos, Ildikó, additional, Strzałka, Kazimierz, additional, Gombos, Zoltán, additional, and Malec, Przemysław, additional

Published
2014
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