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    Characterization of Two-Component System gene (TCS) in melatonin-treated common bean under salt and drought stress
    (Springer, 2023) Kasapoglu, Ayse Gul; Ilhan, Emre; Aydin, Murat; Yigider, Esma; Inal, Behcet; Buyuk, Ilker; Taspinar, Mahmut Sinan
    The two-component system (TCS) generally consists of three elements, namely the histidine kinase (HK), response regulator (RR), and histidine phosphotransfer (HP) gene families. This study aimed to assess the expression of TCS genes in P. vulgaris leaf tissue under salt and drought stress and perform a genome-wide analysis of TCS gene family members using bioinformatics methods. This study identified 67 PvTCS genes, including 10 PvHP, 38 PvRR, and 19 PvHK, in the bean genome. PvHK2 had the maximum number of amino acids with 1261, whilst PvHP8 had the lowest number with 87. In addition, their theoretical isoelectric points were between 4.56 (PvHP8) and 9.15 (PvPRR10). The majority of PvTCS genes are unstable. Phylogenetic analysis of TCS genes in A. thaliana, G. max, and bean found that PvTCS genes had close phylogenetic relationships with the genes of other plants. Segmental and tandem duplicate gene pairs were detected among the TCS genes and TCS genes have been subjected to purifying selection pressure in the evolutionary process. Furthermore, the TCS gene family, which has an important role in abiotic stress and hormonal responses in plants, was characterized for the first time in beans, and its expression of TCS genes in bean leaves under salt and drought stress was established using RNAseq and qRT-PCR analyses. The findings of this study will aid future functional and genomic studies by providing essential information about the members of the TCS gene family in beans.
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    Electron paramagnetic resonance characterization of gamma irradiation damage centers in powder of L-(+)-tartaric acid, N-acetyl-L-alanine and 1-methyl-L-histidine
    (Taylor & Francis Ltd, 2010) Baskan, M. Halim; Aydin, Murat; Osmanoglu, Semsettin; Topkaya, Ramazan
    The electron paramagnetic resonance (EPR) of -irradiated powders of l-(+)-tartaric acid, N-acetyl-l-alanine and 1-methyl-l-histidine were investigated at room temperature. Radiation damage centers are attributed to HOOCCH(OH)C(OH)COOH, CH3CHCOOH and -CH2CHCOOH radicals. The spectra were computer-simulated. Hyperfine structure constants and g-values were determined for these three radicals. The unirradiated samples showed no EPR signal. Some spectroscopic properties and suggestions concerning the possible structure of the radicals are discussed in this paper.
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    Öğe
    Radiation damage produced in single crystal of iminodiacetic acid hydrobromide
    (2010) Aydin, Murat; Osmano?lu, Şemsettin; Halim Başkan, M.; Yeşim Dicle, I.
    Single crystals of iminodiacetic acid hydrobromide, H2N(CH2COOH)2·Br, were gamma-irradiated and the formed paramagnetic species were investigated at room temperature and analyzed for different orientations of the crystal in the magnetic field by electron paramagnetic resonance technique. The observed species in iminodiacetic acid hydrobromide single crystals were attributed to the H2N?HCH2(COOH)2·Br radical. The g values and hyperfine coupling constants of the unpaired electron with the environmental ?-proton, methylene protons, and one proton of the NH2, and 14N nucleus were determined. The results were found to be in good agreement with the existing literature data. © 2010 Elsevier B.V. All rights reserved.