Glutamine synthetase and glutamate dehydrogenase in triticale seeds: molecular cloning and genes expression

• Autorzy: Grabowska A. , Kwinta J. , Bielawski W.
• Języki publikacji: EN

Abstrakty

EN

In higher plants, glutamine synthetase (GS; EC 6.3.1.2) and glutamate dehydrogenase (GDH; EC 1.4.1.2) are the predominant enzymes in nitrogen metabolism. In this study, we cloned both the GS and GDH genes and analyzed their expression levels and variations in their activity in developing and germinating x Triticosecale (cv. Witon) kernels. The developing kernel samples were collected 3, 5, 7, 9, 13, 15, 20, 25, 30, 35, 40 and 45 days after flowering (DAF). The germinating kernel samples were collected after 8, 16, 24, 48 and 72 h of imbibition. There are two GS isoforms that are localized to different compartments: the cytosol (GS1) and the chloroplast (GS2). Five cDNAs encoding GS proteins in triticale plants were obtained using RT-PCR. We cloned the four genes encoding GS1, which we designated TsGS1-1, TsGS1-2, TsGS1-3 and TsGS1-4 and the only gene encoding GS2, which was designated TsGS2-1. We studied the changes in the enzymatic activity and the expression profiles of the GDH, GS1 and GS2 genes in both the developing and germinating seeds of triticale. Based on our results, there is likely cooperation between GDH and GS1 in the synthesis of glutamine and glutamate during the early stages of seed formation and in the scutella of kernels for up to 24 h of imbibition.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 6
• Opis fizyczny: p.2393-2406,fig.,ref.

Twórcy

autor

Grabowska A.

• Department of Biochemistry, Faculty of Agriculture and Biology, Warsaw University of Life Science, 159 Nowoursynowska St., 02-776 Warsaw, Poland

autor

Kwinta J.

• Department of Biochemistry, Faculty of Agriculture and Biology, Warsaw University of Life Science, 159 Nowoursynowska St., 02-776 Warsaw, Poland

autor

Bielawski W.

• Department of Biochemistry, Faculty of Agriculture and Biology, Warsaw University of Life Science, 159 Nowoursynowska St., 02-776 Warsaw, Poland

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