The long-term effect of zinc soil contamination on selected free amino acids playing an important role in plant adaptation to stress and senescence
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
24238718
DOI
10.1016/j.ecoenv.2013.10.028
PII: S0147-6513(13)00471-5
Knihovny.cz E-zdroje
- Klíčová slova
- Amino acid, Cytokinins, Plant, Senescence, Toxic element,
- MeSH
- aminokyseliny analýza metabolismus MeSH
- čas MeSH
- cytokininy genetika metabolismus MeSH
- fyziologická adaptace účinky léků MeSH
- geneticky modifikované rostliny genetika metabolismus MeSH
- látky znečišťující půdu toxicita MeSH
- promotorové oblasti (genetika) MeSH
- tabák genetika metabolismus fyziologie MeSH
- zinek toxicita MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- aminokyseliny MeSH
- cytokininy MeSH
- látky znečišťující půdu MeSH
- zinek MeSH
Increased endogenous plant cytokinin (CK) content through transformation with an isopentyl transferase (ipt) gene has been associated with improved plant stress tolerance. The objective of this study is to determine amino acid changes associated with elevated CK production in ipt transgenic tobacco (Nicotiana tabacum L., cv. Wisconsin 38). Nontransformed (WT) and transformed tobacco plants with ipt gene controlled by senescence-activated promoter (SAG) were exposed to zinc soil contamination (tested levels Zn1=250, Zn2=500, Zn3=750 mg kg(-1) soil). The Zn effect on plant stress metabolism resulted in changes in levels of selected free amino acids playing an important role in adaptation to stress and plant senescence (alanine, leucine, proline, methionine and γ-aminobutyrate) and differed for transformed and nontransformed tobacco plants. Analyses of amino acids confirmed that SAG tobacco plants had improved zinc tolerance compared with the WT plants. The enhanced Zn tolerance of SAG plants was associated with the maintenance of accumulation of proline, methionine and γ-aminobutyrate. The concentrations of leucine and alanine did not show significant differences between plant lines.
Citace poskytuje Crossref.org
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