Temperature-dependent formaldehyde metabolism in bean plants. The heat shock response
1989; Elsevier BV; Volume: 59; Issue: 2 Linguagem: Inglês
10.1016/0168-9452(89)90130-1
ISSN1873-2259
AutoresE. Tyihák, Zoltán Király, Gábor Gullner, T. Szarvas,
Tópico(s)Meat and Animal Product Quality
ResumoAbstract A strong correlation exists between the external temperature and the measurable amount of formaldehyde in Pinto bean leaf tissues. The highest amount was detected after the heat shock (HS) treatment of leaves. On the other hand, as a result of HS, the level of some potential formaldehyde generators (trigonelline, choline and N e - trimethyl- l -lysine ) moderately decreased in comparison to the normal room temperature (20°C). In the presence of dimedone the amount of these formaldehyde generators further decreased at all temperatures applied. In one case it was shown that about 4.5% of the radioactivity of Ne-[methyl-3H] trimethyl- l -lysine indeed accumulated in formaldemethone, indicating that N-methylated compounds could be in vivo precursors (generators) of formaldehyde in bean leaf tissues. It is proposed that formaldehyde may play a role in a dynamic demethylation-methylation process that may include also the methylation of heat shock proteins (HSPs).
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