Abstract
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1)
At a so-called natural anaerobiosis during the first 48 hours of germination the concentration of ethanol in pea tissues increases (according to the cultivation conditions) up to 40 μmol per gram fresh weight.
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2)
In a nitrogen atmosphere the content of ethanol in pea seedlings increases as well, and after a 90 hour incubation in N2 it can reach even 100 μmol ethanol per gram fresh weight. In older plants the content increases the most markedly in cotyledons, but considerable amounts were revealed also in stems and roots. Its increase in vegetative organs of plants cultivated both in light and darkness is more or less identical. Ethylalcohol can be formed by the vegetative organs themselves, as proved by the increase of this metabolite in plants deprived of reserve organs; in addition, however, it is evidently transported into them from reserve parts. Ethanol formed under anaerobiosis is catabolyzed after transferring plants to the air.
Abstract
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1.
Za tzv. přirozené anaerobiosy během prvých 48 hodin klíčení stoupne koncentrace ethanolu (podle podmínek, za kterých jsou rostliny pěstovány) v pletivech hrachu až na 40 μmolů na gram čerstvé váhy.
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2.
Rovněž v atmosféře dusíku stoupá obsah ethanolu v klíčících semenech hrachu a může např. po 90hodinové inkubaci v N2 dosáhnout dokonce 100 μmolů ethanolu na gram čerstvé váhy. U rostlin starších stoupá obsah nejvýrazněji v dělohách, ale značně také v osách a kořenech. Vzestup ve vegetativních orgánech rostlin pěstovaných na světle i ve tmě je víceméně shodný. Vegetativní orgány mohou ethanol samy tvořit, jak dokazuje vzestup tohoto metabolitu u rostlin zbavených reservních orgánů, vedle toho však je do nich zřejmě také transpotován z reservních částí. Ethanol vytvořený za anerobiosy se po přenesení rostlin na vzduch odbourává.
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Leblová, S., Zimáková, I., Sofrová, D. et al. Occurrence of ethanol in pea plants in the course of growth under normal and anaerobic conditions. Biol Plant 11, 417–423 (1969). https://doi.org/10.1007/BF02920705
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DOI: https://doi.org/10.1007/BF02920705