The effect of CCC on the nitrogen compounds content in rape plants and their frost hardiness. Relation to the conditions of day-length and temperature
- 1 January 1972
- journal article
- Published by Institute of Experimental Botany in Biologia plantarum
- Vol. 14 (1) , 39-47
- https://doi.org/10.1007/bf02920900
Abstract
Both CCC and cold (5°C) treatment gave rise to an increased content of the water-soluble proteins in leaf tissue of the winter rape, irrespective of the day length. This effect was accompanied by a decrease of the insoluble nitrogen compounds content, mainly under theLD (the 16 hour day). The applied retardant also stimulated the consumption of the structural compounds induced by low temperature. Low temperature treatment hardened plants more distinctly than the CCC application. The frost hardening effect of CCC andSD (the 8 hour day) was manifested only at 20°C and it disappeared at 5°C. Changes in frost hardiness were not correlated with the changes in the reducing sugar content and in the reducing ability of the studied tissue. The coincident effect of CCC and cold on the reducing sugar content was observed underSD conditions. CCC i nízká teplota (5°C) působily bez ohledu na délku dne vzestup obsahu bílkovin rozpustných ve vodě v listovém pletivu zimní řepky. Tento vzestup byl provázen poklesem obsahu nerozpustných dusíkatých sloučenin, zejména při šestnáctihodinovém dnu. Použitý retardant též stimuloval-spotřebu strukturních sloučenin indukovaných nízkou teplotou. Rostliny se účinněji otužovaly působením nízké teploty než vlivem CCC. Schopnost CCC a krátkého dne (8 h) indukovat vyšší mrazuvzdornost byla patrna jen při 20°C a mizela při 5°C. Změny mrazuvzdornosti nebyly v korelaci se změnami v obsahu redukujících cukrů a se změnami redukční schopnosti sledovaného pletiva. Shodný vliv CCC a chladu na obsah redukujících cukrů byl pozorován při krátkém dnu.Keywords
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