A temperature regime that disrupts clock-controlled starch mobilization induces transient carbohydrate starvation, resulting in compact growth.

Autor:	van Hoogdalem M; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands.; Current Business Unit Greenhouse Horticulture, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands., Shapulatov U; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands.; Current Department of Botany and Plant Physiology, National University of Uzbekistan, Tashkent, Uzbekistan., Sergeeva L; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands., Busscher-Lange J; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands.; Business Unit Bioscience, Wageningen Plant Research, Droevendaalsesteeg, Wageningen, The Netherlands., Schreuder M; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands., Jamar D; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands., van der Krol AR; Laboratory of Plant Physiology, Wageningen University & Research, Droevendaalsesteeg, Wageningen, The Netherlands.
Jazyk:	angličtina
Zdroj:	Journal of experimental botany [J Exp Bot] 2021 Feb 22. Date of Electronic Publication: 2021 Feb 22.
DOI:	10.1093/jxb/erab075
Abstrakt:	In nature plants are usually subjected to a light/temperature regime of warm day and cold night (referred to as +DIF). Compared to growth under +DIF, Arabidopsis plants show compact growth under the same photoperiod, but with an inverse temperature regime (cold day and warm night: -DIF). Here we show that -DIF differentially affects the phase and amplitude of core clock gene expression. Under -DIF the phase of the morning clock gene CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) is delayed, similar to that of plants grown on low sucrose. Indeed, under -DIF carbohydrate (CHO) starvation marker genes are specifically upregulated at the End of the Night (EN) in Arabidopsis rosettes. However, only in inner-rosette tissue (small sink leaves and petioles of older leaves) sucrose levels are lower under -DIF compared to under +DIF, suggesting that sucrose in source leaf blades is not sensed for CHO status and that sucrose transport from source to sink may be impaired at EN. CHO-starvation under -DIF correlated with increased starch breakdown during the night and decreased starch accumulation during the day. Moreover, we demonstrate that different ways of inducing CHO-starvation all link to reduced growth of sink leaves. Practical implications for control of plant growth in horticulture are discussed. (© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
Databáze:	MEDLINE
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