A coordinated switch in sucrose and callose metabolism enables enhanced symplastic unloading in potato tubers.

Autor:	van den Herik B; Computational Developmental Biology, Utrecht University, Utrecht, The Netherlands., Bergonzi S; Plant Breeding, Wageningen University & Research, Wageningen, The Netherlands., Li Y; Plant Breeding, Wageningen University & Research, Wageningen, The Netherlands., Bachem CW; Plant Breeding, Wageningen University & Research, Wageningen, The Netherlands., Ten Tusscher KH; Computational Developmental Biology, Utrecht University, Utrecht, The Netherlands.
Jazyk:	angličtina
Zdroj:	Quantitative plant biology [Quant Plant Biol] 2024 Apr 17; Vol. 5, pp. e4. Date of Electronic Publication: 2024 Apr 17 (Print Publication: 2024).
DOI:	10.1017/qpb.2024.4
Abstrakt:	One of the early changes upon tuber induction is the switch from apoplastic to symplastic unloading. Whether and how this change in unloading mode contributes to sink strength has remained unclear. In addition, developing tubers also change from energy to storage-based sucrose metabolism. Here, we investigated the coordination between changes in unloading mode and sucrose metabolism and their relative role in tuber sink strength by looking into callose and sucrose metabolism gene expression combined with a model of apoplastic and symplastic unloading. Gene expression analysis suggests that callose deposition in tubers is decreased by lower callose synthase expression. Furthermore, changes in callose and sucrose metabolism are strongly correlated, indicating a well-coordinated developmental switch. Modelling indicates that symplastic unloading is not the most efficient unloading mode per se. Instead, it is the concurrent metabolic switch that provides the physiological conditions necessary to potentiate symplastic transport and thereby enhance tuber sink strength . Competing Interests: The authors declare no competing interests. (© The Author(s) 2024.)
Databáze:	MEDLINE
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