Trehalose 6-phosphate (Tre6P) has a dual function as a signal and homeostatic regulator of sucrose levels in plants. In source leaves, Tre6P regulates the production of sucrose to balance supply with demand for sucrose from growing sink organs. As a signal of sucrose availability, Tre6P influences developmental decisions that will affect future demand for sucrose, such as flowering, embryogenesis, and shoot branching, and links the growth of sink organs to sucrose supply. This involves complex interactions with SUCROSE-NON-FERMENTING1-RELATED KINASE1 that are not yet fully understood. Tre6P synthase, the enzyme that makes Tre6P, plays a key role in the nexus between sucrose and Tre6P, operating in the phloem-loading zone of leaves and potentially generating systemic signals for source-sink coordination. Many plants have large and diverse families of Tre6P phosphatase enzymes that dephosphorylate Tre6P, some of which have noncatalytic functions in plant development. Expected final online publication date for the Annual Review of Plant Biology, Volume 72 is May 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

中文翻译：

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6-磷酸海藻糖 (Tre6P) 在植物代谢和发育中的作用

6-磷酸海藻糖 (Tre6P) 作为植物中蔗糖水平的信号和稳态调节剂具有双重功能。在源叶中，Tre6P 调节蔗糖的产生，以平衡生长的汇器官对蔗糖的需求。作为蔗糖可用性的信号，Tre6P 影响发育决策，这些决策将影响未来对蔗糖的需求，例如开花、胚胎发生和枝条分枝，并将汇器官的生长与蔗糖供应联系起来。这涉及与尚未完全了解的 SUCROSE-NON-FERMENTING1-RELATED KINASE1 的复杂相互作用。Tre6P 合酶，即制造 Tre6P 的酶，在蔗糖和 Tre6P 之间的联系中起着关键作用，在叶子的韧皮部加载区运行，并可能产生源库协调的系统信号。许多植物具有大量多样的 Tre6P 磷酸酶家族，可将 Tre6P 去磷酸化，其中一些在植物发育中具有非催化功能。《植物生物学年度评论》第 72 卷的预计最终在线出版日期是 2021 年 5 月。请参阅 http://www.annualreviews.org/page/journal/pubdates 了解修订后的估计值。