Sucrose signaling in higher plants. (January 2021)

• Record Type: Journal Article
• Authors: Yoon, Jinmi; Cho, Lae-Hyeon; Tun, Win; Jeon, Jong-Seong; An, Gynheung
• Is Part Of: Plant science. Volume 302(2021)
• Publication Date: 2021-01
• Subjects: Anthocyanin -- Carbohydrate -- Development -- Flowering -- Signaling -- Storage protein -- Sucrose -- Sucrose transporter; Botany -- Periodicals; Botanique -- Périodiques; 580
• DOI: 10.1016/j.plantsci.2020.110703
• Languages: English
• ISSNs: 0168-9452

Abstract

Highlights: Sugars control many developmental and metabolic processes in plants. We critically evaluated whether some of these responses are preferential to sucrose over other sugars like glucose. Sucrose-dependent signaling pathways are summarized. Abstract: Sucrose controls various developmental and metabolic processes in plants. In this review, we evaluate whether sucrose could be a preferred signaling molecule that controls processes like carbohydrate metabolism, accumulation of storage proteins, sucrose transport, anthocyanin accumulation, and floral induction. We summarize putative sucrose-dependent signaling pathways. Sucrose, but not other sugars, stimulates the genes that encode ADP-glucose pyrophosphorylase (AGPase), granule-bound starch synthase I, and UDP-glucose pyrophosphorylase in several species. The class-1 patatin promoter is induced under high sucrose conditions in potato ( Solanum tuberosum ). Exogenous sucrose reduces the loading of sucrose to the phloem by inhibiting the expression of the sucrose transporter and its protein activity in sugar beet ( Beta vulgaris ). Sucrose also influences a wide range of growth processes, including cell division, ribosome synthesis, cotyledon development, far-red light signaling, and tuber development. Floral induction is promoted by sucrose in several species. The molecular mechanisms by which sucrose functions as a signal are largely unknown. Sucrose enhances the expression of transcription factors such as AtWRKY20 and MYB75, which function upstream of the sucrose-responsive genes. Sucrose controls the expression of AtbZIP11 at the post-transcriptional level by the peptide encoded by uORF2 . Sucrose levels affect translation of a group of mRNAs in Arabidopsis. Sucrose increases the activity of AGPase by posttranslational redox-modification. Sucrose interrupts the interaction between sucrose transporter SUT4 and cytochrome b5. In addition, the SNF-related protein kinase-1 appears to be involved in sucrose-dependent pathways by controlling sucrose synthase (SUS4) expression.