ArticlePlant physiology2022
Rising rates of starch degradation during daytime and trehalose 6-phosphate optimize carbon availability.
Article in Plant physiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed, 39 citations in OpenAlex.
- Systemic and Local Regulation of Root Growth by Vascular Trehalose 6-Phosphate is Correlated With Re-allocation of Primary Metabolites Between Shoots and Roots.Plant, cell & environment · 2026Article
- Article
- Metabolic rewiring and biomass redistribution enable optimized mixotrophic growth in Chlamydomonas.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- The sucrose-trehalose 6-phosphate nexus is conserved in flowering plants with different phloem loading and carbon storage strategies.Journal of experimental botany · 2026Article
- Steady-stateFrontiers in plant science · 2026Article
- Carbon Dioxide Release During Photosynthesis: Connecting Gas Exchange Behavior With Biochemistry.Plant, cell & environment · 2026Review
- Trehalose 6-phosphate - a central regulator at the crossroads of sugar signalling, metabolism, and development.The New phytologist · 2025Review
- Intercellular compartmentation of trehalose 6-phosphate metabolism in Setaria viridis leaves.Journal of experimental botany · 2025Article
- Dynamic regulation of Arabidopsis β-AMYLASE1 by glutathione and thioredoxins affects starch in guard cells.Plant physiology · 2025Article
- The synthesis, degradation and biological function of trehalose- 6-phosphate.Stress biology · 2025Review
- Cytosolic fructose - an underestimated player in the regulation of sucrose biosynthesis.BMC plant biology · 2025Article
- Direct and indirect responses of the Arabidopsis transcriptome to an induced increase in trehalose 6-phosphate.Plant physiology · 2024Article
- Sugar sensing in C4 source leaves: a gap that needs to be filled.Journal of experimental botany · 2024Review
- Stable Isotope Labeling and Quantification of Photosynthetic Metabolites.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Cell wall regulation by carbon allocation and sugar signaling.Cell surface (Amsterdam, Netherlands) · 2023Review
- Assessing the impacts of genetic defects on starch metabolism inJournal of the Royal Society, Interface · 2023Article
- The Inferior Grain Filling Initiation Promotes the Source Strength of Rice Leaves.Rice (New York, N.Y.) · 2023Article
- In vivo protein kinase activity of SnRK1 fluctuates in Arabidopsis rosettes during light-dark cycles.Plant physiology · 2023Article
- Breaking Dawn: The twilight of starch degradation in the light.Plant physiology · 2022Article
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Authors and funding
12 authors at 4 institutions in 4 countries.
Funding
Abstract
Many plants, including Arabidopsis (Arabidopsis thaliana), accumulate starch in the light and remobilize it to support maintenance and growth at night. Starch synthesis and degradation are usually viewed as temporally separate processes. Recently, we reported that starch is also degraded in the light. Degradation rates are generally low early in the day but rise with time. Here, we show that the rate of degradation in the light depends on time relative to dawn rather than dusk. We also show that degradation in the light is inhibited by trehalose 6-phosphate, a signal for sucrose availability. The observed responses of degradation in the light can be simulated by a skeletal model in which the rate of degradation is a function of starch content divided by time remaining until dawn. The fit is improved by extension to include feedback inhibition of starch degradation by trehalose 6-phosphate. We also investigate possible functions of simultaneous starch synthesis and degradation in the light, using empirically parameterized models and experimental approaches. The idea that this cycle buffers growth against falling rates of photosynthesis at twilight is supported by data showing that rates of protein and cell wall synthesis remain high during a simulated dusk twilight. Degradation of starch in the light may also counter over-accumulation of starch in long photoperiods and stabilize signaling around dusk. We conclude that starch degradation in the light is regulated by mechanisms similar to those that operate at night and is important for stabilizing carbon availability and signaling, thus optimizing growth in natural light conditions.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.