The DOI matches its Crossref record; 173 of the 173 references it cites were found in a registry or an index.
The diurnal metabolism of leaf starch
Abstract
Starch is a primary product of photosynthesis in leaves. In most plants, a large fraction of the carbon assimilated during the day is stored transiently in the chloroplast as starch for use during the subsequent night. Photosynthetic partitioning into starch is finely regulated, and the amount of carbohydrate stored is dependent on the environmental conditions, particularly day length. This regulation is applied at several levels to control the flux of carbon from the Calvin cycle into starch biosynthesis. Starch is composed primarily of branched glucans with an architecture that allows the formation of a semi-crystalline insoluble granule. Biosynthesis has been most intensively studied in non-photosynthetic starch-storing organs, such as developing seeds and tubers. Biosynthesis in leaves has received less attention, but recent reverse-genetic studies of Arabidopsis (thale cress) have produced data generally consistent with what is known for storage tissues. The pathway involves starch synthases, which elongate the glucan chains, and branching enzymes. Remarkably, enzymes that partially debranch glucans are also required for normal amylopectin synthesis. In the last decade, our understanding of starch breakdown in leaves has advanced considerably. Starch is hydrolysed to maltose and glucose at night via a pathway that requires recently discovered proteins in addition to well-known enzymes. These sugars are exported from the plastid to support sucrose synthesis, respiration and growth. In the present review we provide an overview of starch biosynthesis, starch structure and starch degradation in the leaves of plants. We focus on recent advances in each area and highlight outstanding questions.
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Orchestrated Transcription of Key Pathways in Arabidopsis by the Circadian Clock
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From Bacterial Glycogen to Starch: Understanding the Biogenesis of the Plant Starch Granule
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Recent Progress toward Understanding Biosynthesis of the Amylopectin Crystal
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Cited by
Starch: its metabolism, evolution, and biotechnological modification in plants
Zeeman, S. C., Kossmann, J., & Smith, A. M. (2010) · Annual Review of Plant Biology · doi:10.1146/annurev-arplant-042809-112301 · Cited by 1,095
Self-citationGlycogen and its metabolism: some new developments and old themes
Roach, P. J., Depaoli-Roach, A. A., Hurley, T. D., & Tagliabracci, V. S. (2012) · Biochemical Journal · doi:10.1042/bj20111416 · Cited by 709
Arabidopsis and primary photosynthetic metabolism – more than the icing on the cake
Stitt, M., Lunn, J., & Usadel, B. (2010) · The Plant Journal · doi:10.1111/j.1365-313x.2010.04142.x · Cited by 349
GIBON, Y., PYL, E., SULPICE, R., LUNN, J. E., HÖHNE, M., GÜNTHER, M., & STITT, M. (2009) · Plant, Cell & Environment · doi:10.1111/j.1365-3040.2009.01965.x · Cited by 334
Hexose kinases and their role in sugar-sensing and plant development
Granot, D., David-Schwartz, R., & Kelly, G. (2013) · Frontiers in Plant Science · doi:10.3389/fpls.2013.00044 · Cited by 260
Metadata
- Authors
- Zeeman, S. C., Smith, S. M., & Smith, A. M.
- Venue
- Biochemical Journal
- Publisher
- Portland Press Ltd.
- Published
- 2006-12-11
- Volume
- 401
- Issue
- 1
- Pages
- 13-28
- ISSN
- 0264-6021 (ISSN-L)
- 1470-8728
- OpenAlex
- W2047584139
- Cited by
- 443
- References
- 173
- FWCI
- 6.88
- Type
- journal article
- Language
- en
- Open access
- closed
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