Regulation of sucrose-phosphate synthase in wheat (Triticum aestivum) leaves

Functional Plant Biology : FPB
S TrevanionJohn E Lunn

Abstract

The regulation of sucrose-phosphate synthase (SPS, E.C. 2.4.1.14), a key enzyme of sucrose synthesis, was investigated in wheat (Triticum aestivum L.) leaves. Wheat SPS was activated in the light, with an increased affinity for its substrates and the activator glucose-6-phosphate, reduced sensitivity to inhibition by Pi, but no change in maximum catalytic activity. Based on these properties, assays to measure the total activity and activation state of the enzyme were established and validated using several different wheat cultivars, grown under different environmental conditions. As found in previous studies on other species, e.g. spinach, activation appeared to be linked to the prevailing rate of photosynthesis rather than light per se. Long-term exposure to higher light levels increased total SPS activity in the leaves, and some experiments indicated that this response could occur within 1 h of exposure of low-light-grown plants to high light. However, activation of pre-existing enzyme was a more common short-term response to high light. Wheat, like many important cereal species, stores a large amount of sucrose in its leaves. In contrast with spinach, which stores more starch in its leaves, accumulation of sucrose in wheat l...Continue Reading

References

Oct 12, 2000·Plant Physiology·A T Chávez-BárcenasL Herrera-Estrella
May 20, 2003·Current Opinion in Plant Biology·John E Lunn, Elspeth MacRae
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·Steven C. Huber, Joan L. Huber
Sep 1, 1984·Plant Physiology·R C SicherW G Harris

❮ Previous
Next ❯

Citations

Sep 6, 2018·Plant, Cell & Environment·Anna FlisMark Stitt
Mar 1, 2020·Ecological Applications : a Publication of the Ecological Society of America·Zihe ZhangWei Zhang
Nov 1, 2005·Functional Plant Biology : FPB·Dorthe VilladsenTom Hamborg Nielsen
Apr 23, 2010·The Plant Journal : for Cell and Molecular Biology·Mark StittBjörn Usadel
Mar 22, 2014·The Plant Journal : for Cell and Molecular Biology·John Edward LunnMark Stitt
Dec 31, 2015·The Plant Journal : for Cell and Molecular Biology·Carlos M FigueroaJohn E Lunn
Nov 14, 2008·Functional & Integrative Genomics·Pierre-Etienne SadoLuc Saulnier
Jul 5, 2017·Journal of Experimental Botany·Maria Grazia AnnunziataChristine Raines
Feb 5, 2009·Annals of Botany·Graham N ScofieldColin L D Jenkins
Aug 2, 2005·Plant Physiology·Yan LuThomas D Sharkey

❮ Previous
Next ❯

Methods Mentioned

BETA
transgenic

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.