Inhibition of the expression of the starch synthase II gene leads to lower pasting temperature in sweetpotato starch

Plant Cell Reports
Yasuhiro TakahataMasaru Yoshinaga


The sweetpotato cultivar Quick Sweet (QS) with a lower pasting temperature of starch is a unique breeding material, but the biochemical background of this property has been unknown. To assess the physiological impact of the reduced isoform II activity of starch synthase (SSII) on the starch properties in sweetpotato storage root, transgenic sweetpotato plants with reduced expressions of the SSII gene were generated and evaluated. All of the starches from transgenic plants showed lower pasting temperatures and breakdown measured by a Rapid Visco Analyzer. The pasting temperatures in transgenic plants were approximately 10-15 degrees C lower than in wild-type plants. Distribution of the amylopectin chain length of the transgenic lines showed marked differences compared to that in wild-type plants: more chains with degree of polymerization (DP) 6-11 and fewer chains with DP 13-25. The starch granules from the storage root of transgenic plants showed cracking on the hilum, while those from wild-type plants appeared to be typical sweetpotato starch. In accordance with these observations, the expression of SSII in the storage roots of the sweetpotato cultivar with low pasting temperature starch (QS) was notably lower than in cultivar...Continue Reading


Oct 25, 1988·Nucleic Acids Research·R Höfgen, L Willmitzer
Feb 19, 2002·Modern Pathology : an Official Journal of the United States and Canadian Academy of Pathology, Inc·Katleen De PreterJo Vandesompele
Feb 13, 2003·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·T UmemotoYasunori Nakamura
Apr 16, 2003·The Plant Journal : for Cell and Molecular Biology·Matthew K MorellZhongyi Li
Feb 11, 2005·Journal of Plant Physiology·Masaru TanakaMakoto Nakatani
Sep 30, 2005·Journal of Agricultural and Food Chemistry·Da-Gin Lin, Chii-Ling Jeang
May 10, 2007·Molecular Biology and Evolution·Koichiro TamuraSudhir Kumar
Jan 1, 1998·Bioscience, Biotechnology, and Biochemistry·Kanefumi KitaharaT Suganuma
Aug 1, 2004·Functional Plant Biology : FPB·Takayuki UmemotoSachio Maruyama


Feb 27, 2016·Plant Physiology and Biochemistry : PPB·Zhihui GuanWenquan Wang
Mar 26, 2015·DNA Research : an International Journal for Rapid Publication of Reports on Genes and Genomes·Hideki HirakawaSachiko N Isobe
Jun 15, 2016·International Journal of Biological Macromolecules·Ghazal PeymanpourEric Bertoft
May 4, 2017·Breeding Science·Kanefumi KitaharaYasuhiro Takahata
Aug 27, 2016·Zeitschrift Für Naturforschung. C, a Journal of Biosciences·Muhammad Zubair KhanNorihiko Misawa
Mar 8, 2021·Current Opinion in Plant Biology·Jiawen ChenDavid Seung

Related Concepts

Trending Feeds


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.

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.

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.

Hereditary Sensory Autonomic Neuropathy

Hereditary Sensory Autonomic Neuropathies are a group of inherited neurodegenerative disorders characterized clinically by loss of sensation and autonomic dysfunction. Here is the latest research on these neuropathies.

Spatio-Temporal Regulation of DNA Repair

DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.

Glut1 Deficiency

Glut1 deficiency, an autosomal dominant, genetic metabolic disorder associated with a deficiency of GLUT1, the protein that transports glucose across the blood brain barrier, is characterized by mental and motor developmental delays and infantile seizures. Follow the latest research on Glut1 deficiency with this feed.

Separation Anxiety

Separation anxiety is a type of anxiety disorder that involves excessive distress and anxiety with separation. This may include separation from places or people to which they have a strong emotional connection with. It often affects children more than adults. Here is the latest research on separation anxiety.

KIF1A Associated Neurological Disorder

KIF1A associated neurological disorder (KAND) is a rare neurodegenerative condition caused by mutations in the KIF1A gene. KAND may present with a wide range and severity of symptoms including stiff or weak leg muscles, low muscle tone, a lack of muscle coordination and balance, and intellectual disability. Find the latest research on KAND here.

Regulation of Vocal-Motor Plasticity

Dopaminergic projections to the basal ganglia and nucleus accumbens shape the learning and plasticity of motivated behaviors across species including the regulation of vocal-motor plasticity and performance in songbirds. Discover the latest research on the regulation of vocal-motor plasticity here.