منابع مشابه
Starch biosynthesis.
Starch is the most significant form of carbon reserve in plants in terms of the amount made, the universality of its distribution among different plant species, and its commercial importance. It consists of different glucose polymers arranged into a threedimensional, semicrystalline structure-the starch granule. The biosynthesis of starch involves not only the production of the composite glucan...
متن کاملStarch Biosynthesis in Rice Endosperm
© 2014 TERRAPUB, Tokyo. All rights reserved. doi:10.5047/agbm.2014.00401.0001 water (Fig. 1) or treating it with alkaline, urea, or dimethyl sulfoxide through the cutting of hydrogen bonds between the starch molecules. It is thought that digestion of hydrogen bonds results in the unwinding of the double helices of parallel α-1,4 glucan chains in the crystal lamellae of amylopectin molecules. Th...
متن کاملBiosynthesis of starch in chloroplasts.
The enzymic synthesis of ADP-glucose and UDP-glucose by chloroplastic pyrophosphorylase of bean and rice leaves has been demonstrated by paper chromatographic techniques. In both tissues, the activity of UDP-glucose-pyrophosphorylase was much higher than ADP-glucose-pyrophosphorylase. Glycerate-3-phosphate, phosphoenolpyruvate and fructose-1,6-diphosphate did not stimulate ADP-glucose formation...
متن کاملStarch biosynthesis, its regulation and biotechnological approaches to improve crop yields.
Structurally composed of the glucose homopolymers amylose and amylopectin, starch is the main storage carbohydrate in vascular plants, and is synthesized in the plastids of both photosynthetic and non-photosynthetic cells. Its abundance as a naturally occurring organic compound is surpassed only by cellulose, and represents both a cornerstone for human and animal nutrition and a feedstock for m...
متن کامل1 Starch Biosynthesis in Relation to Resistant Starch
Starch is present in amyloplasts as semi-crystalline intracellular waterinsoluble granules, with alternating crystalline and amorphous layers. Starch is a glucan homopolymer composed of one-quarter amylose (molecular mass 10–10Da) and three-quarters amylopectin (molecular mass 10–10Da), along with traces of lipids (0.1–1.0%) and proteins (0.05–0.5%). Amylose is essentially a linear glucan polym...
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ژورنال
عنوان ژورنال: Agronomy
سال: 2018
ISSN: 2073-4395
DOI: 10.3390/agronomy8060081