Starch Biosynthesis in Rice Endosperm
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چکیده
منابع مشابه
Starch 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 کاملStarch biosynthesis in rice endosperm requires the presence of either starch synthase I or IIIa
Starch synthase (SS) I and IIIa are the first and second largest components of total soluble SS activity, respectively, in developing japonica rice (Oryza sativa L.) endosperm. To elucidate the distinct and overlapping functions of these enzymes, double mutants were created by crossing the ss1 null mutant with the ss3a null mutant. In the F(2) generation, two opaque seed types were found to hav...
متن کاملThe starch-debranching enzymes isoamylase and pullulanase are both involved in amylopectin biosynthesis in rice endosperm
The activities of the two types of starch debranching enzymes, isoamylase and pullulanase, were greatly reduced in endosperms of allelic sugary-1 mutants of rice (Oryza sativa), with the decrease more pronounced for isoamylase than for pullulanase. However, the decrease in isoamylase activity was not related to the magnitude of the sugary phenotype (the proportion of the phytoglycogen region of...
متن کاملOsbZIP58, a basic leucine zipper transcription factor, regulates starch biosynthesis in rice endosperm
Starch composition and the amount in endosperm, both of which contribute dramatically to seed yield, cooking quality, and taste in cereals, are determined by a series of complex biochemical reactions. However, the mechanism regulating starch biosynthesis in cereal seeds is not well understood. This study showed that OsbZIP58, a bZIP transcription factor, is a key transcriptional regulator contr...
متن کاملAmyloplast Membrane Protein SUBSTANDARD STARCH GRAIN6 Controls Starch Grain Size in Rice Endosperm.
Starch is a biologically and commercially important polymer of glucose. Starch is organized into starch grains (SGs) inside amyloplasts. The SG size differs depending on the plant species and is one of the most important factors for industrial applications of starch. There is limited information on genetic factors regulating SG sizes. In this study, we report the rice (Oryza sativa) mutant subs...
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ژورنال
عنوان ژورنال: AGri-Bioscience Monographs
سال: 2014
ISSN: 2186-1447
DOI: 10.5047/agbm.2014.00401.0001