Genic Mutations Affecting Endosperm Starch in Rice.
نویسندگان
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 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...
متن کاملAmyloplast-localized SUBSTANDARD STARCH GRAIN4 protein influences the size of starch grains in rice endosperm.
Starch is a biologically and commercially important polymer of glucose and is synthesized to form starch grains (SGs) inside amyloplasts. Cereal endosperm accumulates starch to levels that are more than 90% of the total weight, and most of the intracellular space is occupied by SGs. The size of SGs differs depending on the plant species and is one of the most important factors for industrial ap...
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...
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ژورنال
عنوان ژورنال: Journal of the agricultural chemical society of Japan
سال: 1994
ISSN: 0002-1407,1883-6844
DOI: 10.1271/nogeikagaku1924.68.1577