opaque-15, a maize mutation with properties of a defective opaque-2 modifier.
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چکیده
منابع مشابه
opaque-15, a maize mutation with properties of a defective opaque-2 modifier.
An opaque mutation was identified that reduces gamma-zein synthesis in maize endosperm. The mutation, opaque-15, causes a 2- to 3-fold reduction in gamma-zein mRNA and protein synthesis and reduces the proportion of the 27-kDa gamma-zein A gene transcript. Although the protein bodies in opaque-15 are similar in size and morphology compared to wild type, there are fewer of them in developing end...
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Lysine-ketoglutarate reductase catalyzes the first step of lysine catabolism in maize (Zea mays L.) endosperm. The enzyme condenses L-lysine and a-ketoglutarate into saccharopine using NADPH as cofactor. It is endosperm-specific and has a temporal pattern of activity, increasing with the onset of kernel development, reaching a peak 20 to 25 days after pollination, and thereafter decreasing as t...
متن کاملThe opaque-2 mutation of maize differentially reduces zein gene transcription.
Zeins, the storage proteins of maize seed, are encoded by a large multigene family that is regulated developmentally and expressed in a tissue-specific manner during endosperm development. The synthesis of these proteins is affected by mutations, such as opaque-2, that cause a reduction in the accumulation of zein proteins and mRNAs. We used nuclear run-on transcription assays to analyze the ex...
متن کاملKernel composition, starch structure, and enzyme digestibility of opaque-2 maize and quality protein maize.
Objectives of this study were to understand how opaque-2 (o2) mutation and quality protein maize (QPM) affect maize kernel composition and starch structure, property, and enzyme digestibility. Kernels of o2 maize contained less protein (9.6-12.5%) than those of the wild-type (WT) counterparts (12.7-13.3%). Kernels of a severe o2 mutant B46o2 also contained less starch (66.9%) than those of B46w...
متن کاملChemical composition and nutritional properties of a sugary-1/opaque-2 (su1/o2) variety of maize (Zea mays L.).
While the data of Table I11 indicate that Brazil nut protein does supplement bean protein, the quantitative estimate of the supplementation effect varies with the measure used for protein evaluation. Specifically, the amino acid scores drop faster than the protein efficiency ratios or the microbiological values, as the protein quality of the diet diminishes. A possible explanation of these diff...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1995
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.92.6.1931