Starch synthesis in developing pea embryos
نویسندگان
چکیده
منابع مشابه
Mutations in the gene encoding starch synthase II profoundly alter amylopectin structure in pea embryos.
Mutations at the rug5 (rugosus5) locus have been used to elucidate the role of the major soluble isoform of starch synthase II (SSII) in amylopectin synthesis in the developing pea embryo. The SSII gene maps to the rug5 locus, and the gene in one of three rug5 mutant lines has been shown to carry a base pair substitution that introduces a stop codon into the open reading frame. All three mutant...
متن کاملPea starch, a starch of high amylose content.
Two general classes of starch have been recognized up to the present time, the common starches, containing both amylose and amylopectin molecules, and the waxy or glutinous cereal starches, which are comprised almost entirely of amylopectin. The first class can, in turn, be subdivided into two broad groups, one composed of the so called root starches, such as t’apioca, potato, a,nd sweet potato...
متن کاملProperties of Citrate-stimulated Starch Synthesis Catalyzed by Starch Synthase I of Developing Maize Kernels.
Chromatography of extracts of maize on diethylaminoethyl-cellulose resolves starch synthase activity into two fractions (Ozbun, Hawker, Preiss 1971 Plant Physiol 48: 785-769). Only starch synthase I is capable of synthesis in the absence of added primer and the presence of 0.5 molar citrate. This enzyme fraction has been purified about 1,000-fold from maize kernels homozygous for the endosperm ...
متن کاملSynthesis and Interconversion of Amino Acids in Developing Cotyledons of Pea (Pisum sativum L.).
Freshly isolated cotyledons from 10-day developing pea (Pisum sativum) seeds were fed radiolabeled precursors for 5 hours, and the specific radioactivity of the free and total protein amino acids was determined using a dansylation procedure. When the seven most abundant amino acids in phloem exudate of pea fruits (asparagine, serine, glutamine, homoserine, alanine, aspartate, glycine) were fed ...
متن کاملSterol and triterpene synthesis in the developing and germinating pea seed.
Developing and germinating pea seeds were compared with respect to their capacity to incorporate mevalonate into sterols and triterpenes. The capacity for sterol synthesis is greatest in the least mature fruits and decreases during their development. Label is shown, by gas-liquid chromatography and counting the radioactivity of trapped fractions, to be associated with campesterol, beta-sitoster...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Phytologist
سال: 1992
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1992.tb00049.x