Turgor-dependent Changes in Avena Coleoptile Cell Wall Composition
نویسندگان
چکیده
منابع مشابه
Auxin-induced Changes in Avena Coleoptile Cell Wall Composition.
Sugar and uronic acid residues were derived from wall polysaccharides of oat (Avena sativa, var. Victory) coleoptiles by means of 2 N trifluoroacetic acid, 72% sulfuric acid, or enzymic hydrolysis. The products of hydrolysis were reduced and acetylated to form alditol acetates which were analyzed using gas chromatography. Time-course studies of auxin-promoted changes in various wall fractions i...
متن کاملAuxin-induced changes in the molecular weight of hemicellulosic polysaccharides of the Avena coleoptile cell wall
The average molecular weight of the water soluble hemicelluloses (hemicellulose B) of the Avena coleoptile cell wall was determined by gel permeation chromatography (GPC) and viscometry. Analysis of the neutral sugar composition of henucellulose B eluted from a GPC column (Sepharose 4B) indicated that it consists of /J-glucan with a high molecular weight and arabinoxylan with a low molecular we...
متن کاملActivation of Avena coleoptile cell wall glycosidases by hydrogen ions and auxin.
Several cell wall-bound glycosidases present in Avena sativa coleoptiles were assayed by following the hydrolysis of p-nitrophenyl-glycosides. Particular emphasis was placed on characterizing some parameters affecting the activity of beta-galactosidase. The pH optimum of this enzyme is 4.5 to 5.5; it is sensitive to copper ions and p-chloromercuribenzoate treatment and apparently has an excepti...
متن کاملInhibition of cell elongation in Avena coleoptile by hydroxyproline.
A study has been made of the hydroxyproline-induced inhibition of elongation of Avena coleoptile tissues. The isomers of 4-hydroxyproline differ in their effectiveness; only the L isomers are growth inhibitors with the cis form (allohydroxyproline) being more effective than the trans form (hydroxyproline). Hydroxyproline differs from other amino acid antagonists and protein synthesis inhibitors...
متن کاملEffect of Peroxyacetyl Nitrate on Growth & Cell Wall Metabolism of Avena Coleoptile Sections.
It was reported earlier (12) that growth of Avena coleoptile sections was inhibited by pretreatment of tissue with photochemically derived oxidants, including peroxyacetyl nitrate (PAN), a naturally occurring air pollutant. Other workers (3,6, 15) showed that cell expansion is dependent on plasticization of the cell wall. Various studies (1, 8,9,10, 11) indicate that metabolism of cell wall con...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1973
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.52.3.248