Linked Life Data

16657893

Source:http://linkedlifedata.com/resource/pubmed/id/16657893

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2010-6-29
pubmed:abstractText
Crude particulate fractions from wheat leaves (Triticum vulgare L.) were separated on continuous sucrose density gradients, resulting in: broken chloroplasts, a mitochondrial fraction (indicated by cytochrome c oxidase), and microbodies. The visible band of the microbody fraction from adult leaves appears at a buoyant density of 1.25 grams per cm(3) and contains most of the activities of catalase, glycolate oxidase, and hydroxypyruvate reductase on the gradient. In the shoots of freshly soaked seeds, catalase is already highly particulate. During further development in light or in darkness, 40 to 60% of the total activities of catalase and glycolate oxidase and 25 to 40% of the total activity of hydroxypyruvate reductase are always found in the particulate fractions of the leaves. In young developmental stages, the peaks of the activity profiles of the microbody enzymes appear on sucrose gradients at relatively low densities, first between 1.17 to 1.20 grams per cm(3). During development in light, the buoyant density of the microbody fraction shifts to the final value of 1.25 grams per cm(3). However, even after 1 week of growth in the dark, the microbody fraction from etiolated leaves was observed at buoyant densitites 1.17 to 1.24 grams per cm(3) and did not appear as a defined visible band. A characteristic visible microbody band at a buoyant density 1.24 grams per cm(3) was found when the dark-grown seedlings received only three separate 5-minute exposures to white light. A similar peak was also obtained from light-grown leaves in which chloroplast development had been blocked by 3-amino-1,2,4-triazole.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jan
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
33-9
pubmed:dateRevised
2010-9-14
pubmed:year
1972
pubmed:articleTitle
Developmental Studies on Microbodies in Wheat Leaves : II. Ontogeny of Particulate Enzyme Associations.
pubmed:affiliation
Division of Natural Sciences, University of California, Santa Cruz, California 95060.
pubmed:publicationType
Journal Article