Linked Life Data

9283012

Source:http://linkedlifedata.com/resource/pubmed/id/9283012

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1997-12-15
pubmed:abstractText
During development of the intact maize (Zea mays L.) coleoptile a correspondence exists between the rate of change in length and fresh weight but these parameters, that reflect growth, are all preceded by the accumulation of dry weight by the tissue. Coleoptile dry weight increases rapidly for the first 3-4 days commensurate with tissue formation with evidence for specific biosynthesis including the net incorporation into the cell wall of protein and substantial deposition of beta-(1,3)(1,4) glucan. After day 4 the extractable wall protein and after day 5 the beta-(1,3)(1,4) glucan begin to decline while the deposition of glucuronoarabinoxylan continues. Despite the continued incorporation of specific polymers into the wall the accumulated mass does not augment the overall dry weight. The shifts in polysaccharide distribution with development are consistent with what would be expected in terms of changes in the autolytic degradation of the wall. Glucan autolysis in isolated cell walls is relatively inactive initially then increases to a maximum by day 4 while arabinoxylan autolysis undergoes only relatively minor changes. Changes in the extent of wall glucan autolysis is proportional to the levels of glucanase activities extracted from the cell wall during the developmental sequence. Glucan in walls of the first three leaves of the maize seedlings also reflects dynamic turnover in correspondence with growth much like that of the coleoptile, suggesting that glucan metabolism coincides with growth in other maize tissues. The acceleration of glucan turnover mediated by auxin in situ may result from combinations and/or interactions of proteins that promote synergistic polysaccharide hydrolysis.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0141-8130
pubmed:author
pubmed:issnType
Print
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Developmental regulation of polysaccharide metabolism and growth in the primary cell walls of maize.
pubmed:affiliation
Department of Biology, Faculty of Science, Ehime University, Matsuyama, Japan.
pubmed:publicationType
Journal Article, Comparative Study