Linked Life Data

16662641

Source:http://linkedlifedata.com/resource/pubmed/id/16662641

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-6-29
pubmed:abstractText
Guard cell pairs were dissected from freeze-dried leaves of plants representing 15 families, including monocots, dicots, and pteridophytes. All three major photosynthetic carbon pathways (C(2), C(4), and Crassulacean acid metabolism) were represented. These individual guard cell pairs were assayed quantitatively for ribulose-1,5-bisphosphate carboxylase specific activity. Assay sensitivity averaged 0.08 picomoles of ribulose-P(2) dependent P-glycerate formation (i.e. 100-fold more sensitive than required to detect the activity present in a single Vicia faba mesophyll cell). The calculated specific activities for guard cells and mesophyll cells averaged 4 and 472 millimoles per kilogram dry weight per hour, respectively. For all species surveyed, (a) the enzyme activity calculated for guard cells was below the detection limit of the assay, or (b) the specific activity (weight or cell basis) calculated for guard cells was less than 1% of the specific activity calculated for adjacent mesophyll cells. Based on this survey, the generalization is made that the photosynthetic carbon reduction pathway is absent, or virtually so, in guard cell chloroplasts.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
70
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1218-20
pubmed:dateRevised
2010-9-15
pubmed:year
1982
pubmed:articleTitle
Taxonomic survey for the presence of ribulose-1,5-bisphosphate carboxylase activity in guard cells.
pubmed:affiliation
Department of Biological Science (Unit I), Florida State University, Tallahassee, Florida 32306.
pubmed:publicationType
Journal Article