Linked Life Data

16666063

Source:http://linkedlifedata.com/resource/pubmed/id/16666063

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-6-29
pubmed:abstractText
Bundle sheath cells from leaves of a variety of C(4) species contained little or no carbonic anhydrase activity. The proportion of total leaf carbonic anhydrase in extracts of bundle sheath cells closely reflected the apparent mesophyll cell contamination of bundle sheath cell extracts as measured by the proportion of the mesophyll cell marker enzymes phosphoenolpyruvate carboxylase and pyruvate,Pi dikinase. Values of about 1% or less of the total leaf activity were obtained for all three enzymes. The recorded bundle sheath carbonic anhydrase activity was compared with a calculated upper limit of carbonic anhydrase activity that would still permit efficient functioning of the C(4) pathway; that is, a carbonic anhydrase level allowing a sufficiently high steady state [CO(2)] to suppress photorespiration. Even before correcting for mesophyll cell contamination the activity in bundle sheath cell extracts was substantially less than the calculated upper limit of carbonic anhydrase activity consistent with effective C(4) function. The results accord with the notion that a deficiency of carbonic anhydrase in bundle sheath cells is vital for the efficient operation of the C(4) pathway.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Apr
pubmed:issn
0032-0889
pubmed:author
pubmed:issnType
Print
pubmed:volume
86
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1252-6
pubmed:dateRevised
2010-9-15
pubmed:year
1988
pubmed:articleTitle
Low bundle sheath carbonic anhydrase is apparently essential for effective c(4) pathway operation.
pubmed:affiliation
CSIRO, Division of Plant Industry, GPO Box 1600, Canberra City A.C.T. 2601, Australia.
pubmed:publicationType
Journal Article