Linked Life Data

16662607

Source:http://linkedlifedata.com/resource/pubmed/id/16662607

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-6-29
pubmed:abstractText
Chloroplasts isolated from seedlings of a virescens mutant of barley (Hordeum vulgare L cv Gateway) grown for 6 days under continuous illumination had lower levels of photosystem II activities on a chlorophyll basis than wild-type seedlings. After 8 days, however, the photosystem II rates of the mutant and wild-type were approximately equal. Lower levels of the photosystem II activities in the mutant were correlated with a smaller functional plastoquinone pool size as determined by room temperature fluorescence induction. Higher levels of extractable plastoquinone A on a chlorophyll basis, however, were obtained from mutant chloroplasts. An increased room temperature fluorescence yield in the mutant was shown to be due to a higher level of initial fluorescence. A decreased sigmoidicity in the room temperature fluorescence induction transient in the presence of diuron and an increased 77 K fluorescence emission at 680 nanometers lead us to believe that a certain population of the light harvesting chlorophyll protein complex in the mutant membranes is unconnected to photo-system II reaction centers. Although photochemical activities of the mutant approach wild-type values as the mutant develops, the population of dissociated light harvesting complexes does not appear to change.
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
1026-31
pubmed:dateRevised
2010-9-14
pubmed:year
1982
pubmed:articleTitle
Photosystem II Activity, Plastoquinone A Levels, and Fluorescence Characterization of a Virescens Mutant of Barley.
pubmed:affiliation
Department of Plant Sciences, University of Alberta, Edmonton, Alberta T6G 2E3 Canada.
pubmed:publicationType
Journal Article