Linked Life Data

15107451

Source:http://linkedlifedata.com/resource/pubmed/id/15107451

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
400
pubmed:dateCreated
2004-5-27
pubmed:abstractText
High-resolution imaging of chlorophyll a fluorescence from intact tobacco leaves was used to compare the quantum yield of PSII electron transport in the chloroplasts of guard cells with that in the underlying mesophyll cells. Transgenic tobacco plants with reduced amounts of Rubisco (anti-Rubisco plants) were compared with wild-type tobacco plants. The quantum yield of PSII in both guard cells and underlying mesophyll cells was less in anti-Rubisco plants than in wild-type plants, but closely matched between the two cell types regardless of genotype. CO2 assimilation rates of anti-Rubisco plants were 4.4 micromol m(-2) s(-1) compared with 17.3 micromol m(-2) s(-1) for the wild type, when measured at a photon irradiance of 1000 micromol m(-2) s(-1) and ambient CO2 of 380 micromol mol(-1). Despite the large difference in photosynthetic capacity between the anti-Rubisco and wild-type plants, there was no discernible difference in the rate of stomatal opening, steady-state stomatal conductance or response of stomatal conductance to ambient CO2 concentration. These data demonstrate clearly that the commonly observed correlation between photosynthetic capacity and stomatal conductance can be disrupted in the long term by manipulation of photosynthetic capacity via antisense RNA technology. It was concluded that stomatal conductance is not directly determined by the photosynthetic capacity of guard cells or the leaf mesophyll.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0022-0957
pubmed:author
pubmed:copyrightInfo
Copyright 2004 Society for Experimental Biology
pubmed:issnType
Print
pubmed:volume
55
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1157-66
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Stomatal conductance does not correlate with photosynthetic capacity in transgenic tobacco with reduced amounts of Rubisco.
pubmed:affiliation
Molecular Plant Physiology Group, Research School of Biological Sciences, Australian National University, Canberra, ACT 2601, Australia. Susanne.Caemmerer@anu.edu.au
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't