Linked Life Data

20553418

Source:http://linkedlifedata.com/resource/pubmed/id/20553418

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2010-11-5
pubmed:abstractText
Reactive oxygen species (ROS) resulting from oxygen reduction, superoxide anion radical O2(*-) and hydrogen peroxide H(2)O(2) are very significant in the cell metabolism of aerobic organisms. They can be destructive and lead to apoptosis and they can also serve as signal molecules. In the light, chloroplasts are known to be one of the main sources of ROS in plants. However, the components involved in oxygen reduction and the detailed chemical mechanism are not yet well established. The present review describes the experimental data and theoretical considerations that implicate the plastoquinone pool (PQ-pool) in this process. The evidence indicates that the PQ-pool has a dual role: (1) the reduction of O(2) by plastosemiquinone to superoxide and (2) the reduction of superoxide by plastohydroquinone to hydrogen peroxide. The second role represents not only the scavenging of superoxide, but also the generation of hydrogen peroxide as an important signaling molecule. The regulatory and protective functions of the PQ-pool are discussed in the context of these reactions.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1399-3054
pubmed:author
pubmed:copyrightInfo
Copyright © Physiologia Plantarum 2010.
pubmed:issnType
Electronic
pubmed:volume
140
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
103-10
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
The production and scavenging of reactive oxygen species in the plastoquinone pool of chloroplast thylakoid membranes.
pubmed:affiliation
Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Russia.
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't