Linked Life Data

11778849

Source:http://linkedlifedata.com/resource/pubmed/id/11778849

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2002-1-7
pubmed:abstractText
This study examined the contribution of catalase (CAT) and superoxide dismutase (SOD) in the overall antioxidant response to norflurazon (NF)-induced oxidative stress in leaves, mesocotyls and scutella of maize (Zea mays). Maize catalase null mutants were used to provide insights into the role(s) of these isozymes. A substantial increase in Cat1 and Cat2 transcript levels occurred in NF-treated leaves in all maize lines examined. However, these two transcripts did not show a particular pattern of change in NF-treated scutella from 5-day postimbibition (dpi) and 18-day postpollination (dpp) maize. The NF-induced increase in Cat1 appeared to be dependent on excessive light energy caused by a lack of photoprotectant carotenoids. especially in leaves. In NF-treated leaves, the chloroplastic Cu/Zn-SOD-1 isozyme responded strongly compared to the cytosolic Cu/Zn-SOD and mitochondrial Mn-SOD-3 isozymes, suggesting the critical role of SOD-1 as a major component in chloroplastic antioxidant defenses. All SOD isozymes in the NF-treated scutella of various maize lines were consistent in their response to NF. The most significant increase was observed with Sod1 in NF-treated leaves; however, no significant Sod1 changes were observed in similarly treated scutella at 5 dpi and 18 dpp. These results suggest that the response of the Cat and Sod genes to NF is likely developmental and tissue-specific.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1351-0002
pubmed:author
pubmed:issnType
Print
pubmed:volume
6
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
311-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Differential antioxidant responses to norflurazon-induced oxidative stress in maize.
pubmed:affiliation
Department of Genetics, North Carolina State University, Raleigh 27695-7614, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't