Linked Life Data

9807813

Source:http://linkedlifedata.com/resource/pubmed/id/9807813

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1998-12-11
pubmed:abstractText
Jasmonic acid has properties of a plant hormone, including the induction of specific genes associated with plant defense. We previously described jar1-1, an Arabidopsis jasmonate response mutant that exhibits reduced sensitivity to methyl jasmonate. We have further characterized this mutant and two new alleles; jar1-2 from a gamma irradiated population, and jar1-4 from a T-DNA mutant population. Seedling root growth in jar1-1 was equally insensitive to methyl jasmonate and jasmonic acid, indicating that the defect was not in the conversion of methyl jasmonate to the acid. None of the jar1 mutants showed an altered sensitivity to auxin, cytokinin, or the ethylene precursor 1-aminocyclopropane-1-carboxylic acid, indicating that the lesion does not affect the general uptake or transport of hormones. A soil fungus, Pythium irregulare, was found to blight jar1-1. Cultures of this organism caused the symptoms in all three jar1 mutants but not in wild type, indicating that increased susceptibility was due to the lesion in the JAR1 locus. A fatty acid desaturase triple mutant that is defective in the biosynthesis of jasmonic acid (J. Browse, Washington State University) was also susceptible, confirming that jasmonate is involved in resistance. The jar1-1 locus was mapped to the lower end of chromosome 2, about 11.4 cM from as1 and 1.6 cM from cer8. These results establish that jasmonate signaling plays an important role in resistance to soil micro-organisms in plants.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0960-7412
pubmed:author
pubmed:issnType
Print
pubmed:volume
15
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
747-54
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Jasmonate signaling mutants of Arabidopsis are susceptible to the soil fungus Pythium irregulare.
pubmed:affiliation
Department of Agronomy, University of Nebraska, Lincoln 68583-0915, USA. pstaswick@crcvms.unl.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.