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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
3
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pubmed:dateCreated |
1998-4-20
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pubmed:databankReference |
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pubmed:abstractText |
Sorghum (Sorghum bicolor L. Moench) accumulates the anthocyanin cyanidin 3-dimalonyl glucoside in etiolated mesocotyls in response to light. Inoculation with the nonpathogenic fungus Cochliobolus heterostrophus drastically reduced the light-induced accumulation of anthocyanin by repressing the transcription of the anthocyanin biosynthesis genes encoding flavanone 3-hydroxylase, dihydroflavonol 4-reductase, and anthocyanidin synthase. In contrast to these repression effects, fungal inoculation resulted in the synthesis of the four known 3-deoxyanthocyanidin phytoalexins and a corresponding activation of genes encoding the key branch-point enzymes in the phenylpropanoid pathway, phenylalanine ammonia-lyase and chalcone synthase. In addition, a gene encoding the pathogenesis-related protein PR-10 was strongly induced in response to inoculation. The accumulation of phytoalexins leveled off by 48 h after inoculation and was accompanied by a more rapid increase in the rate of anthocyanin accumulation. The results suggest that the plant represses less essential metabolic activities such as anthocyanin synthesis as a means of compensating for the immediate biochemical and physiological needs for the defense response.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Acyltransferases,
http://linkedlifedata.com/resource/pubmed/chemical/Alcohol Oxidoreductases,
http://linkedlifedata.com/resource/pubmed/chemical/Anthocyanins,
http://linkedlifedata.com/resource/pubmed/chemical/Benzopyrans,
http://linkedlifedata.com/resource/pubmed/chemical/Glucosides,
http://linkedlifedata.com/resource/pubmed/chemical/Glucosyltransferases,
http://linkedlifedata.com/resource/pubmed/chemical/Mixed Function Oxygenases,
http://linkedlifedata.com/resource/pubmed/chemical/Phenylalanine Ammonia-Lyase,
http://linkedlifedata.com/resource/pubmed/chemical/Plant Extracts,
http://linkedlifedata.com/resource/pubmed/chemical/Plant Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Sesquiterpenes,
http://linkedlifedata.com/resource/pubmed/chemical/Terpenes,
http://linkedlifedata.com/resource/pubmed/chemical/cyanidin,
http://linkedlifedata.com/resource/pubmed/chemical/dihydroflavanol 4-reductase,
http://linkedlifedata.com/resource/pubmed/chemical/flavanone 3-dioxygenase,
http://linkedlifedata.com/resource/pubmed/chemical/flavanone synthetase,
http://linkedlifedata.com/resource/pubmed/chemical/flavonol 3-O-glucosyltransferase,
http://linkedlifedata.com/resource/pubmed/chemical/pathogenesis-related proteins, plant,
http://linkedlifedata.com/resource/pubmed/chemical/phytoalexins
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pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0032-0889
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
116
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
979-89
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pubmed:dateRevised |
2010-11-18
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pubmed:meshHeading |
pubmed-meshheading:9501130-Acyltransferases,
pubmed-meshheading:9501130-Alcohol Oxidoreductases,
pubmed-meshheading:9501130-Anthocyanins,
pubmed-meshheading:9501130-Benzopyrans,
pubmed-meshheading:9501130-Blotting, Northern,
pubmed-meshheading:9501130-Cereals,
pubmed-meshheading:9501130-Chromatography, High Pressure Liquid,
pubmed-meshheading:9501130-Cotyledon,
pubmed-meshheading:9501130-Gene Expression Regulation, Plant,
pubmed-meshheading:9501130-Glucosides,
pubmed-meshheading:9501130-Glucosyltransferases,
pubmed-meshheading:9501130-Light,
pubmed-meshheading:9501130-Mixed Function Oxygenases,
pubmed-meshheading:9501130-Molecular Sequence Data,
pubmed-meshheading:9501130-Phenylalanine Ammonia-Lyase,
pubmed-meshheading:9501130-Plant Diseases,
pubmed-meshheading:9501130-Plant Extracts,
pubmed-meshheading:9501130-Plant Proteins,
pubmed-meshheading:9501130-Sesquiterpenes,
pubmed-meshheading:9501130-Spectrometry, Mass, Matrix-Assisted Laser...,
pubmed-meshheading:9501130-Terpenes
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pubmed:year |
1998
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pubmed:articleTitle |
Reduction of light-induced anthocyanin accumulation in inoculated sorghum mesocotyls. Implications for a compensatory role in the defense response.
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pubmed:affiliation |
Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907-1155, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.
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