Title : ( Riboflavin induces resistance in rice against Rhizoctonia solani via jasmonate-mediated priming of phenylpropanoid pathway )
Authors: Parissa Taheri , Saeed Tarighi ,
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Abstract
Vitaminsareplantgrowthregulatorsandactivatorsofdefenseresponsesagainstpathogens.The cytomolecular mechanismsinvolvedin the induction ofresistancebychemicalsespeciallyvitaminson monocotyledonous plants are largelyunknown.Here,weshowthatriboflavin,whichactsasadefense activatorinriceagainsteconomicallyimportantsheathblightcausedby Rhizoctoniasolani, primedthe expressionoflipoxygenase(LOX) asakeygeneinoctadecanoidpathway,andenhancedlignification. Exogenousjasmonicacid(JA)applicationonriceinducesresistanceagainst R. solani in amannersimilar to riboflavin.Applicationofjasmonate-deficient rice mutant hebiba and usingaLOXinhibitorrevealed the mainroleofoctadecanoidpathwayinriboflavin-induced resistance (IR).Inriboflavin-treated inoculatedplants,upregulationofphenylalanineammonia-lyase(PAL) expression,asamajormarkerof phenylpropanoidpathway,wasdetecteddownstreamof LOX upregulation. Co-applicationofriboflavin and 5, 8,11,14-eicosatetraynoicacid(ETYA) on rice leavesrevealednoupregulationof PAL and no priminginlignification.Furthermore,lowerlevelsof PAL transcripts andligninweredetectedin hebiba compared with control.Thesefindingsindicatetheroleofoctadecanoidpathwayin the induction of phenylpropanoidmetabolismleadingtolignificationasanovelmechanismofriboflavin-IRin Oryza sativa–R. solani pathosystem.
Keywords
, Jasmonic acid Monocot Phenylalanineammonia, lyase Thanatephorus cucumeris Vitamin B2
@article{paperid:1011681,
author = {Taheri, Parissa and Tarighi, Saeed},
title = {Riboflavin induces resistance in rice against Rhizoctonia solani via jasmonate-mediated priming of phenylpropanoid pathway},
journal = {Journal of Plant Physiology},
year = {2010},
volume = {167},
number = {3},
month = {January},
issn = {0176-1617},
pages = {201--208},
numpages = {7},
keywords = {Jasmonic acid
Monocot
Phenylalanineammonia-lyase
Thanatephorus cucumeris
Vitamin B2},
}
%0 Journal Article
%T Riboflavin induces resistance in rice against Rhizoctonia solani via jasmonate-mediated priming of phenylpropanoid pathway
%A Taheri, Parissa
%A Tarighi, Saeed
%J Journal of Plant Physiology
%@ 0176-1617
%D 2010
