Exogenous treatment with salicylic acid attenuates occurrence of citrus canker in susceptible navel orange (Citrus sinensis Osbeck)
Identifieur interne : 001613 ( Main/Exploration ); précédent : 001612; suivant : 001614Exogenous treatment with salicylic acid attenuates occurrence of citrus canker in susceptible navel orange (Citrus sinensis Osbeck)
Auteurs : YIN WANG [République populaire de Chine] ; Ji-Hong Liu [République populaire de Chine]Source :
- Journal of plant physiology [ 0176-1617 ] ; 2012.
Descripteurs français
- Pascal (Inist)
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- topic : Agrume.
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Abstract
Citrus canker caused by Xanthomonas axonopodis pv. citri (Xac) is a devastating bacterial disease threatening the citrus industry. Salicylic acid (SA) plays a key role in plant defense response to biotic stress, but information is scarce concerning the application of SA to enhancing Xac resistance. In the present research attempts were made to investigate how exogenous application of SA influenced canker disease outbreak in navel orange (Citrus sinensis). Exogenously applied SA at 0.25 mM significantly enhanced the endogenous free and bound SA, particularly the latter. Upon exposure to Xac, lower disease incidence rate and smaller lesion sites were observed in the samples pre-treated with SA, accompanied by repression of bacterial growth at the lesion sites. Concurrent with the augmented disease resistance, SA-treated leaves had higher H2O2 level and smaller stomata apertures before or after Xac infection when compared with their counterparts pre-treated with water (control). SA treatment elevated the activities of phenylalanine ammonia-lyase and β-1,3-glucanase, but only the latter was higher in the SA-treated samples after Xac infection. In addition, mRNA levels of two pathogenesis-related genes, CsCHI and CsPR4A, were higher in the SA-treated samples relative to the control. Taken together, our results strongly suggest that the exogenously applied SA has evoked a cascade of physiological and molecular events that function singly or in concert to confer resistance to Xac invasion.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Exogenous treatment with salicylic acid attenuates occurrence of citrus canker in susceptible navel orange (Citrus sinensis Osbeck)</title><author><name sortKey="Yin Wang" sort="Yin Wang" uniqKey="Yin Wang" last="Yin Wang">YIN WANG</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Key Laboratory of Horticultural Plant Biology of Ministry of Education, College of Horticulture and Forestry Sciences, HuazhongAgricultural University</s1><s2>Wuhan 430070</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Wuhan 430070</wicri:noRegion></affiliation></author><author><name sortKey="Liu, Ji Hong" sort="Liu, Ji Hong" uniqKey="Liu J" first="Ji-Hong" last="Liu">Ji-Hong Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Key Laboratory of Horticultural Plant Biology of Ministry of Education, College of Horticulture and Forestry Sciences, HuazhongAgricultural University</s1><s2>Wuhan 430070</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Wuhan 430070</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0321452</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0321452 INIST</idno><idno type="RBID">Pascal:12-0321452</idno><idno type="wicri:Area/PascalFrancis/Corpus">000090</idno><idno type="wicri:Area/PascalFrancis/Curation">000910</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000114</idno><idno type="wicri:doubleKey">0176-1617:2012:Yin Wang:exogenous:treatment:with</idno><idno type="wicri:Area/Main/Merge">001632</idno><idno type="wicri:Area/Main/Curation">001613</idno><idno type="wicri:Area/Main/Exploration">001613</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Exogenous treatment with salicylic acid attenuates occurrence of citrus canker in susceptible navel orange (Citrus sinensis Osbeck)</title><author><name sortKey="Yin Wang" sort="Yin Wang" uniqKey="Yin Wang" last="Yin Wang">YIN WANG</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Key Laboratory of Horticultural Plant Biology of Ministry of Education, College of Horticulture and Forestry Sciences, HuazhongAgricultural University</s1><s2>Wuhan 430070</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Wuhan 430070</wicri:noRegion></affiliation></author><author><name sortKey="Liu, Ji Hong" sort="Liu, Ji Hong" uniqKey="Liu J" first="Ji-Hong" last="Liu">Ji-Hong Liu</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Key Laboratory of Horticultural Plant Biology of Ministry of Education, College of Horticulture and Forestry Sciences, HuazhongAgricultural University</s1><s2>Wuhan 430070</s2><s3>CHN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>République populaire de Chine</country><wicri:noRegion>Wuhan 430070</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of plant physiology</title><title level="j" type="abbreviated">J. plant physiol.</title><idno type="ISSN">0176-1617</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of plant physiology</title><title level="j" type="abbreviated">J. plant physiol.</title><idno type="ISSN">0176-1617</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus fruit</term><term>Citrus sinensis</term><term>Exogenous</term><term>Hydrogen peroxide</term><term>Pathogenesis related protein</term><term>Plant cankers</term><term>Plant physiology</term><term>Salicylic acid</term><term>Sensitivity resistance</term><term>Xanthomonas axonopodis</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Exogène</term><term>Sensibilité résistance</term><term>Protéine PR</term><term>Agrume</term><term>Citrus sinensis</term><term>Xanthomonas axonopodis</term><term>Acide salicylique</term><term>Peroxyde d'hydrogène</term><term>Chancre plante</term><term>Physiologie végétale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Agrume</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Citrus canker caused by Xanthomonas axonopodis pv. citri (Xac) is a devastating bacterial disease threatening the citrus industry. Salicylic acid (SA) plays a key role in plant defense response to biotic stress, but information is scarce concerning the application of SA to enhancing Xac resistance. In the present research attempts were made to investigate how exogenous application of SA influenced canker disease outbreak in navel orange (Citrus sinensis). Exogenously applied SA at 0.25 mM significantly enhanced the endogenous free and bound SA, particularly the latter. Upon exposure to Xac, lower disease incidence rate and smaller lesion sites were observed in the samples pre-treated with SA, accompanied by repression of bacterial growth at the lesion sites. Concurrent with the augmented disease resistance, SA-treated leaves had higher H<sub>2</sub>O<sub>2</sub> level and smaller stomata apertures before or after Xac infection when compared with their counterparts pre-treated with water (control). SA treatment elevated the activities of phenylalanine ammonia-lyase and β-1,3-glucanase, but only the latter was higher in the SA-treated samples after Xac infection. In addition, mRNA levels of two pathogenesis-related genes, CsCHI and CsPR4A, were higher in the SA-treated samples relative to the control. Taken together, our results strongly suggest that the exogenously applied SA has evoked a cascade of physiological and molecular events that function singly or in concert to confer resistance to Xac invasion.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="Yin Wang" sort="Yin Wang" uniqKey="Yin Wang" last="Yin Wang">YIN WANG</name></noRegion><name sortKey="Liu, Ji Hong" sort="Liu, Ji Hong" uniqKey="Liu J" first="Ji-Hong" last="Liu">Ji-Hong Liu</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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