Occurrence of Fusarium-produced naphthazarins in citrus trees and sensitivity of rootstocks to isomarticin in relation to citrus blight
Identifieur interne : 003009 ( Main/Merge ); précédent : 003008; suivant : 003010Occurrence of Fusarium-produced naphthazarins in citrus trees and sensitivity of rootstocks to isomarticin in relation to citrus blight
Auteurs : J. C. Janse Van Rensburg [Afrique du Sud] ; N. Labuschagne [Afrique du Sud] ; S. Nemec [États-Unis]Source :
- Plant pathology [ 0032-0862 ] ; 2001.
Descripteurs français
- Pascal (Inist)
- Maladie présumée infectieuse, Mycose, Concentration chimique, Déficit, Etiopathogénie, Phytotoxicité, Tolérance, Trouble nutrition, Xylème, Porte greffe, Citrus, Fusarium solani, Poncirus, Phytotoxine, Zinc, Etude expérimentale, Etude en serre, Culture hydroponique, Etude sur terrain, République Sud Africaine, Citrus jambhiri, Citrus limonia, Citrus paradisi Poncirus trifoliata, Citrus reticulata, Citrus sinensis, Citrus sinensis Poncirus trifoliata, Isomarticine, Naphthazarine, Dépérissement agrume.
- Wicri :
English descriptors
Abstract
Fusarium solani, the causal fungus of root and crown rot of citrus, produces naphthazarin toxins that were shown to be toxic to citrus plants. It was found that citrus trees in South Africa had varying levels of naphthazarins in their xylem. Significantly higher concentrations of these toxins were detected in trees with blight symptoms than in symptomless trees. Citrus seedlings grown in hydroponic culture containing isomarticin showed inhibition of growth, shortening of roots and accumulation of zinc in the trunk wood. Zinc deficiency symptoms were also observed on certain rootstocks. A procedural ranking of rootstocks indicated that trees with observed tolerance to blight in the field generally had higher tolerance to isomarticin in hydroponic culture, whereas trees susceptible to blight were more sensitive to the toxin. These findings indicate that Fusarium-produced isomarticin is involved in the induction of some of the symptoms associated with citrus blight syndrome.
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Labuschagne</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Microbiology and Plant Pathology, Faculty of Biological and Agricultural Sciences, University of Pretoria</s1><s2>Pretoria, 0002</s2><s3>ZAF</s3><sZ>2 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Pretoria, 0002</wicri:noRegion></affiliation></author><author><name sortKey="Nemec, S" sort="Nemec, S" uniqKey="Nemec S" first="S." last="Nemec">S. 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C." last="Janse Van Rensburg">J. C. Janse Van Rensburg</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Agricultural Research Council, Plant Protection Research Institute, Private Bag X5017</s1><s2>Stellenbosch, 7599</s2><s3>ZAF</s3><sZ>1 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Stellenbosch, 7599</wicri:noRegion></affiliation></author><author><name sortKey="Labuschagne, N" sort="Labuschagne, N" uniqKey="Labuschagne N" first="N." last="Labuschagne">N. Labuschagne</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Microbiology and Plant Pathology, Faculty of Biological and Agricultural Sciences, University of Pretoria</s1><s2>Pretoria, 0002</s2><s3>ZAF</s3><sZ>2 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Pretoria, 0002</wicri:noRegion></affiliation></author><author><name sortKey="Nemec, S" sort="Nemec, S" uniqKey="Nemec S" first="S." last="Nemec">S. Nemec</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Science and Technology Department, Valencia Community College, 1800 S Kirkman Road</s1><s2>Orlando, FL</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Plant pathology</title><title level="j" type="abbreviated">Plant pathol.</title><idno type="ISSN">0032-0862</idno><imprint><date when="2001">2001</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Plant pathology</title><title level="j" type="abbreviated">Plant pathol.</title><idno type="ISSN">0032-0862</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus</term><term>Fusarium solani</term><term>Rootstock</term><term>South Africa(Republic)</term><term>Tolerance</term><term>citrus blight</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Maladie présumée infectieuse</term><term>Mycose</term><term>Concentration chimique</term><term>Déficit</term><term>Etiopathogénie</term><term>Phytotoxicité</term><term>Tolérance</term><term>Trouble nutrition</term><term>Xylème</term><term>Porte greffe</term><term>Citrus</term><term>Fusarium solani</term><term>Poncirus</term><term>Phytotoxine</term><term>Zinc</term><term>Etude expérimentale</term><term>Etude en serre</term><term>Culture hydroponique</term><term>Etude sur terrain</term><term>République Sud Africaine</term><term>Citrus jambhiri</term><term>Citrus limonia</term><term>Citrus paradisi Poncirus trifoliata</term><term>Citrus reticulata</term><term>Citrus sinensis</term><term>Citrus sinensis Poncirus trifoliata</term><term>Isomarticine</term><term>Naphthazarine</term><term>Dépérissement agrume</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Déficit</term><term>Zinc</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Fusarium solani, the causal fungus of root and crown rot of citrus, produces naphthazarin toxins that were shown to be toxic to citrus plants. It was found that citrus trees in South Africa had varying levels of naphthazarins in their xylem. Significantly higher concentrations of these toxins were detected in trees with blight symptoms than in symptomless trees. Citrus seedlings grown in hydroponic culture containing isomarticin showed inhibition of growth, shortening of roots and accumulation of zinc in the trunk wood. Zinc deficiency symptoms were also observed on certain rootstocks. A procedural ranking of rootstocks indicated that trees with observed tolerance to blight in the field generally had higher tolerance to isomarticin in hydroponic culture, whereas trees susceptible to blight were more sensitive to the toxin. These findings indicate that Fusarium-produced isomarticin is involved in the induction of some of the symptoms associated with citrus blight syndrome.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li><li>États-Unis</li></country><region><li>Floride</li></region></list><tree><country name="Afrique du Sud"><noRegion><name sortKey="Janse Van Rensburg, J C" sort="Janse Van Rensburg, J C" uniqKey="Janse Van Rensburg J" first="J. C." last="Janse Van Rensburg">J. C. Janse Van Rensburg</name></noRegion><name sortKey="Labuschagne, N" sort="Labuschagne, N" uniqKey="Labuschagne N" first="N." last="Labuschagne">N. Labuschagne</name></country><country name="États-Unis"><region name="Floride"><name sortKey="Nemec, S" sort="Nemec, S" uniqKey="Nemec S" first="S." last="Nemec">S. Nemec</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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