Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata
Identifieur interne : 003343 ( Main/Exploration ); précédent : 003342; suivant : 003344Citrus limon seedlings without functional chloroplasts are unable to induce phenylalanine ammonia-lyase in response to inoculation with Alternaria alternata
Auteurs : Humberto Prieto [Chili] ; Mario Chiong [Chili] ; Daniela Seelenfreund [Chili] ; Jorge Garrido [Chili] ; Alex Quaas [Chili] ; Luz M. Pérez [Chili]Source :
- Journal of Plant Physiology [ 0176-1617 ] ; 1997.
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Abstract
A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.)- Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. In addition, CO2 assimilation was not detected in NFZ-treated and etiolated seedlings, as compared to controls.
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DOI: 10.1016/S0176-1617(97)80278-7
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Pérez</name><affiliation wicri:level="1"><country xml:lang="fr">Chili</country><wicri:regionArea>Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1</wicri:regionArea><wicri:noRegion>Santiago 1</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Plant Physiology</title><title level="j" type="abbrev">JPLPH</title><idno type="ISSN">0176-1617</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1997">1997</date><biblScope unit="volume">150</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="645">645</biblScope><biblScope unit="page" to="651">651</biblScope></imprint><idno type="ISSN">0176-1617</idno></series><idno type="istex">F56A7D0C3EDA048248F7D3A7A66E27DA937F77B4</idno><idno type="DOI">10.1016/S0176-1617(97)80278-7</idno><idno type="PII">S0176-1617(97)80278-7</idno><idno type="ArticleID">80278</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0176-1617</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alternaria alternata</term><term>Citrus limon</term><term>HR</term><term>NFZ</term><term>Norfluorazon</term><term>PAL</term><term>PMSF</term><term>Rutaceae</term><term>chloroplasts</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">A light-dependent bleaching of plastids was induced in lemon seedlings through cultivation in the presence of the herbicide Norfluorazon (NFZ). Also, etiolated seedlings were obtained by cultivation under continuous dark conditions. When both types of seedlings were challenged with Alternaria alternata conidia, they were unable to induce phenylalanine ammonia-lyase, PAL (E.C. 4.3.1.5.)- Cell ultrastructure of control seedlings showed the presence of chloroplasts, while NFZ-treated lemon seedlings showed altered chloroplasts and in etiolated seedlings only proplastids were observed. 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