OrangerV1, PascalFrancis, Corpus, bibRecord, 000601

Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling

Identifieur interne : 000601 ( PascalFrancis/Corpus ); précédent : 000600; suivant : 000602

Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling

Auteurs : Fernando Alferez ; Shila Singh ; Ann L. Umbach ; Brandon Hockema ; Jacqueline K. Burns

Source :

Plant, cell and environment : (Print) [ 0140-7791 ] ; 2005.

RBID : Pascal:05-0487640

Descripteurs français

Pascal (Inist)
- Abscission, Lipide, Pyrazole dérivé, Fruit, Racine, Développement, Mitochondrie, Chloroplaste, Alcohol dehydrogenase, Citrus sinensis, Arabidopsis thaliana, Glycine max, Pisum sativum, Oxidase, ATP, Feuille végétal, Lipoxygenase, Sénescence.

English descriptors

KwdEn :
- ATP, Abscission, Alcohol dehydrogenase, Arabidopsis thaliana, Chloroplast, Citrus sinensis, Development, Fruit, Glycine max, Lipids, Lipoxygenase, Mitochondria, Oxidase, Pisum sativum, Plant leaf, Pyrazole derivatives, Root, Senescence.

Abstract

The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A₂ (PLA₂) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA₂ activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA₂ and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA₂ and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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C01	`01`		`ENG`	@0 The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A₂ (PLA₂) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA₂ activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA₂ and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA₂ and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.
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C03	`13`	`X`	`FRE`	`@0 Pisum sativum @2 NS @5 13`
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Format Inist (serveur)

NO :	PASCAL 05-0487640 INIST
ET :	Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling
AU :	ALFEREZ (Fernando); SINGH (Shila); UMBACH (Ann L.); HOCKEMA (Brandon); BURNS (Jacqueline K.)
AF :	University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, Florida 33850-2299/Etats-Unis (1 aut., 2 aut., 4 aut., 5 aut.); Duke University, DCMB Group/Biology Department/Durham, North Carolina, 27708-1000/Etats-Unis (3 aut.)
DT :	Publication en série; Niveau analytique
SO :	Plant, cell and environment : (Print); ISSN 0140-7791; Coden PLCEDV; Royaume-Uni; Da. 2005; Vol. 28; No. 11; Pp. 1436-1449; Bibl. 1 p.1/4
LA :	Anglais
EA :	The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A₂ (PLA₂) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA₂ activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA₂ and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA₂ and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.
CC :	002A04H17
FD :	Abscission; Lipide; Pyrazole dérivé; Fruit; Racine; Développement; Mitochondrie; Chloroplaste; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Feuille végétal; Phospholipase A₂; Lipoxygenase; Sénescence
FG :	Oxidoreductases; Enzyme; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Cruciferae; Leguminosae; Carboxylic ester hydrolases; Esterases; Hydrolases
ED :	Abscission; Lipids; Pyrazole derivatives; Fruit; Root; Development; Mitochondria; Chloroplast; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Plant leaf; Phospholipase A₂; Lipoxygenase; Senescence
EG :	Oxidoreductases; Enzyme; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Cruciferae; Leguminosae; Carboxylic ester hydrolases; Esterases; Hydrolases
SD :	Abscisión; Lípido; Pirazol derivado; Fruto; Raíz; Desarrollo; Mitocondria; Cloroplasto; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Hoja vegetal; Phospholipase A₂; Lipoxygenase; Senescencia
LO :	INIST-17987.354000132558400090
ID :	05-0487640

Links to Exploration step

Pascal:05-0487640

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>ATP</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Abscission</term>
<term>Lipide</term>
<term>Pyrazole dérivé</term>
<term>Fruit</term>
<term>Racine</term>
<term>Développement</term>
<term>Mitochondrie</term>
<term>Chloroplaste</term>
<term>Alcohol dehydrogenase</term>
<term>Citrus sinensis</term>
<term>Arabidopsis thaliana</term>
<term>Glycine max</term>
<term>Pisum sativum</term>
<term>Oxidase</term>
<term>ATP</term>
<term>Feuille végétal</term>
<term>Lipoxygenase</term>
<term>Sénescence</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A<sub>2</sub>
 (PLA<sub>2</sub>
) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA<sub>2</sub>
 activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA<sub>2</sub>
 and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA<sub>2</sub>
 and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0140-7791</s0>
</fA01>
<fA02 i1="01"><s0>PLCEDV</s0>
</fA02>
<fA03 i2="1"><s0>Plant cell environ. : (Print)</s0>
</fA03>
<fA05><s2>28</s2>
</fA05>
<fA06><s2>11</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG"><s1>Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>ALFEREZ (Fernando)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>SINGH (Shila)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>UMBACH (Ann L.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>HOCKEMA (Brandon)</s1>
</fA11>
<fA11 i1="05" i2="1"><s1>BURNS (Jacqueline K.)</s1>
</fA11>
<fA14 i1="01"><s1>University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road</s1>
<s2>Lake Alfred, Florida 33850-2299</s2>
<s3>USA</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Duke University, DCMB Group/Biology Department</s1>
<s2>Durham, North Carolina, 27708-1000</s2>
<s3>USA</s3>
<sZ>3 aut.</sZ>
</fA14>
<fA20><s1>1436-1449</s1>
</fA20>
<fA21><s1>2005</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
</fA23>
<fA43 i1="01"><s1>INIST</s1>
<s2>17987</s2>
<s5>354000132558400090</s5>
</fA43>
<fA44><s0>0000</s0>
<s1>© 2005 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45><s0>1 p.1/4</s0>
</fA45>
<fA47 i1="01" i2="1"><s0>05-0487640</s0>
</fA47>
<fA60><s1>P</s1>
</fA60>
<fA61><s0>A</s0>
</fA61>
<fA64 i1="01" i2="1"><s0>Plant, cell and environment : (Print)</s0>
</fA64>
<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A<sub>2</sub>
 (PLA<sub>2</sub>
) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA<sub>2</sub>
 activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA<sub>2</sub>
 and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA<sub>2</sub>
 and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.</s0>
</fC01>
<fC02 i1="01" i2="X"><s0>002A04H17</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Abscission</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Abscission</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Abscisión</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Lipide</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Lipids</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Lípido</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Pyrazole dérivé</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Pyrazole derivatives</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Pirazol derivado</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Fruit</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Fruit</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Fruto</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Racine</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Root</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Raíz</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Développement</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Development</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Desarrollo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Mitochondrie</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Mitochondria</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Mitocondria</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Chloroplaste</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Chloroplast</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Cloroplasto</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Alcohol dehydrogenase</s0>
<s2>FE</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Alcohol dehydrogenase</s0>
<s2>FE</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Alcohol dehydrogenase</s0>
<s2>FE</s2>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Arabidopsis thaliana</s0>
<s2>NS</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Arabidopsis thaliana</s0>
<s2>NS</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Arabidopsis thaliana</s0>
<s2>NS</s2>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Glycine max</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Glycine max</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Glycine max</s0>
<s2>NS</s2>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Pisum sativum</s0>
<s2>NS</s2>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Pisum sativum</s0>
<s2>NS</s2>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Pisum sativum</s0>
<s2>NS</s2>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Oxidase</s0>
<s2>FE</s2>
<s5>33</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>Oxidase</s0>
<s2>FE</s2>
<s5>33</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Oxidase</s0>
<s2>FE</s2>
<s5>33</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>ATP</s0>
<s5>34</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>ATP</s0>
<s5>34</s5>
</fC03>
<fC03 i1="15" i2="X" l="SPA"><s0>ATP</s0>
<s5>34</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>Feuille végétal</s0>
<s5>35</s5>
</fC03>
<fC03 i1="16" i2="X" l="ENG"><s0>Plant leaf</s0>
<s5>35</s5>
</fC03>
<fC03 i1="16" i2="X" l="SPA"><s0>Hoja vegetal</s0>
<s5>35</s5>
</fC03>
<fC03 i1="17" i2="X" l="FRE"><s0>Phospholipase A<sub>2</sub>
</s0>
<s2>FE</s2>
<s5>36</s5>
</fC03>
<fC03 i1="17" i2="X" l="ENG"><s0>Phospholipase A<sub>2</sub>
</s0>
<s2>FE</s2>
<s5>36</s5>
</fC03>
<fC03 i1="17" i2="X" l="SPA"><s0>Phospholipase A<sub>2</sub>
</s0>
<s2>FE</s2>
<s5>36</s5>
</fC03>
<fC03 i1="18" i2="X" l="FRE"><s0>Lipoxygenase</s0>
<s2>FE</s2>
<s5>37</s5>
</fC03>
<fC03 i1="18" i2="X" l="ENG"><s0>Lipoxygenase</s0>
<s2>FE</s2>
<s5>37</s5>
</fC03>
<fC03 i1="18" i2="X" l="SPA"><s0>Lipoxygenase</s0>
<s2>FE</s2>
<s5>37</s5>
</fC03>
<fC03 i1="19" i2="X" l="FRE"><s0>Sénescence</s0>
<s5>38</s5>
</fC03>
<fC03 i1="19" i2="X" l="ENG"><s0>Senescence</s0>
<s5>38</s5>
</fC03>
<fC03 i1="19" i2="X" l="SPA"><s0>Senescencia</s0>
<s5>38</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Oxidoreductases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Oxidoreductases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Oxidoreductases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE"><s0>Enzyme</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG"><s0>Enzyme</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA"><s0>Enzima</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA"><s0>Rutaceae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="ENG"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="SPA"><s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="FRE"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="ENG"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="05" i2="X" l="SPA"><s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="FRE"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="ENG"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="06" i2="X" l="SPA"><s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="FRE"><s0>Cruciferae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="ENG"><s0>Cruciferae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="07" i2="X" l="SPA"><s0>Cruciferae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="FRE"><s0>Leguminosae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="ENG"><s0>Leguminosae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="08" i2="X" l="SPA"><s0>Leguminosae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="09" i2="X" l="FRE"><s0>Carboxylic ester hydrolases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="09" i2="X" l="ENG"><s0>Carboxylic ester hydrolases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="09" i2="X" l="SPA"><s0>Carboxylic ester hydrolases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="10" i2="X" l="FRE"><s0>Esterases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="10" i2="X" l="ENG"><s0>Esterases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="10" i2="X" l="SPA"><s0>Esterases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="11" i2="X" l="FRE"><s0>Hydrolases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="11" i2="X" l="ENG"><s0>Hydrolases</s0>
<s2>FE</s2>
</fC07>
<fC07 i1="11" i2="X" l="SPA"><s0>Hydrolases</s0>
<s2>FE</s2>
</fC07>
<fN21><s1>339</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
<server><NO>PASCAL 05-0487640 INIST</NO>
<ET>Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling</ET>
<AU>ALFEREZ (Fernando); SINGH (Shila); UMBACH (Ann L.); HOCKEMA (Brandon); BURNS (Jacqueline K.)</AU>
<AF>University of Florida, IFAS, Horticultural Sciences Department, Citrus Research and Education Center, 700 Experiment Station Road/Lake Alfred, Florida 33850-2299/Etats-Unis (1 aut., 2 aut., 4 aut., 5 aut.); Duke University, DCMB Group/Biology Department/Durham, North Carolina, 27708-1000/Etats-Unis (3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Plant, cell and environment : (Print); ISSN 0140-7791; Coden PLCEDV; Royaume-Uni; Da. 2005; Vol. 28; No. 11; Pp. 1436-1449; Bibl. 1 p.1/4</SO>
<LA>Anglais</LA>
<EA>The compound 5-chloro-3-niethyl-4-nitro-1H-pyrazole (CMNP) is a pyrazole-derivative that induces abscission selectively in mature citrus (Citrus sinensis) fruit when applied to the canopy and has herbicidal activity on plants when applied to roots. Despite the favourable efficacy of this compound, the mode of action remains unknown. To gain information about the mode of action of CMNP, the effect of application to mature citrus fruit and Arabidopsis thaliana roots was explored. Peel contact was essential for mature fruit abscission in citrus, whereas root drenching was essential for symptom development and plant decline in Arabidopsis. CMNP was identified as an uncoupler in isolated soybean (Glycine max) mitochondria and pea (Pisum sativum) chloroplasts and an inhibitor of alcohol dehydrogenase in citrus peel, but not an inhibitor of proto-porphyrinogen IX oxidase. CMNP treatment reduced ATP content in citrus peel and Arabidopsis leaves. Phospholipase A<sub>2</sub>
 (PLA<sub>2</sub>
) and lipoxygenase (LOX) activities, and lipid hydroperoxide (LPO) levels increased in flavedo of citrus fruit peel and leaves of Arabidopsis plants treated with CMNP. An inhibitor of PLA<sub>2</sub>
 activity, aristolochic acid (AT), reduced CMNP-induced increases in PLA<sub>2</sub>
 and LOX activities and LPO levels in citrus flavedo and Arabidopsis leaves and greatly reduced abscission in citrus and delayed symptoms of plant decline in Arabidopsis. However, AT treatment failed to halt the reduction in ATP content. Reduction in ATP content preceded the increase in PLA<sub>2</sub>
 and LOX activities, LPO content and the biological response. The results indicate a link between lipid signalling, abscission in citrus and herbicidal damage in Arabidopsis.</EA>
<CC>002A04H17</CC>
<FD>Abscission; Lipide; Pyrazole dérivé; Fruit; Racine; Développement; Mitochondrie; Chloroplaste; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Feuille végétal; Phospholipase A<sub>2</sub>
; Lipoxygenase; Sénescence</FD>
<FG>Oxidoreductases; Enzyme; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Cruciferae; Leguminosae; Carboxylic ester hydrolases; Esterases; Hydrolases</FG>
<ED>Abscission; Lipids; Pyrazole derivatives; Fruit; Root; Development; Mitochondria; Chloroplast; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Plant leaf; Phospholipase A<sub>2</sub>
; Lipoxygenase; Senescence</ED>
<EG>Oxidoreductases; Enzyme; Rutaceae; Dicotyledones; Angiospermae; Spermatophyta; Cruciferae; Leguminosae; Carboxylic ester hydrolases; Esterases; Hydrolases</EG>
<SD>Abscisión; Lípido; Pirazol derivado; Fruto; Raíz; Desarrollo; Mitocondria; Cloroplasto; Alcohol dehydrogenase; Citrus sinensis; Arabidopsis thaliana; Glycine max; Pisum sativum; Oxidase; ATP; Hoja vegetal; Phospholipase A<sub>2</sub>
; Lipoxygenase; Senescencia</SD>
<LO>INIST-17987.354000132558400090</LO>
<ID>05-0487640</ID>
</server>
</inist>
</record>

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Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling

Citrus abscission and Arabidopsis plant decline in response to 5-chloro-3-methyl-4-nitro-1H-pyrazole are mediated by lipid signalling

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