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Regulation by Carbon Dioxide of Wound-induced Ethylene Biosynthesis in the Peel of Citrus Fruit

Identifieur interne : 002435 ( Main/Curation ); précédent : 002434; suivant : 002436

Regulation by Carbon Dioxide of Wound-induced Ethylene Biosynthesis in the Peel of Citrus Fruit

Auteurs : L. Zacarias [Espagne] ; F. Alferez [Espagne]

Source :

Food science and technology international [ 1082-0132 ] ; 2007.

RBID : Pascal:08-0213358

Descripteurs français

Pascal (Inist)
- Dioxyde de carbone, Blessure, Ethylène, Biosynthèse, Pelure, Agrume, Acide carboxylique, Orange.
Wicri :
- topic : Agrume.

English descriptors

KwdEn :
- Biosynthesis, Carbon dioxide, Carboxylic acid, Citrus fruit, Ethylene, Injury, Orange, Peel.

Abstract

The effect of carbon dioxide (CO₂) on wound-induced ethylene biosynthesis in flavedo discs of mature orange fruits (Citrus sinensis L. Osbeck) is investigated. Wounding induced a marked and rapid increase on the rate of ethylene production, the content of 1-aminocyclopropane-1-carboxylic acid (ACC) and on the in vivo ACC oxidase (ACO) activity. Incubation of flavedo discs in a 15% CO₂ atmosphere suppressed activation of these processes. Wound-induced ethylene production was inhibited by CO₂ in a concentration-dependent manner but ACO activity was enhanced at concentrations between 1% and 5%. Kinetic analysis of the interaction between CO₂ and ACO activity indicated that high CO₂ acted as a noncompetitive inhibitor. Removal of CO₂ after 24 h incubation did not restore normal rates of ethylene production. CO₂ partially counteracted the increase in ethylene production and ACO activity induced by a pretreatment with an ethylene action inhibitor (STS, silver thiosulfate). This suggested that part of CO₂ action on ethylene biosynthesis might be due to interfering ethylene action. Collectively, the results indicated that ACS activity appeared to be the major regulatory step by which CO₂ suppresses wound-induced ethylene production. ACO was differentially modulated by CO₂, which is being stimulated at low concentrations and inhibited at high concentrations.

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Le document en format XML

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<author><name sortKey="Zacarias, L" sort="Zacarias, L" uniqKey="Zacarias L" first="L." last="Zacarias">L. Zacarias</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Instituto de Agroquímica y Tecnología de Alimentos. Consejo Superior de Investigaciones Científicas (CSIC), PO Box 73</s1>
<s2>46100 Burjassot, Valencia</s2>
<s3>ESP</s3>
<sZ>1 aut.</sZ>
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<country>Espagne</country>
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<author><name sortKey="Alferez, F" sort="Alferez, F" uniqKey="Alferez F" first="F." last="Alferez">F. Alferez</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Instituto de Agroquímica y Tecnología de Alimentos. Consejo Superior de Investigaciones Científicas (CSIC), PO Box 73</s1>
<s2>46100 Burjassot, Valencia</s2>
<s3>ESP</s3>
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<country>Espagne</country>
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<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Instituto de Agroquímica y Tecnología de Alimentos. Consejo Superior de Investigaciones Científicas (CSIC), PO Box 73</s1>
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<s3>ESP</s3>
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<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Instituto de Agroquímica y Tecnología de Alimentos. Consejo Superior de Investigaciones Científicas (CSIC), PO Box 73</s1>
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<s3>ESP</s3>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biosynthesis</term>
<term>Carbon dioxide</term>
<term>Carboxylic acid</term>
<term>Citrus fruit</term>
<term>Ethylene</term>
<term>Injury</term>
<term>Orange</term>
<term>Peel</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Dioxyde de carbone</term>
<term>Blessure</term>
<term>Ethylène</term>
<term>Biosynthèse</term>
<term>Pelure</term>
<term>Agrume</term>
<term>Acide carboxylique</term>
<term>Orange</term>
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<front><div type="abstract" xml:lang="en">The effect of carbon dioxide (CO<sub>2</sub>
) on wound-induced ethylene biosynthesis in flavedo discs of mature orange fruits (Citrus sinensis L. Osbeck) is investigated. Wounding induced a marked and rapid increase on the rate of ethylene production, the content of 1-aminocyclopropane-1-carboxylic acid (ACC) and on the in vivo ACC oxidase (ACO) activity. Incubation of flavedo discs in a 15% CO<sub>2</sub>
 atmosphere suppressed activation of these processes. Wound-induced ethylene production was inhibited by CO<sub>2</sub>
 in a concentration-dependent manner but ACO activity was enhanced at concentrations between 1% and 5%. Kinetic analysis of the interaction between CO<sub>2</sub>
 and ACO activity indicated that high CO<sub>2</sub>
 acted as a noncompetitive inhibitor. Removal of CO<sub>2</sub>
 after 24 h incubation did not restore normal rates of ethylene production. CO<sub>2</sub>
 partially counteracted the increase in ethylene production and ACO activity induced by a pretreatment with an ethylene action inhibitor (STS, silver thiosulfate). This suggested that part of CO<sub>2</sub>
 action on ethylene biosynthesis might be due to interfering ethylene action. Collectively, the results indicated that ACS activity appeared to be the major regulatory step by which CO<sub>2</sub>
 suppresses wound-induced ethylene production. ACO was differentially modulated by CO<sub>2</sub>
, which is being stimulated at low concentrations and inhibited at high concentrations.</div>
</front>
</TEI>
</record>

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Regulation by Carbon Dioxide of Wound-induced Ethylene Biosynthesis in the Peel of Citrus Fruit

Regulation by Carbon Dioxide of Wound-induced Ethylene Biosynthesis in the Peel of Citrus Fruit

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri