Postharvest calyx retention of citrus fruit
Identifieur interne : 002823 ( Main/Exploration ); précédent : 002822; suivant : 002824Postharvest calyx retention of citrus fruit
Auteurs : P. J. R. Cronje [Afrique du Sud] ; E. M. Crouch [Afrique du Sud] ; M. Huysamer [Afrique du Sud]Source :
- Acta horticulturae [ 0567-7572 ] ; 2005.
Descripteurs français
- Pascal (Inist)
- Agrume, Orange, Calice, Rétention, Après récolte, Régulation hormonale, Traitement substance croissance, Abscission, Qualité production, Citrus sinensis, Fruit, 2,4-D, Naphtalène-1-acétique acide, Ethylène, Inhibiteur métabolique, Antagoniste, Cyclopropène(1-méthyl), But-3-énoïque acide(2-amino-4-[2-aminoéthoxy]).
- Wicri :
English descriptors
- KwdEn :
Abstract
Abscission is an active developmental process occurring at the abscission zone of the fruit peduncle. The target cells in the abscission zone, which are involved in the process of separation, are located in the separation layer, which is organized in a few cellular layers. In general, it is accepted that the increase in ethylene production in the fruit is followed by increased sensitivity of these cells to ethylene, which would lead to abscission. The abscission process is divided into two phases with respect to sensitivity to auxin and ethylene. The auxin, 2,4-D (2,4-dichlorophenoxy acetic acid), has been used as a postharvest packhouse treatment to retard calyx abscission (to repress postharvest decay). Commercially the sodium salt 2,4-D (Deccomone®) is applied to the fruit in a dip treatment at 500 ppm. The aim of this experiment was to test three agrochemicals (aminoethoxyvinylglycine (AVG), 1-naphthylacetic acid (NAA) and 1-methylcyclopropene (1-MCP)) that could possibly replace the postharvest application of the auxin 2,4-D. AVG had a fruit firming effect but no significant effect on calyx retention. NAA resulted in a high percentage of abscission, probably due to auxin overdose. The 1-MCP at low concentrations of 100 ppb and 250 ppb resulted in calyx retention but had a desiccating effect on the calyx whereas at a high concentration of 500 ppb there was a significant increase in calyx abscission. There was no loss of internal quality or colour. To conclude, according to what is known about the role of ethylene in abscission, 1-MCP and AVG should have prevented abscission of the calyx. Unfortunately, the results show that this complex plant mechanism is not so readily manipulated and 2,4-D remains the best product to inhibit calyx abscission of citrus fruit.
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Crouch</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Horticultural Science University of Stellenbosch</s1><s3>ZAF</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Department of Horticultural Science University of Stellenbosch</wicri:noRegion></affiliation></author><author><name sortKey="Huysamer, M" sort="Huysamer, M" uniqKey="Huysamer M" first="M." last="Huysamer">M. Huysamer</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Horticultural Science University of Stellenbosch</s1><s3>ZAF</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Department of Horticultural Science University of Stellenbosch</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">06-0018797</idno><date when="2005">2005</date><idno type="stanalyst">PASCAL 06-0018797 INIST</idno><idno type="RBID">Pascal:06-0018797</idno><idno type="wicri:Area/PascalFrancis/Corpus">000598</idno><idno type="wicri:Area/PascalFrancis/Curation">000406</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000588</idno><idno type="wicri:doubleKey">0567-7572:2005:Cronje P:postharvest:calyx:retention</idno><idno type="wicri:Area/Main/Merge">002944</idno><idno type="wicri:Area/Main/Curation">002823</idno><idno type="wicri:Area/Main/Exploration">002823</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Postharvest calyx retention of citrus fruit</title><author><name sortKey="Cronje, P J R" sort="Cronje, P J R" uniqKey="Cronje P" first="P. J. R." last="Cronje">P. J. R. Cronje</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Citrus Research International Department of Horticultural Science University of Stellenbosch</s1><s3>ZAF</s3><sZ>1 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Citrus Research International Department of Horticultural Science University of Stellenbosch</wicri:noRegion></affiliation></author><author><name sortKey="Crouch, E M" sort="Crouch, E M" uniqKey="Crouch E" first="E. M." last="Crouch">E. M. Crouch</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Horticultural Science University of Stellenbosch</s1><s3>ZAF</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Department of Horticultural Science University of Stellenbosch</wicri:noRegion></affiliation></author><author><name sortKey="Huysamer, M" sort="Huysamer, M" uniqKey="Huysamer M" first="M." last="Huysamer">M. Huysamer</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Horticultural Science University of Stellenbosch</s1><s3>ZAF</s3><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Afrique du Sud</country><wicri:noRegion>Department of Horticultural Science University of Stellenbosch</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Acta horticulturae</title><idno type="ISSN">0567-7572</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Acta horticulturae</title><idno type="ISSN">0567-7572</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>1-Naphthaleneacetic acid</term><term>2,4-D</term><term>Abscission</term><term>Antagonist</term><term>Calyx</term><term>Citrus fruit</term><term>Citrus sinensis</term><term>Ethylene</term><term>Fruit</term><term>Growth regulator treatment</term><term>Hormonal regulation</term><term>Metabolic inhibitor</term><term>Orange</term><term>Postharvest</term><term>Production quality</term><term>Retention</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Agrume</term><term>Orange</term><term>Calice</term><term>Rétention</term><term>Après récolte</term><term>Régulation hormonale</term><term>Traitement substance croissance</term><term>Abscission</term><term>Qualité production</term><term>Citrus sinensis</term><term>Fruit</term><term>2,4-D</term><term>Naphtalène-1-acétique acide</term><term>Ethylène</term><term>Inhibiteur métabolique</term><term>Antagoniste</term><term>Cyclopropène(1-méthyl)</term><term>But-3-énoïque acide(2-amino-4-[2-aminoéthoxy])</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Agrume</term><term>Fruit</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abscission is an active developmental process occurring at the abscission zone of the fruit peduncle. The target cells in the abscission zone, which are involved in the process of separation, are located in the separation layer, which is organized in a few cellular layers. In general, it is accepted that the increase in ethylene production in the fruit is followed by increased sensitivity of these cells to ethylene, which would lead to abscission. The abscission process is divided into two phases with respect to sensitivity to auxin and ethylene. The auxin, 2,4-D (2,4-dichlorophenoxy acetic acid), has been used as a postharvest packhouse treatment to retard calyx abscission (to repress postharvest decay). Commercially the sodium salt 2,4-D (Deccomone®) is applied to the fruit in a dip treatment at 500 ppm. The aim of this experiment was to test three agrochemicals (aminoethoxyvinylglycine (AVG), 1-naphthylacetic acid (NAA) and 1-methylcyclopropene (1-MCP)) that could possibly replace the postharvest application of the auxin 2,4-D. AVG had a fruit firming effect but no significant effect on calyx retention. NAA resulted in a high percentage of abscission, probably due to auxin overdose. The 1-MCP at low concentrations of 100 ppb and 250 ppb resulted in calyx retention but had a desiccating effect on the calyx whereas at a high concentration of 500 ppb there was a significant increase in calyx abscission. There was no loss of internal quality or colour. To conclude, according to what is known about the role of ethylene in abscission, 1-MCP and AVG should have prevented abscission of the calyx. Unfortunately, the results show that this complex plant mechanism is not so readily manipulated and 2,4-D remains the best product to inhibit calyx abscission of citrus fruit.</div></front></TEI><affiliations><list><country><li>Afrique du Sud</li></country></list><tree><country name="Afrique du Sud"><noRegion><name sortKey="Cronje, P J R" sort="Cronje, P J R" uniqKey="Cronje P" first="P. J. R." last="Cronje">P. J. R. Cronje</name></noRegion><name sortKey="Crouch, E M" sort="Crouch, E M" uniqKey="Crouch E" first="E. M." last="Crouch">E. M. Crouch</name><name sortKey="Huysamer, M" sort="Huysamer, M" uniqKey="Huysamer M" first="M." last="Huysamer">M. Huysamer</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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