Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges
Identifieur interne : 002461 ( Main/Curation ); précédent : 002460; suivant : 002462Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges
Auteurs : Frederick S. Davies [États-Unis] ; Glenn Zalman [États-Unis]Source :
- HortScience [ 0018-5345 ] ; 2007.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Fruit, Horticulture.
English descriptors
- KwdEn :
Abstract
The authors' objectives were to determine whether gibberellic acid (GA3) initially increases juice content of 'Rohde Red' valencia oranges and prevents or delays decreases in juice content after a freeze, and to determine whether there is an interaction between GA3, rootstock, and juice content. The experiment consisted of a 2 (+, -GA3) x 3 (rootstock) factorial using a completely randomized design with 10 replications per treatment. Gibberellic acid was applied to mature 'Rohde Red' valencia [Citrus sinensis (L.) Osb.] orange trees on three rootstocks-Citrus volkameriana Ten. & Pasq.(Volk), Swingle citumelo [C. paradisi Macf. xPoncirus trifoliata (L.) Raf.], and Carrizo citrange [C. sinensis xP. trifoliata]-at color break in Fall 2002, 2003, and 2004. Juice content, soluble solids content (SSC), titratable acidity (TA), ratio of SSC to TA, and kilogram solids per box were determined at about 2-week intervals after several freezes. In 2002-03 and 2004-05, juice content in the fall was greater and the rate of decrease in juice content lower for GA3-treated fruit than nontreated fruit for about 8 weeks after a freeze. In contrast, in 2003-04, juice content and rate of decrease in juice content were not different between treatments. Juice content was lower for fruit from 'Rohde Red' trees on Volk compared with those on Carrizo and Swingle, and more important, the rate of decrease in juice content after a freeze was greatest for trees on Volk in all three seasons. Soluble solids content, TA, SSC-to-TA ratio, and kilogram solids generally were not effected by GA3 treatment. Therefore, GA3 application at color break in the fall generally increased juice content and slowed the rate of decrease in juice content after a freeze compared with nontreated fruit. In addition, juice content differed significantly with rootstock, but there was no GA3 x rootstock interaction.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges</title><author><name sortKey="Davies, Frederick S" sort="Davies, Frederick S" uniqKey="Davies F" first="Frederick S." last="Davies">Frederick S. Davies</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Horticultural Sciences, University of Florida, P.O. Box 110690</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Zalman, Glenn" sort="Zalman, Glenn" uniqKey="Zalman G" first="Glenn" last="Zalman">Glenn Zalman</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Horticultural Sciences, University of Florida, P.O. Box 110690</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">07-0272520</idno><date when="2007">2007</date><idno type="stanalyst">PASCAL 07-0272520 INIST</idno><idno type="RBID">Pascal:07-0272520</idno><idno type="wicri:Area/PascalFrancis/Corpus">000485</idno><idno type="wicri:Area/PascalFrancis/Curation">000519</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000461</idno><idno type="wicri:doubleKey">0018-5345:2007:Davies F:gibberellic:acid:rootstocks</idno><idno type="wicri:Area/Main/Merge">002551</idno><idno type="wicri:Area/Main/Curation">002461</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges</title><author><name sortKey="Davies, Frederick S" sort="Davies, Frederick S" uniqKey="Davies F" first="Frederick S." last="Davies">Frederick S. Davies</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Horticultural Sciences, University of Florida, P.O. Box 110690</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author><author><name sortKey="Zalman, Glenn" sort="Zalman, Glenn" uniqKey="Zalman G" first="Glenn" last="Zalman">Glenn Zalman</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Horticultural Sciences, University of Florida, P.O. Box 110690</s1><s2>Gainesville, FL 32611</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Floride</region></placeName></affiliation></author></analytic><series><title level="j" type="main">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">HortScience</title><title level="j" type="abbreviated">HortScience</title><idno type="ISSN">0018-5345</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus sinensis</term><term>Cold resistance</term><term>Freeze</term><term>Frost resistance</term><term>Fruit</term><term>Gibberellic acid</term><term>Horticulture</term><term>Orange</term><term>Plant growth substance</term><term>Production quality</term><term>Rootstock</term><term>Rutaceae</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Porte greffe</term><term>Gel</term><term>Qualité production</term><term>Fruit</term><term>Résistance froid</term><term>Résistance gel</term><term>Horticulture</term><term>Rutaceae</term><term>Citrus sinensis</term><term>Gibbérellique acide</term><term>Orange</term><term>Substance croissance végétal</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Fruit</term><term>Horticulture</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The authors' objectives were to determine whether gibberellic acid (GA<sub>3</sub>) initially increases juice content of 'Rohde Red' valencia oranges and prevents or delays decreases in juice content after a freeze, and to determine whether there is an interaction between GA<sub>3</sub>, rootstock, and juice content. The experiment consisted of a 2 (+, -GA<sub>3</sub>) x 3 (rootstock) factorial using a completely randomized design with 10 replications per treatment. Gibberellic acid was applied to mature 'Rohde Red' valencia [Citrus sinensis (L.) Osb.] orange trees on three rootstocks-Citrus volkameriana Ten. & Pasq.(Volk), Swingle citumelo [C. paradisi Macf. xPoncirus trifoliata (L.) Raf.], and Carrizo citrange [C. sinensis xP. trifoliata]-at color break in Fall 2002, 2003, and 2004. Juice content, soluble solids content (SSC), titratable acidity (TA), ratio of SSC to TA, and kilogram solids per box were determined at about 2-week intervals after several freezes. In 2002-03 and 2004-05, juice content in the fall was greater and the rate of decrease in juice content lower for GA<sub>3</sub>-treated fruit than nontreated fruit for about 8 weeks after a freeze. In contrast, in 2003-04, juice content and rate of decrease in juice content were not different between treatments. Juice content was lower for fruit from 'Rohde Red' trees on Volk compared with those on Carrizo and Swingle, and more important, the rate of decrease in juice content after a freeze was greatest for trees on Volk in all three seasons. Soluble solids content, TA, SSC-to-TA ratio, and kilogram solids generally were not effected by GA<sub>3</sub> treatment. Therefore, GA<sub>3</sub> application at color break in the fall generally increased juice content and slowed the rate of decrease in juice content after a freeze compared with nontreated fruit. In addition, juice content differed significantly with rootstock, but there was no GA<sub>3</sub> x rootstock interaction.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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