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Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges

Identifieur interne : 000485 ( PascalFrancis/Corpus ); précédent : 000484; suivant : 000486

Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges

Auteurs : Frederick S. Davies ; Glenn Zalman

Source :

RBID : Pascal:07-0272520

Descripteurs français

English descriptors

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.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

pA  
A01 01  1    @0 0018-5345
A02 01      @0 HJHSAR
A03   1    @0 HortScience
A05       @2 42
A06       @2 3
A08 01  1  ENG  @1 Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges
A11 01  1    @1 DAVIES (Frederick S.)
A11 02  1    @1 ZALMAN (Glenn)
A14 01      @1 Department of Horticultural Sciences, University of Florida, P.O. Box 110690 @2 Gainesville, FL 32611 @3 USA @Z 1 aut. @Z 2 aut.
A20       @1 565-570
A21       @1 2007
A23 01      @0 ENG
A43 01      @1 INIST @2 13300 @5 354000162240580220
A44       @0 0000 @1 © 2007 INIST-CNRS. All rights reserved.
A45       @0 1/4 p.
A47 01  1    @0 07-0272520
A60       @1 P
A61       @0 A
A64 01  1    @0 HortScience
A66 01      @0 USA
C01 01    ENG  @0 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.
C02 01  X    @0 002A32
C03 01  X  FRE  @0 Porte greffe @5 01
C03 01  X  ENG  @0 Rootstock @5 01
C03 01  X  SPA  @0 Portainjerto @5 01
C03 02  X  FRE  @0 Gel @5 02
C03 02  X  ENG  @0 Freeze @5 02
C03 02  X  SPA  @0 Helada @5 02
C03 03  X  FRE  @0 Qualité production @5 03
C03 03  X  ENG  @0 Production quality @5 03
C03 03  X  SPA  @0 Calidad producción @5 03
C03 04  X  FRE  @0 Fruit @5 04
C03 04  X  ENG  @0 Fruit @5 04
C03 04  X  SPA  @0 Fruto @5 04
C03 05  X  FRE  @0 Résistance froid @5 05
C03 05  X  ENG  @0 Cold resistance @5 05
C03 05  X  SPA  @0 Resistencia frío @5 05
C03 06  X  FRE  @0 Résistance gel @5 06
C03 06  X  ENG  @0 Frost resistance @5 06
C03 06  X  SPA  @0 Resistencia hielo @5 06
C03 07  X  FRE  @0 Horticulture @5 07
C03 07  X  ENG  @0 Horticulture @5 07
C03 07  X  SPA  @0 Horticultura @5 07
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C03 08  X  ENG  @0 Rutaceae @2 NS @5 08
C03 08  X  SPA  @0 Rutaceae @2 NS @5 08
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C03 09  X  SPA  @0 Citrus sinensis @2 NS @5 10
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C03 10  X  ENG  @0 Gibberellic acid @2 NK @2 FR @2 FF @5 15
C03 10  X  SPA  @0 Giberelico ácido @2 NK @2 FR @2 FF @5 15
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C03 11  X  ENG  @0 Orange @5 16
C03 11  X  SPA  @0 Naranja @5 16
C03 12  X  FRE  @0 Substance croissance végétal @5 17
C03 12  X  ENG  @0 Plant growth substance @5 17
C03 12  X  SPA  @0 Substancia crecimiento vegetal @5 17
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C07 03  X  ENG  @0 Spermatophyta @2 NS
C07 03  X  SPA  @0 Spermatophyta @2 NS
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C07 04  X  ENG  @0 Fruit tree @5 31
C07 04  X  SPA  @0 Arbol frutal @5 31
C07 05  X  FRE  @0 Agrume @5 32
C07 05  X  ENG  @0 Citrus fruit @5 32
C07 05  X  SPA  @0 Agrios @5 32
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C07 06  X  ENG  @0 Fruit crop @5 39
C07 06  X  SPA  @0 Planta frutal @5 39
C07 07  X  FRE  @0 Gibbérelline @2 FF @5 50
C07 07  X  ENG  @0 Gibberellin @2 FF @5 50
C07 07  X  SPA  @0 Giberelina @2 FF @5 50
C07 08  X  FRE  @0 Terpénoïde @2 FX @5 51
C07 08  X  ENG  @0 Terpenoid @2 FX @5 51
C07 08  X  SPA  @0 Terpenoide @2 FX @5 51
C07 09  X  FRE  @0 Composé organique @2 NA @5 52
C07 09  X  ENG  @0 Organic compounds @2 NA @5 52
C07 09  X  SPA  @0 Compuesto orgánico @2 NA @5 52
C07 10  X  FRE  @0 Isoprénoïde @5 53
C07 10  X  ENG  @0 Isoprenoid @5 53
C07 10  X  SPA  @0 Isoprenoide @5 53
N21       @1 183
N44 01      @1 OTO
N82       @1 OTO

Format Inist (serveur)

NO : PASCAL 07-0272520 INIST
ET : Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges
AU : DAVIES (Frederick S.); ZALMAN (Glenn)
AF : Department of Horticultural Sciences, University of Florida, P.O. Box 110690/Gainesville, FL 32611/Etats-Unis (1 aut., 2 aut.)
DT : Publication en série; Niveau analytique
SO : HortScience; ISSN 0018-5345; Coden HJHSAR; Etats-Unis; Da. 2007; Vol. 42; No. 3; Pp. 565-570; Bibl. 1/4 p.
LA : Anglais
EA : 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.
CC : 002A32
FD : Porte greffe; Gel; Qualité production; Fruit; Résistance froid; Résistance gel; Horticulture; Rutaceae; Citrus sinensis; Gibbérellique acide; Orange; Substance croissance végétal
FG : Dicotyledones; Angiospermae; Spermatophyta; Arbre fruitier; Agrume; Plante fruitière; Gibbérelline; Terpénoïde; Composé organique; Isoprénoïde
ED : Rootstock; Freeze; Production quality; Fruit; Cold resistance; Frost resistance; Horticulture; Rutaceae; Citrus sinensis; Gibberellic acid; Orange; Plant growth substance
EG : Dicotyledones; Angiospermae; Spermatophyta; Fruit tree; Citrus fruit; Fruit crop; Gibberellin; Terpenoid; Organic compounds; Isoprenoid
SD : Portainjerto; Helada; Calidad producción; Fruto; Resistencia frío; Resistencia hielo; Horticultura; Rutaceae; Citrus sinensis; Giberelico ácido; Naranja; Substancia crecimiento vegetal
LO : INIST-13300.354000162240580220
ID : 07-0272520

Links to Exploration step

Pascal:07-0272520

Le document en format XML

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<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>
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<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>
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<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
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</fC03>
<fC03 i1="04" i2="X" l="SPA">
<s0>Fruto</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Résistance froid</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Cold resistance</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Resistencia frío</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Résistance gel</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Frost resistance</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Resistencia hielo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Horticulture</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Horticulture</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Horticultura</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE">
<s0>Rutaceae</s0>
<s2>NS</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG">
<s0>Rutaceae</s0>
<s2>NS</s2>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA">
<s0>Rutaceae</s0>
<s2>NS</s2>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG">
<s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Citrus sinensis</s0>
<s2>NS</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE">
<s0>Gibbérellique acide</s0>
<s2>NK</s2>
<s2>FR</s2>
<s2>FF</s2>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG">
<s0>Gibberellic acid</s0>
<s2>NK</s2>
<s2>FR</s2>
<s2>FF</s2>
<s5>15</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA">
<s0>Giberelico ácido</s0>
<s2>NK</s2>
<s2>FR</s2>
<s2>FF</s2>
<s5>15</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE">
<s0>Orange</s0>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG">
<s0>Orange</s0>
<s5>16</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA">
<s0>Naranja</s0>
<s5>16</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Substance croissance végétal</s0>
<s5>17</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Plant growth substance</s0>
<s5>17</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Substancia crecimiento vegetal</s0>
<s5>17</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="ENG">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="01" i2="X" l="SPA">
<s0>Dicotyledones</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="FRE">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="ENG">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="02" i2="X" l="SPA">
<s0>Angiospermae</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="FRE">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="ENG">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="03" i2="X" l="SPA">
<s0>Spermatophyta</s0>
<s2>NS</s2>
</fC07>
<fC07 i1="04" i2="X" l="FRE">
<s0>Arbre fruitier</s0>
<s5>31</s5>
</fC07>
<fC07 i1="04" i2="X" l="ENG">
<s0>Fruit tree</s0>
<s5>31</s5>
</fC07>
<fC07 i1="04" i2="X" l="SPA">
<s0>Arbol frutal</s0>
<s5>31</s5>
</fC07>
<fC07 i1="05" i2="X" l="FRE">
<s0>Agrume</s0>
<s5>32</s5>
</fC07>
<fC07 i1="05" i2="X" l="ENG">
<s0>Citrus fruit</s0>
<s5>32</s5>
</fC07>
<fC07 i1="05" i2="X" l="SPA">
<s0>Agrios</s0>
<s5>32</s5>
</fC07>
<fC07 i1="06" i2="X" l="FRE">
<s0>Plante fruitière</s0>
<s5>39</s5>
</fC07>
<fC07 i1="06" i2="X" l="ENG">
<s0>Fruit crop</s0>
<s5>39</s5>
</fC07>
<fC07 i1="06" i2="X" l="SPA">
<s0>Planta frutal</s0>
<s5>39</s5>
</fC07>
<fC07 i1="07" i2="X" l="FRE">
<s0>Gibbérelline</s0>
<s2>FF</s2>
<s5>50</s5>
</fC07>
<fC07 i1="07" i2="X" l="ENG">
<s0>Gibberellin</s0>
<s2>FF</s2>
<s5>50</s5>
</fC07>
<fC07 i1="07" i2="X" l="SPA">
<s0>Giberelina</s0>
<s2>FF</s2>
<s5>50</s5>
</fC07>
<fC07 i1="08" i2="X" l="FRE">
<s0>Terpénoïde</s0>
<s2>FX</s2>
<s5>51</s5>
</fC07>
<fC07 i1="08" i2="X" l="ENG">
<s0>Terpenoid</s0>
<s2>FX</s2>
<s5>51</s5>
</fC07>
<fC07 i1="08" i2="X" l="SPA">
<s0>Terpenoide</s0>
<s2>FX</s2>
<s5>51</s5>
</fC07>
<fC07 i1="09" i2="X" l="FRE">
<s0>Composé organique</s0>
<s2>NA</s2>
<s5>52</s5>
</fC07>
<fC07 i1="09" i2="X" l="ENG">
<s0>Organic compounds</s0>
<s2>NA</s2>
<s5>52</s5>
</fC07>
<fC07 i1="09" i2="X" l="SPA">
<s0>Compuesto orgánico</s0>
<s2>NA</s2>
<s5>52</s5>
</fC07>
<fC07 i1="10" i2="X" l="FRE">
<s0>Isoprénoïde</s0>
<s5>53</s5>
</fC07>
<fC07 i1="10" i2="X" l="ENG">
<s0>Isoprenoid</s0>
<s5>53</s5>
</fC07>
<fC07 i1="10" i2="X" l="SPA">
<s0>Isoprenoide</s0>
<s5>53</s5>
</fC07>
<fN21>
<s1>183</s1>
</fN21>
<fN44 i1="01">
<s1>OTO</s1>
</fN44>
<fN82>
<s1>OTO</s1>
</fN82>
</pA>
</standard>
<server>
<NO>PASCAL 07-0272520 INIST</NO>
<ET>Gibberellic acid, rootstocks, and post-freeze fruit quality of 'rohde red' valencia oranges</ET>
<AU>DAVIES (Frederick S.); ZALMAN (Glenn)</AU>
<AF>Department of Horticultural Sciences, University of Florida, P.O. Box 110690/Gainesville, FL 32611/Etats-Unis (1 aut., 2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>HortScience; ISSN 0018-5345; Coden HJHSAR; Etats-Unis; Da. 2007; Vol. 42; No. 3; Pp. 565-570; Bibl. 1/4 p.</SO>
<LA>Anglais</LA>
<EA>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.</EA>
<CC>002A32</CC>
<FD>Porte greffe; Gel; Qualité production; Fruit; Résistance froid; Résistance gel; Horticulture; Rutaceae; Citrus sinensis; Gibbérellique acide; Orange; Substance croissance végétal</FD>
<FG>Dicotyledones; Angiospermae; Spermatophyta; Arbre fruitier; Agrume; Plante fruitière; Gibbérelline; Terpénoïde; Composé organique; Isoprénoïde</FG>
<ED>Rootstock; Freeze; Production quality; Fruit; Cold resistance; Frost resistance; Horticulture; Rutaceae; Citrus sinensis; Gibberellic acid; Orange; Plant growth substance</ED>
<EG>Dicotyledones; Angiospermae; Spermatophyta; Fruit tree; Citrus fruit; Fruit crop; Gibberellin; Terpenoid; Organic compounds; Isoprenoid</EG>
<SD>Portainjerto; Helada; Calidad producción; Fruto; Resistencia frío; Resistencia hielo; Horticultura; Rutaceae; Citrus sinensis; Giberelico ácido; Naranja; Substancia crecimiento vegetal</SD>
<LO>INIST-13300.354000162240580220</LO>
<ID>07-0272520</ID>
</server>
</inist>
</record>

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