Fertile fruit trees obtained by somatic hybridization: navel orange (Citrus sinensis) and Troyer citrange (C. sinensis x Poncirus trifoliata)

This investigation was carried out on 13-year-old Valencia orange trees [Citrus sinensis (L.) Osbeck] budded on five different rootstocks. Heat unit accumulation (temperature above 12.5 °C) for fruits worked on the various rootstocks were calculated from full bloom to maturity stage. Valencia fruits on Troyer citrange (C. sinensis × Poncirus trifoliata) and Carrizo citrange (C. sinensis × Poncirus trifoliata) rootstocks matured earlier when compared to those growing on Cleopatra mandarin (C. reticulata Blanco), Volkamer lemon (C. volkameriana Ten. and Pasq.), and sour orange (C. aurantium) rootstocks. The results showed that the Valencia fruits, regardless of rootstock, could be stored for different periods under different conditions. However, in order to avoid degradation in fruit quality, storing periods should not exceed 21, 60, and 120 days under room conditions (25 °C and RH 25% to 35%), 4 °C (RH 80% to 85%), and 8 °C (RH 80% to 85%); respectively.

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Screening Hybrid Citrus Rootstocks for Resistance to Tylenchulus semipenetrans Cobb

HortScience ◽

10.21273/hortsci.32.6.1116 ◽

1997 ◽

Vol 32 (6) ◽

pp. 1116-1119 ◽

Cited By ~ 5

Author(s):

S. Verdejo-Lucas ◽

F.J. Sorribas ◽

J.B. Forner ◽

A. Alcaide

Keyword(s):

Citrus Sinensis ◽

Poncirus Trifoliata ◽

Nematode Reproduction ◽

Greenhouse Test ◽

Tylenchulus Semipenetrans ◽

Troyer Citrange

The response of 22 citrus hybrid rootstocks to a Mediterranean biotype of Tylenchulus semipenetrans Cobb was determined in a greenhouse test. Five of the 11 rootstocks with Poncirus trifoliata (L.) Raf in their parentage did not support nematode reproduction. However, rootstocks with Troyer citrange [Citrus sinensis (L.) Osbeck × P. trifoliata (L.) Raf] in their parentage were susceptible to the nematode.

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Effect of Rootstock on Stem-end Rind Breakdown and Decay of Fresh Citrus

HortTechnology ◽

10.21273/horttech.14.3.0315 ◽

2004 ◽

Vol 14 (3) ◽

pp. 315-319 ◽

Cited By ~ 10

Author(s):

Mark A. Ritenour ◽

Ed Stover ◽

Brian J. Boman ◽

Huating Dou ◽

Kim D. Bowman ◽

...

Keyword(s):

Citrus Sinensis ◽

Poncirus Trifoliata ◽

Navel Orange ◽

Fresh Market ◽

Postharvest Decay ◽

Valencia Orange ◽

Quality Retention ◽

Low Levels ◽

Cleopatra Mandarin

Rootstock significantly affected the development of stem-end rind breakdown (SERB) on `Valencia' and navel oranges (Citrus sinensis), but not `Ray Ruby' grapefruit (C. paradisi) or `Oroblanco' (C. grandis × C. paradisi), and affected postharvest decay on navel orange, `Ray Ruby' grapefruit, `Oroblanco' and one of two seasons (2002) on `Valencia' orange. In `Valencia' and navel oranges, fruit from trees grown on Gou Tou (unidentified Citrus hybrid) consistently developed low SERB. `Valencia' oranges on US-952 [(C. paradisi × C. reticulata) × Poncirus trifoliata] developed high levels of SERB in both years tested. Relative SERB of fruit from other rootstocks was more variable. Navel oranges, `Ray Ruby' grapefruit, and `Oroblanco' fruit from trees on Cleopatra mandarin (C. reticulata) rootstock consistently developed relatively low levels of decay, and in navel this level was significantly lower than observed from trees on all other rootstocks. In three of five trials we observed significant differences between widely used commercial rootstocks in their effects on postharvest SERB and/or decay. Given the expanding importance of sales to distant markets, it is suggested that evaluations of quality retention during storage be included when developing citrus rootstocks and scion varieties for the fresh market.

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Metabolic Contributors to Drought-enhanced Accumulation of Sugars and Acids in Oranges

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.126.5.599 ◽

2001 ◽

Vol 126 (5) ◽

pp. 599-605 ◽

Cited By ~ 38

Author(s):

Brandon R. Hockema ◽

Ed Etxeberria

Keyword(s):

Drought Stress ◽

Citrus Sinensis ◽

Soluble Sugar ◽

Poncirus Trifoliata ◽

Sink Strength ◽

Quality Indices ◽

Orange Fruit ◽

Stem Water ◽

Mild Drought ◽

Troyer Citrange

The nature of sink strength in orange fruit and changes occurring during drought stress were investigated. Potted trees of `Hamlin' orange [Citrus sinensis (L.) Osbeck] grafted on Troyer citrange [Citrus sinensis × Poncirus trifoliata (L.) Raf.] were irrigated using a microsprinkler system creating either well-watered or water-stressed conditions, as determined by stem water potentials. Fruit were harvested every other week from trees of both well-watered and drought-stressed treatments during the final stage of fruit development when sugars accumulate rapidly. Fruit quality indices and activities of sucrose synthase (SuSy), invertase, sucrose-P synthase, sucrose-P phosphatase, V-ATPase, and V-PPase were measured. Acids and soluble sugar concentrations were elevated in drought-stressed fruit, whereas juice pH decreased in those same fruit. Results indicate that increased sink strength in fruit from stressed trees was accompanied by an increase in SuSy activity and lowered juice pH. The remaining enzymes examined in this experiment showed no changes in activity between control and treated fruit, as was the case for plasmalemma and tonoplast sucrose carriers. Based on the present data, we conclude that SuSy and vacuolar pH are the predominant factors controlling photoassimilate accumulation in orange fruit under enhanced sink conditions brought about by imposition of a mild drought stress.

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Effects of potassium on fruit soluble sugar and citrate accumulations in Cara Cara navel orange (Citrus sinensis L. Osbeck)

Scientia Horticulturae ◽

10.1016/j.scienta.2021.110057 ◽

2021 ◽

Vol 283 ◽

pp. 110057

Author(s):

Songwei Wu ◽

Changming Zhang ◽

Ming Li ◽

Qiling Tan ◽

Xuecheng Sun ◽

...

Keyword(s):

Citrus Sinensis ◽

Soluble Sugar ◽

Navel Orange

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Desenvolvimento vegetativo e custo de produção de porta-enxertos de citros em recipientes para fins de subenxertia

Pesquisa Agropecuária Brasileira ◽

10.1590/s0100-204x2007000500010 ◽

2007 ◽

Vol 42 (5) ◽

pp. 679-687 ◽

Cited By ~ 7

Author(s):

Eduardo Augusto Girardi ◽

Francisco de Assis Alves Mourão Filho ◽

Sônia Maria de Stefano Piedade

Keyword(s):

Citrus Sinensis ◽

Poncirus Trifoliata ◽

Citrus Paradisi ◽

Citrus Jambhiri ◽

Citrus Volkameriana

O objetivo deste trabalho foi avaliar o desenvolvimento vegetativo e estimar o custo de produção de 11 porta-enxertos de citros para fins de subenxertia, em diferentes recipientes. Avaliaram-se limão 'Cravo' clone Limeira (Citrus limonia Osbeck); citrumelo 'Swingle' (Poncirus trifoliata (L.) Raf. x Citrus paradisi Macf.); tangerina 'Cleópatra' (Citrus reshni Hort. ex Tanaka); tangerina 'Sunki' (Citrus sunki Hort. ex Tanaka); limão 'Volkameriano' clone Catânia 2 (Citrus volkameriana Pasquale); laranja 'Caipira' clone DAC (Citrus sinensis L. Osbeck); limão 'Rugoso da África' clone Mazoe (Citrus jambhiri Lush.); Poncirus trifoliata 'Davis A'; tangerina 'Sun Shu Sha Kat' (Citrus sunki Hort. ex Tanaka); tangerina 'Sunki' clone 2506 ou Fruto Grande (Citrus sunki Hort. ex Tanaka) e Poncirus trifoliata 'Barnes'. Foram utilizados tubetes de 290 mL, sacolas de 1,7 L, e porta-enxertos transplantados de tubetes de 75 mL para sacolas de polietileno de 1,7 e 4,5 L. Porta-enxertos produzidos diretamente em sacolas de 1,7 L atingem ponto ideal de subenxertia em menor tempo, de 100 a 150 dias após a semeadura, e permitem a obtenção de plantas maiores e com sistema radicular adequado, porém com custo de produção superior ao sistema de produção em tubetes de 290 mL.

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Mudas de laranjeira 'valência' sobre dois porta-enxertos e sob diferentes manejos de adubação

Revista Brasileira de Fruticultura ◽

10.1590/s0100-29452010005000082 ◽

2010 ◽

Vol 32 (3) ◽

pp. 855-864 ◽

Cited By ~ 7

Author(s):

Eduardo Augusto Girardi ◽

Francisco de Assis Alves Mourão Filho ◽

André Siqueira Rodrigues Alves

Keyword(s):

Citrus Sinensis ◽

Poncirus Trifoliata ◽

Citrus Paradisi

O manejo da adubação é uma das principais práticas culturais para a produção de mudas cítricas em cultivo protegido. Avaliou-se o efeito de seis tipos de manejo das adubações comercialmente recomendadas na produção de mudas de laranjeira 'Valência' [Citrus sinensis (L.) Osbeck] enxertada sobre os porta-enxertos limoeiro 'Cravo' (Citrus limonia Osbeck) e citrumeleiro 'Swingle' [Citrus paradisi Macf. x Poncirus trifoliata (L.) Raf.]. As avaliações foram conduzidas a partir da transplantação dos porta-enxertos até 180 dias após a enxertia, em viveiro empresarial, em Conchal-SP. Os manejos corresponderam a duas soluções de fertilizantes solúveis aplicadas isoladamente, soluções de fertilizante solúveis associadas a fertilizante de liberação controlada e aplicação exclusiva de fertilizante de liberação controlada. O delineamento experimental adotado foi o fatorial 2 x 6 (porta-enxerto x manejo da adubação), em blocos casualizados, com três repetições e 12 mudas na parcela. O limoeiro 'Cravo' induziu maior crescimento ao enxerto. O crescimento vegetativo das mudas foi similar após o uso de fertilizantes solúveis ou de liberação controlada, apesar da grande variação de quantidades totais de nutrientes fornecidas às plantas. Desta forma, o viveirista poderá optar pelo manejo mais econômico ou prático, conforme as condições locais.

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