Gibberellic acid and norflurazon affecting the time-course of flavedo pigment and abscisic acid content in ‘Valencia’ sweet orange

Gambetta, Giuliana; Mesejo, Carlos; Martínez‐Fuentes, Amparo; Reig, Carmina; Gravina, A.; Agustí, Manuel

doi:10.1016/j.scienta.2014.10.021

Cited by 20 publications

(11 citation statements)

References 40 publications

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“…23 showed that pre-harvest ABA spray regulates fruit color development in Navel orange, whose pigmentation is due to carotenoids, suggesting the involvement of ABA in the regulation of ripening-related processes. However, in Valencia sweet oranges the ABA level in flavedo increases as color develops but ABA did not trigger color break 24 . On the other hand, it has been suggested that ABA would enhance tissue sensitivity to ethylene, whereas exogenous ethylene application stimulates ABA accumulation and expression of the corresponding biosynthesis genes 18,25,26 , indicating that ABA takes part of a complex hormonal interaction in the regulation of non-climacteric fruit maturation.…”

Section: Introductionmentioning

confidence: 81%

A sweet orange mutant impaired in carotenoid biosynthesis and reduced ABA levels results in altered molecular responses along peel ripening

Romero

Lafuente

Rodrigo

2019

Sci Rep

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Citrus fruit ripening is a complex process involving biochemical, physiological and molecular events that differ between the flesh and the peel of the fruit. We characterized sweet orange peel maturation by means of a comparative transcriptomic analysis between Navelate orange ( Citrus sinensis L. Osbeck) and its mutant fruit Pinalate, which presents a severe blockage at early steps of the carotenoid biosynthetic pathway and consequently reduced ABA levels. Peel ripening involved the decrease of the photosynthetic activity and the transmembrane transport processes, as well as the buildup of starch and cuticular waxes and the cell wall modification. In addition, a number of biotic and abiotic stress responses, including the defense response, and the response to blue light, water deprivation and abscisic acid stimulus were modulated in a ripening-stage specific manner. The regulation of energy-related processes and secondary metabolism pathways was attenuated in Pinalate, while the molecular mechanisms underlying stress responses displayed dependency on ABA levels. These results indicate that ABA is a key signal inducing stress responses along orange peel ripening, which might determine the fruit postharvest performance.

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Section: Introductionmentioning

confidence: 81%

A sweet orange mutant impaired in carotenoid biosynthesis and reduced ABA levels results in altered molecular responses along peel ripening

Romero

Lafuente

Rodrigo

2019

Sci Rep

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“…Peduncle-girdled oranges remained greener compared to control fruit, but GA and ABA remained at high concentrations (Gambetta et al, 2012). Additionally, exogenous ABA did not promote color development (Iglesias et al, 2007), and norflurazon application, an inhibitor of PDS activity, did not affect chlorophyll degradation, although it partially blocked carotenoid biosynthesis, and thus transiently reduced color intensity and ABA concentration in the flavedo (Gambetta et al, 2014).…”

Section: Abscisic Acidmentioning

confidence: 88%

“…Moreover, in peduncle-girdled fruits, which remained green, GA 1 and GA 4 levels remain high, suggesting that the presence of GA in the peel prevents the onset of fruit color change (Gambetta et al, 2012). In this sense, application of GAs is long recognized to delay chlorophyll degradation and carotenoid biosynthesis in citrus fruit (Lewis and Coggins, 1964;Agustí et al, 1981;García Luis et al, 1986;Alós et al, 2006;Gambetta et al, 2014). Moreover, foliar spray of prohexadione-Ca, a GA biosynthesis inhibitor, before color break, enhanced coloration in Navel orange and increased total carotenoid accumulation in the peel (Barry and van Wyk, 2004).…”

Section: Gibberellinsmentioning

confidence: 99%

Key determinants of citrus fruit quality: Metabolites and main changes during maturation

Lado

Gambetta

Zacarías

2018

Scientia Horticulturae

Self Cite

182

119

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Citrus is one of the main fruit crops in the world and widely recognized by their organoleptic, nutritional and health-related properties of both fresh fruit and juice. The genetic diversity among the genus and the autonomous and independent changes in peel and pulp, make the definition of standard maturity indexes of fruit quality difficult. Commercial maturity indexes in the citrus industry are usually based on peel coloration, percentage of juice, soluble solids/acidity ratio but their relevance may differ among varieties and the specific requirements of the markets. There is also a marked influence of environmental and agronomic conditions such as light and temperature, rootstock selection and plant nutrition, among others. Besides commercial requirements, a more comprehensive definition of fruit quality should also consider organoleptic and nutritional properties that are determined by a complex interaction among a number of bioactive components. Citrus fruit are an excellent source of many phytochemical, including ascorbic acid, carotenoids (antioxidant and pro-vitamin A), polyphenols, flavonoids, limonoids, terpenoids, etc., which greatly contribute to the health-related benefits of these fruits. Criteria and definition of the main maturity indexes for citrus fruit worldwide are described, as well as changes during fruit maturation in key components affecting organoleptic and nutritional properties. Moreover, the involvement of hormonal and nutritional signals and their interaction in the regulation of external and internal maturation of citrus fruit, as well as the influence of environmental and agronomic factors are also critically revised and discussed.

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“…The Promalin Ò and CO 2 treatments affected the chlorophyll content. Promalin Ò treatment decreased chl b while it increased chl a. GA has been previously presented as a delayer of chl degradation (Gambetta et al, 2014;Jordi et al, 1995;Wachowicz et al, 2006) what would be according with our results in chl a but contrary to our findings in chl b. Although cytokinins are able to promote chl biogenesis (Dobr anszki and Mendler-Drienyovszki, 2014) many studies have shown that GA and cytokinin exert antagonistic effects, where cytokinins inhibit the production of GA and promote its deactivation and GA inhibit cytokinin responses (Weiss and Ori, 2007).…”

Section: Discussionmentioning

confidence: 81%

Growth, Plant Quality, and Survival of Sweet Cherry (Prunus avium L.) Seedlings are Enhanced by CO2 Enrichment

Pérez‐Jiménez

Bayo-Canha

López‐Ortega

et al. 2017

horts

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Enrichment with CO2 and a commercial mix of plant growth regulators were tested to improve the plant quality and survival of pregerminated cherry tree seedlings. Pregerminated seeds were transferred from a cold chamber to a climatic chamber where the CO2 was set at 800 µmol·mol−1 CO2 or at the ambient CO2 concentration. Also, half of the plants were sprayed with the mix of plant growth regulators and disposed randomly. The experiment lasted 18 days and physiological measurements, such as plant physiological status and growth, number of leaves, net CO2 assimilation (ACO2), internal CO2, stomatal conductance, and transpiration, were taken every 4 days. Also, at the end of the experiment, other parameters—such as total leaf area, photosynthetic pigments, soluble sugars, and starch—were recorded or quantified. During the experiment, plants cultured under CO2 enrichment exhibited a rapid increase in their photosynthetic rates, height, and leaf number; the commercial mix also increased plant height but inhibited leaf expansion and growth. At the end of the experiment, the amounts of starch and soluble sugars had increased in the plants grown under elevated CO2, compared with those plants grown in control conditions or with the commercial mix. Thus, culture at elevated CO2 achieved higher percentages of plant survival and of plants in active growth. We suggest that CO2 plays an important role—by increasing ACO2, water use efficiency, soluble sugars, and starch—which results in plants that are physiologically more prepared for transfer to the field.

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Gibberellic acid and norflurazon affecting the time-course of flavedo pigment and abscisic acid content in ‘Valencia’ sweet orange

Cited by 20 publications

References 40 publications

A sweet orange mutant impaired in carotenoid biosynthesis and reduced ABA levels results in altered molecular responses along peel ripening

A sweet orange mutant impaired in carotenoid biosynthesis and reduced ABA levels results in altered molecular responses along peel ripening

Key determinants of citrus fruit quality: Metabolites and main changes during maturation

Growth, Plant Quality, and Survival of Sweet Cherry (Prunus avium L.) Seedlings are Enhanced by CO2 Enrichment

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