GABA shunt pathway is stimulated in response to early defoliation-induced carbohydrate limitation in Mandarin fruits

Lourkisti, Radia; Antoine, Sandrine; Pailly, Olivier; Luro, François; Gibon, Yves; Oustric, Julie; Santini, Jérémie; Berti, Liliane

doi:10.1016/j.heliyon.2023.e15573

Cited by 2 publications

(3 citation statements)

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“…The tastier and sweeter varieties will be more appreciated in the market, which will allow the growers to obtain greater economic profitability. According to the results obtained, the 'Orri' variety will stand out for its greater sweetness, since a much higher amount of sucrose and glucose was detected in the leaves than in the other two varieties, which correlates with the sugar that will be present in the fruit [33,34].…”

Section: Resultsmentioning

confidence: 89%

“…This is of great interest due to the fact that plantations of this citrus are usually carried out in areas commonly affected by drought, such as southeastern Spain. In the same way, this amino acid provides us with information on the final quality of mandarins, since GABA concentrations in leaves are closely related to the conversion of citric acid Into sugars during the fruit ripening process [33].…”

Section: Amino Acidsmentioning

confidence: 99%

“…The presence of this sugar is of great importance for the final quality of the fruit, since during the ripening process sucrose is mobilized from the leaves to the fruit, providing a large part of the characteristic sweet taste. [33,34,47,50].…”

Section: Sugarsmentioning

confidence: 99%

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Mandarin Variety Significantly Affects the Metabolites Present in the Leaves

Maciá-Vázquez,

Núñez-Gómez,

Martínez-Nicolás

et al. 2024

Horticulturae

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Late-season varieties of mandarin (Citrus reticulata Blanco) have a high economic value, so their study, characterization, and comparison among different commercial varieties is of great interest for agriculture. Detailed metabolomic analysis of mandarin leaves can provide valuable information on agronomic characteristics, vegetative development, and tree response to abiotic and biotic stresses. In this study, an analysis of the main metabolites presents in the leaves of three late-season mandarin orange varieties (‘Afourer’, ‘Orri’ and ‘Tango’), cultivated under homogeneous conditions, was carried out using nuclear magnetic resonance (1H NMR) and multivariate statistical analysis techniques. The results show that organic acids and sugars are the metabolites with the highest presence in mandarin leaves, especially malate and sucrose. Ten amino acids and other metabolites such as choline and trigonelline were also detected. Metabolites such as asparagine and isoleucine were widely implicated in the metabolic pathways of the detected compounds. The ‘Orri’ variety showed significantly more differences in metabolite concentrations compared to the other two varieties studied. Malate and sucrose were shown to be the metabolites with the greatest significant differences between the varieties compared. From an agronomic point of view, the ‘Orri’ variety differs from the other two varieties because it has concentrations of metabolites that provide good resistance to abiotic and biotic stresses and fruits of higher quality and sweetness.

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Section: Resultsmentioning

confidence: 89%

Section: Amino Acidsmentioning

confidence: 99%