It is known that there is a competition for nutrients, water and carbohydrates between roots and fruit-shoot systems. But while root restriction has been reported to reduce top growth of deciduous tree crops (Myers, 1992), the influence of root restriction on fruit quality has received little attention. For example, a relationship between root growth and fruit ripening has been found for ‘Delicious’ apple trees, given that the lower rooting by a deficit irrigation advanced fruit ripening and resulted in fruits with higher soluble solid contents and lower titratable acidity, than those from irrigated trees (Ebel et al., 1993). In Citrus, lowering soil temperature reduces root growth, which, in turn, advances rind colour-break ( Mesejo et al., 2012).
It is known that there is a competition for nutrients, water and carbohydrates between roots and fruit-shoot systems. But while root restriction has been reported to reduce top growth of deciduous tree crops (Myers, 1992), the influence of root restriction on fruit quality has received little attention. For example, a relationship between root growth and fruit ripening has been found for ‘Delicious’ apple trees, given that the lower rooting by a deficit irrigation advanced fruit ripening and resulted in fruits with higher soluble solid contents and lower titratable acidity, than those from irrigated trees (Ebel et al., 1993). In Citrus, lowering soil temperature reduces root growth, which, in turn, advances rind colour-break ( Mesejo et al., 2012).
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