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Relationship between oxalate concentration and leaf position in various spinach cultivars

, : Relationship between oxalate concentration and leaf position in various spinach cultivars. Hortscience 29(9): 1019-1021

A negative relationship has been reported between the oxalate concentration in leaves and leaf position numbered from the base for 'Okame' spinach (Spinacia oleracea L.). We compared changes in leaf and stem oxalate concentrations among three cultivars. 'Viroflay' differentiated and developed leaves at a lower rate than did 'Okame' and 'Kyoho'. Oxalate concentrations in plant tops decreased with time in 'Okame' and 'Kyoho', but 'Viroflay' changed little. The relationship between leaf oxalate concentration (Y; millimoles per gram of fresh weight) and its position on the stem (X) was the same for all cultivars and can be given as Y = -0.0089X + 0.158.

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