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A, Growth rate on an organ basis during early cucumber development. Growth was estimated based on dry weight and tissue carbon content. The dashed line is an estimate of total carbon fixation based on gas exchange for 1 week. Respiration accounts for the difference between the bars and the dashed line. Shoot apex biomass includes the apical bud and the first true leaves. B, Change in seedling source (cotyledons and true leaves) area over time.
