Seasonal Periodicity of Black Currant Root Growth and the Influence of Simulated Mechanical Harvesting

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Abstract
Summary The pattern of black currant root growth and the effects on it of simulated mechanical harvesting were studied using four bushes of cv. Baldwin growing adjacent to the windows of an underground root laboratory. The length of visible white root was recorded at weekly intervals over a period of four years. During the early years there was no obvious seasonal pattern of growth, but in the later years there was a large summer peak in the length of root present, which corresponded with a peak of shoot growth, followed by a small autumn peak. Shoot removal to simulate mechanical harvesting markedly reduced the length of root present.

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