Summary
Incidence in the field of crop disorders known to be due to localised calcium deficiency bears little relation to soil calcium status, and is more often associated with particular types of weather. We are suggesting that brief periods of soil partial anaerobiosis following wet weather, and other unfavourable soil physical conditions such as compaction, lead to a temporary reduction in the distal, undifferentiated region of roots from which the majority of the calcium taken up is transported to the shoot. This might lead to a transient calcium deficiency in rapidly growing shoot tissues, and thence to necrosis.
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Scaife, M.A., Clarkson, D.T. Calcium-related disorders in plants — a possible explanation for the effect of weather. Plant Soil 50, 723–725 (1978). https://doi.org/10.1007/BF02107226
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DOI: https://doi.org/10.1007/BF02107226