Distribution of Potassium between Vacuole and Cytoplasm in Response to Potassium Deficiency
Differential changes in the distribution of potassium between cytoplasm and vacuole may be an important response of plants to K+ deficiency. Leigh and Wyn-Jones (1984) suggested that as tissue K+ concentration declines, the K+ concentration in the cytoplasm will remain constant while that in the vacuole will decrease. They proposed that decreases in cytoplasmic K+ concentration would only be observed at low tissue K+ concentrations and that growth would decline in response to these decreases. Evidence for such differential behaviour of the cytoplasmic and vacuolar K+ pools in barley leaf cells has now been obtained using X-ray microanalysis.
KeywordsEpidermal Cell Mesophyll Cell Barley Plant Differential Behaviour Potassium Deficiency
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