Differences in potassium uptake in grapevine varieties: <p>Reasons and perspectives</p>
DOI:
https://doi.org/10.5073/vitis.1985.24.174-182Keywords:
potassium, sodium, magnesium, calcium, absorption, translocation, root, leaf, variety of vine, selectionAbstract
The varietal differences in potassium uptake in two grapevine cultivars (Vitis vinifera L. cvs Leányka and Ezerjó) were studied by measuring K (86Rb) influx rates under near-equilibrium conditions. For this purpose, one-node cuttings were rooted and grown in nutrient solutions with different K supplies. The transport data are discussed along with K, Na, Mg and Ca contents of roots, petioles and leaf blades. It was found that the effective K-utilizer variety, Leányka, possesses efficient uptake and translocation mechanisms while these transport systems were lacking in the inefficient K-utilizer Ezerjó. Since the data presented are in good agreement with practical experiences for the utilization of K by the two cultivars, the method seems to be suitable for the selection of the most effective K-utilizer varieties.Downloads
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