Investigations in to Cation Equilibrium in Grape (Vitis Vinifera L.)
Journal Title: International Journal of Agriculture Innovations and Research - Year 2018, Vol 6, Issue 4
Abstract
Investigations were carried out in Thompson Seedless grape and its clones, grown on their own root and different rootstocks to study whether the cation equilibrium varies with rootstock, tissues and phonological stage. Cation equilibrium was constant among the clones of Thompson Seedless but not with rootstocks, phonological stages or tissues. Constancy in equilibrium was observed in Thompson seedless on Dog Ridge but not on Salt Creek and 110 R rootstocks. Though Dog Ridge did not alter the equilibrium, it resulted in the increased proportion of K+ and reduced Na+. Similarly, K+ increased but Ca++, Mg++ and Na+ decreased, though the total cations did not vary in 2A on 1103 P. Increase in total cations in Thompson Seedless on Salt Creek was due to increase in the proportion of Na+, while on 110R due to increase in K+ and Na+ and reduction in Ca++. Equilibrium also existed between petioles and laminas at fruit bud differentiation stage but not at full bloom. Stages differed in cation equilibrium in petioles. Variation in the proportion of individual cations in different plant tissues at a given phenological stage was attributed to the readjustment of ions between the tissues and that in the same tissue at different phenological stages can be attributed to the differential metabolic needs of cations. Cation equilibrium constancy between vines on their own root and on Dog Ridge indicated the scion directed absorption of cations, whereas the differences in the equilibrium on Salt Creek and 110 R indicated differential absorption by roots. This necessitates investigations in to the rootstock effect on organic acids metabolism in grapevines and to establish whether the increased cations in the foliar tissues is due to the absorption of cations by roots or the increased synthesis of organic anions in vines on these rootstocks.
Authors and Affiliations
J. N. Kalbhor, et al.
Keywords
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