PHYSIOLOGICAL-ASPECTS OF LIME-INDUCED CHLOROSIS IN SOME VITIS SPECIES.2. GENOTYPE RESPONSE TO STRESS CONDITIONS

One-year-old cuttings from 7 Vitis species (V. amurensis Rupr., V. ber landieri Planch., V. californica Bentham, V. cinerea Engelm., V. longi i Prince, V. monticola Buckl., V. riparia Michx.) were grown in pots c ontaining non-calcareous and calcareous soil. Leaves selected in the m iddle of the second year's growing season were assayed to test the iro n concentration of the dry matter and the total iron uptake. The most significant findings of the trial were: a) shoot growth of V. amurensi s, V. longii, V. monticola and V. riparia was strongly depressed by th e calcareous soil; b) V. berlandieri and V. californica took up higher amounts of iron when growing in the calcareous soil; c) a high ash al kalinity occurred in chlorotic leaves of V. riparia compared to non-ch lorotic leaves at the same iron concentration.