PHYSIOLOGICAL-ASPECTS OF LIME-INDUCED CHLOROSIS IN SOME VITIS SPECIES.1. POT TRIAL ON CALCAREOUS SOIL

One-year-old cutting from eleven Vitis spp. (V. aestivalis Michx., V. amurensis Rupr., V. andersonii Rehder, V. arizonica Engelm., V. berlan dieri Planch., V. californica Bentham, V. champini Plancch., V. cinere a Engelm., V. longii Prince, V. monticola Buckl., V. riparia Michx.) w ere grown in pot of a calcareous soil. Leaves selected in the middle o f the annual growing season were assayed for total chlorophyll, macron utrients, oligo-element and ash alkalinity. At the end of the annual g rowing cycle the whole plants were analyzed for the iron concentration of the dry matter. The most significant findings were: a) V. berlandi eri, V champini and V. cinerea ranked in the high tolerant group; V. a rizonica, V. californica, V. longii and V. monticola in the tolerant g roup; V. aestivalis, V. amurensis, V. andersonii and V. riparia in the susceptible group; b) it is likely to exist two different mechanisms of tolerance to lime-induced chlorosis: an adaptive one for V. berland ieri and V. cinerea and a protective one for V. champini