标题：THE INFLUENCE OF NaCI STRESS ON PLANT TISSUE NUTRIENT CONCENTRATIONS AND
COMPARTMENTALIZATION OF Na AND CI WITHIN LEAF SURFACE AREA OF PERSEAAMERICANA MILL (CV.'FUERTE?)
摘要：Avocado is a salt sensitive fruit tree species that often faces serious problem of saline toxicity in many coastal areas,including those of Greece.Salin-ity cause negative effects on avocado yields and fruit quality,as well as on the survival of young plantlets. In order to investigate this problem, a 75-day pot ex-periment, inside an experimental greenhouse, with 6 NaCl treatments(0,5, 10,15,20 and 30 meq NaCl /L)was conducted. The objectives of this study were to investigate the effects of NaCl stress on: i)the nu-trition of 'Fuerte'avocado plants and Na and Cl dis-tribution in different vegetative tissues(Top leaves, Basal leaves, Graft stem, Rootstock stem and Root), ii) the compartmentalization of Na and Cl within the following leaf surface area zones:Apex(1), Margin (2),Centre (3)and Base(4), in mature,as well as in young leaves.It was found that the highest Cl and K concentrations in the top and basal leaves were found in 30 meq NaCl/L. Na concentration was signifi-cantly higher in graft stem, rootstock stem and root, in the treatments 15-30 meq NaCl/L.Compartmen-talization in mature leaves indicated that Cl concen-tration was significantly higher in the Apex leaf zone, in the treatments 15,20 and 30 meq NaCI/L. With regard to Na compartmentalization, neither in the young leaves, nor in the mature ones were found sig-nificant differences in Na concentration among the leaf zones 1-4.
