CATIONIC NATURE OF WATER AND HYDROGEN PEROXIDE ON THE FORMATION OF PASSION FRUIT SEEDLINGS1

ABSTRACT This study was carried out with the objective of evaluating water relations, photosynthetic pigments and growth passion fruit cv. BRS Rubi do Cerrado, as a function cationic nature irrigation exogenous application hydrogen peroxide. The experiment under greenhouse conditions in Pombal – PB, Brazil. experimental design randomized blocks, 6 × 4 factorial scheme, corresponding to six - CNW (S1 Control; S2 Na+; S3 Ca2+; S4 Na++Ca2+; S5 Mg2+ S6 Na++Ca2++Mg2+) four concentrations peroxide H2O2 (0, 20, 40 60 μM), distributed block replicates. Plants control treatment (S1) were irrigated using electrical conductivity (ECw) 0.3 dS m-1, while those other treatments (S2; S3; S4; S6) subjected ECw 3.0 prepared different cation(s). Application μM reduced percentage intercellular electrolyte leakage plants calcic composition. Salinity composed sodium, sodium+calcium sodium+calcium+magnesium, resulted lower leaf potential. biomass accumulation more sensitive variation water. Regardless nature, use m-1 produced seedlings Dickson quality index higher than 0.2, considered acceptable.