Author/Authors :
Gonthier، P نويسنده Plant Pathology, University of Torino, Via Leonardo da Vinci 44, I-10095 Grugliasco (Torino), Italy , , Nicolotti، G نويسنده Plant Pathology, University of Torino, Via Leonardo da Vinci 44, I-10095 Grugliasco (Torino), Italy , , Rettori، A نويسنده Plant Pathology, University of Torino, Via Leonardo da Vinci 44, I-10095 Grugliasco (Torino), Italy , , Paoletti، E نويسنده Plant Protection Institute – CNR, Via Madonna del Piano 10, I-50019 Sesto Fiorentino (Firenze), Italy , , Gullino، M L نويسنده Center of Competence for the Innovation in the Agro-environmental field, University of Torino, Via Leonardo da Vinci 44, I-10095 Grugliasco (Torino), Italy ,
Abstract :
Oleander was tested as biomonitoring plant for surfactant polluted marine aerosol.
Potted plants in the greenhouse were sprayed once a week for 5 weeks with seawater containing
sodium dioctyl sulfosuccinate (SDS) at the following concentrations: 5, 10, 15, 30, 60, 120, 250, 500
mg/L. A significant correlation was found between SDS concentration in the spray and surfactant
deposit on the leaves at the end of the 5 weeks. At that time and two months later, we assessed: leaf
visible injury, foliar chloride content, damage to stomatal crypts, water potential, net photosynthesis
and stomatal conductance. Relative to controls (not sprayed and sprayed either with deionized
water or with seawater without surfactants), all the parameters were affected (P < 0.05) by the presence
of surfactant. Furthermore they were correlated (P < 0.05) with the concentration of surfactant. Visible
injury occurred after treatments containing concentrations of surfactant exceeding 30 mg/L.
