Leaf gas exchange,water relations,nutrient content and growth in citrus and olive seedlings under salinity |
| |
Authors: | J C Melgar J P Syvertsen V Martínez F García-Sánchez |
| |
Institution: | (1) Departmento de Agronomía, Universidad de Córdoba, Edificio Celestino Mutis, Ctra. Madrid-Cádiz km. 396, E-14071 Córdoba, Spain;(2) UF/IFAS, Citrus Research and Education Center, 700 Experiment Station Road, Lake Alfred, FL 33850, USA;(3) Centro de Edafología y Biología Aplicada del Segura, CSIC, Campus Universitario de Espinardo, Espinardo, E-30100 Murcia, Spain |
| |
Abstract: | The effects of salinity on growth, leaf nutrient content, water relations, gas exchange parameters and chlorophyll fluorescence
were studied in six-month-old seedlings of citrus (Citrus limonia Osbeck) and rooted cuttings of olive (Olea europaea L. cv. Arbequina). Citrus and olive were grown in a greenhouse and watered with half strength Hoagland’s solution plus 0
or 50 mM NaCl for citrus, or plus 0 or 100 mM NaCl for olive. Salinity increased Cl− and Na+ content in leaves and roots in both species and reduced total plant dry mass, net photosynthetic rate and stomatal conductance.
Decreased growth and gas exchange was apparently due to a toxic effect of Cl− and/or Na+ and not due to osmotic stress since both species were able to osmotically adjust to maintain pressure potential higher than
in non-salinized leaves. Internal CO2 concentration in the mesophyll was not reduced in either species. Salinity decreased leaf chlorophyll a content only in citrus. |
| |
Keywords: | Additional" target="_blank">Additional chlorophyll fluorescence leaf chlorophyll content NaCl photosynthesis rootstock |
本文献已被 SpringerLink 等数据库收录! |
|