Print version ISSN 0102-0536
QUEIROGA, Roberto Cleiton F de et al. Germination and initial growth stage of melon plant hybrids due to salinity. Hortic. Bras. [online]. 2006, vol.24, n.3, pp. 315-319. ISSN 0102-0536. http://dx.doi.org/10.1590/S0102-05362006000300009.
Cultivation sites with intense evaporation rates, drainage deficit and inadequate use of fertilizers have increased the problems with salinity by impairing the good development of cultures. In melon plants, the high concentration of salts in both soil and water bring about morphological, structural and metabolic changes and inhibit their growth and development. Therefore, the aim of this work was to evaluate germination and initial growth stage of melon plants hybrids in different levels of salinity of irrigation water and submitted to a saline stress through imbibition. The treatments were organized in a completely randomized design in factorial scheme 2x3x5 (seeds treated with and without preimbibition in saline solution of NaCl (6 g/L), three hybrids of melon plant Hy Mark, Honey Dew Red Flesh and Daimiel, and five levels of electrical conductivity of irrigation water (0.45; 1.30; 2.15; 3.00 and 3.85 dS m-1), with three replicates. Evaluation of germination rate, emergency speed, foliar area, height and dry mass of the aerial part were made. The pre-germinant treatment of melon plant seeds with saline solution (6 g/L) provided larger dry mass of the aerial part of seedlings and a significant increase in the percentage of germination. On the other hand, the salinity of irrigation water reduced the foliar area, the dry mass of the aerial part and the height of the seedling. Compared to the other two cultivars, Daimiel proved to be the most tolerant to salinity due to higher estimates of the foliar area, dry mass of the aerial part and the height of the seedling.
Keywords : Cucumis melo L; seedlings; production; osmoconditioning.