Zinnia (Zinnia elegans L.) and Periwinkle (Catharanthus roseus (L.) G. Don) Responses to Salinity Stress

The study of salinity stress in irrigated floriculture can make a significant contribution to the preservation freshwater sources. To analyze morphological and aesthetic responses zinnia (Zinnia elegans L.) periwinkle (Catharanthus roseus (L.) G. Don) different levels, following treatments were performed: s0 = municipal water (control), s1 3 dS m−1, s2 4.5 s3 6 m−1. growth (flower number, plant height, branch leaf total fresh dry biomass, root length) was linearly reduced by increasing while all observed traits for treatment either equal or greater than control (n.s.) further increase showed (p < 0.01) decrease. first flower buds on appeared with (s0), bud treatment. With regard both necrosis, drying firing occurred during third week treatments. Zinnia proved be sensitive salinity, mild tolerance stress, up