The aim was to study structure of the biochemical constituents of olive fruit show considerable changes during growth and ripening. In this investigation was studied some biochemical characterization (total sugar, photosynthetic pigments and total anthocyanin) on Koroneiki, T₂ and T₇ cultivars of olives in during fruit ripening in Ahvaz zone. So that, information on these parameters is important factor in quality assessment of olive products. Samples were harvested on 1th of July and on every 15th of each month till October. Photosynthetic pigments content was measured according to Lichtenthaler. Total anthocyanin was determined by the PH differential method. The soluble carbohydrates were determined using the phenol-sulphuric acid method. The highest and lowest content of total carotenoid belonged to Koroneiki cultivar (16.14 mg/g FW) at harvest 1 and to T₂ cultivar (2.64 mg/g FW) at harvest 6, respectively. The anthocyanin content of different olive cultivars increased in during fruit ripening. Highest of total anthocyanin content belonged to T₇ cultivar (0.033 mg/g FW) at harvest 6. The total sugar content decreased during ripening. The highest total sugar content of fruit belonged to Koroneiki cultivar (86.3 mg/g FW) at harvesting time 1 and the lowest to T₇ cultivar (7.7 mg/g FW)  at harvesting time 6 as well. In general, T₇ cultivar by high content of anthocyanin and adaptation to warm climatic conditions of ahvaz, showed its advantage in comparison to the other studied cultivars.

The objective of the present investigation was to study the effect of drought stress, UV-B radiation and the combined effects of UV-B and drought stresses on two cultivars of gourd (mashhadi and hamadani) seedling. the gourd plants were grown with diurnal regime of 16h light and 8h dark and temperature of 22/260C (night/day). The relative humidity was 60% and average of photosynthetically active radiation was 150 µmol.m-2.S for 25 days. Then, 25-days-old seedlings were divided in to four groups: the control and three groups subjected to stress conditions: UV-B radiation and drought stress conditions, UV-B radiation and drought stresses combined. Results showed that shoot and root length, shoot and root dry and fresh weight, leaf total area, leaf RWC, chlorophyll a, b and carotenoid contents which were irradiated either with UV-B, drought stress or combined of two stresses have reduced significantly when compared with control. The physiological parameters indicate that with this experiment situation UV-B stress has stronger stress effectors than drought on the growth of seedling of both cultivars. The results suggested that co-stresses of supplementary UV-B radiation and drought synergistically functioned and one of them could alleviate the inhibitory effects of another under the condition of arid and semiarid loessial soils.