ابراهیم رضازاده کته سری

In order to evaluate the effect of priming by salicylic acid on seed germination and vegetative and physiological characteristics of zinnia (Zinnia elegans) under drought stress condition, two laboratory and pot factorial experiments were conducted based on completely randomized design with four replications in the laboratory and greenhouse of the Department of Horticulture, Faculty of Agriculture and Natural Resources, Hormozgan University at 2014. Experimental factors included priming with salicylic acid in concentrations of 0, 0.5, 1 and 1.5 mM and four drought levels (simulated by PEG 6000) ; 0, -0.5, -1 and -1.5 MPa. The results showed that in both laboratory and pot experiments drought stress reduced seed germination and early seedling growth of zinnia, significantly. While, seed priming with salicylic acid increased these traits when compared to control. In the pot experiment and -1 and -1.5 MPa drought conditions, the seed treatment with 1 mM concentration of salicylic acid improved zinnia vegetative characteristics. At the highest level of drought (-1.5 MPa) level application of 1.5 mM salicylic acid led to dampen the negative effects of the drought. Seed priming with salicylic acid increases the relative water content of the leaves under drought stress conditions. Generally seed priming with salicylic acid can be used for improving zinnia seed germination under drought conditions.

The identification of plants that are able to grow in the presence of oil pollutants or be effective in reducing pollution is very important. The experiment was acnducted in order to evaluate the phytoremediation rate and resistance of Conocarpus erectus L. under different oil sewage concentrations and calcium oxide levels in the Research Department of Horticulture, University of Hormozgan in 2009. Accordingly, four eaves seedlings were treated by oil sewage under five levels (0, 5, 10, 15 and 20 ml/kg soil), and calcium oxide under five concentrations (0, 2.5, 5, 7.5 and 10 percent). Despite the relative tolerance of seedlings to the oil sewage besed on the plant appearance, the results showed that the increasing of oil effluent concentration to 20 ml significantly decreased the vegetative traits such as shoot dry weight and root dry weight to 67% and 66%, respectively. In addition, 20 ml of waste oil reduced 50.6% peroxidase ascorbate enzyme activity and 62.1%of total solution protein. In comparison to control, waste oil at 20 ml level increased the ion leakage and lipids peroxidation to 51.8% and 42.8%, respectively. On the other hand, calcium oxide reduced damages of waste oil and improved vegetative traits such as shoot dry weight and root dry weight. Calcium oxide treatments also improved ion leakage, lipid peroxidation, and ascorbate peroxidase enzyme, and total solution protein. The use of Conocarpus erectus L for further phytoremediation studies can be useful. According to its relative resistance against oil sewage as well as the desired effects of calcium oxide on the plant, Conocarpus erectus L. could be introduced for phytoremediation in the oil -polluted soils.

A study was conducted to determine some biological characteristics of a mudskipper (Boleophthalmus dussumieri) such as length, weight frequencies, condition factor and growth parameters of von Bertallanfy in the provinces neighboring to the Persian Gulf, i.e. Bushehr and Hormozgan, from January 2007 to April 2008.The sampling were carried out using a hand net as well as bare hands. 333 specimens were collected in the provinces (164 from Hormozgan, 169 from Bushehr). The largest male and female samples were caught with the 280 and 283.4 mm from Bushehr province, respectively. There was no significant differences in sex ratios of the two populations (P>0.05). In both sexes, length frequencies of specimens from Bushehr had higher average values than those from Hormozgan. In both fish populations, the female’s condition factor was higher than the male’s condition factor, although the difference was not statistically significant (P>0.05). The age data, derived from radial pectoral fin. Five age groups were recognized for the Bushehr mudskippers. The most abundant ages were 1+ years. The age data were used to estimate the growth parameters of the Von Bertalanffy equation: Lt=301.9}1- exp [-0.41(t-2.02)]} for both sexes in Bushehr Province. Length and weight relationships between the two populations and the regression slope (b), which was very close to 3.00, indicated that in both provinces, the mudskippers have isometric growth. The relative gut length of 1.699 indicates that both populations are herbivore in their feeding habits.

The main problem of area near the oil regions is pollution of waste oil. Due to this event, cultivation will be difficult and then agricultural areas gradually will change to unusable lands. In order to evaluate phytoremediation rate, increasing resistance, waste oil concentrations and calcium oxide levels of Conocarpus erectus L. were studied. In this research, effects of waste oil 0, 5, 10, 15 and 20 ml kg-1 soil), calcium oxide (0, 2.5, 5, 7.5 and 10%) were evaluated on four leaves seedlings. The results showed that despite of the relative tolerance of seedlings to the waste oil, increasing effluent oil concentration to 20 ml, significantly decreased vegetative traits such as stem length, root length, shoot dry weight and root dry weight. In addition, 20 ml kg-1 waste oil reduced 3.3% leaf relative water content. In comparison of control, chlorophylla reduced 19% at 5 ml kg-1. Whereas, increasing waste oil to 20 ml kg-1 enhanced chlorophylla to 13.6% compared with the control. According to the results, chlorophyllb increased in all levels of waste oils. The highest concentration of waste oil elevated chlorophyllb to 47.9% more than that of control and the total chlorophyll only significantly reduced in waste oil level of 5 ml kg-1 compared with the control. On the other hand, calcium oxide enhanced stem length, root length, root to shoot length ratio, shoot dry weight, root dry weight and shoot dry weight to root dry weight ratio. Calcium oxide treatments also improved leaf relative water content and chlorophylla&b and total chlorophyll.