فهرست مطالب forogh mortazaeinezhad

In recent years, in the world and in Iran as well, attention to Lisianthus flowers has been such that its production has increased significantly. With the increase in the production of Lisianthus cut flowers, attention to nutrition and application of treatments to improve the growth and storability of this flower is felt more than ever. For this purpose, the effect of karrikin, salicylic acid and humic acid on the morphological and biochemical characteristics of Lisianthus was investigated in a factorial experiment in a completely randomized design with three replications. The studied treatments included application of karrikin (0, 1 and 2 mg.l-1) as irrigation, salicylic acid (0, 100 and 200 mg.l-1) and humic acid (0, 50 and 100 mg.l-1) as foliar application. The results showed that the application of salicylic acid 100 mg.l-1 had the greatest effect on morphological and biochemical parameters, meanwhile, in some traits such as shoot dry weight and leaf area, a concentration of 200 mg.l-1 was more effective. Also, the use of humic acid increased the leaves and roots fresh and dry weight by increasing root expansion. karrikin treatment 1 mg.l-1 increased the number of leaves, stem length and diameter and number of flowering stems, fresh and dry weight of roots, number of seed capsules and number of buds per branch. karrikin in combination with humic acid and especially salicylic acid with synergistic effect improved some parameters such as number of roots and leaves and flowering stems and the activity of phenylalanine ammonialyase (PAL). Concomitant use of salicylic acid 100 mg.l-1 with humic acid 50 mg.l-1 as foliar application and application of Karrikin 1 mg.l-1 as a plant solution is recommended to improve growth parameters and the quality of lisianthus flowers.

Study of growth condition of medicinal plants under different water stress levels could be as an indicator for cultivation of drought resistance species in water scarce regions. Abiotic stresses such as drought stress are the main limitation factors in crop production and landscape development in arid or semi-arid regions such as Iran. Using drought resistant medicinal plants for developing landscape is the best solution. This study was conducted to evaluate the Cichorium intybus under four water stress levels including 45, 60, 75 and 90% field capacity in three replications over 2014-2015 in Isfahan University nursery. Results showed significant effects (P

This study was conducted to investigate the effects vermicompost, drought stress, and salicylic acid on chlorophyll and carotenoid contents of petunia plants. Experimental treatments were drought stress including two levels with and without stress, four salicylic acid concentrations including 0, 50, 100, and 200 ppm and three levels of vermicompost (0, 10, and 20% w/w). The experiment was carried out as a completely randomized design with 3 replications. The application of vermicompost resulted in significant increases in contents of chlorophyll a, total chlorophyll and carotenoid compared to control. The content of chlorophyll a and total chlorophyll in 50 ppm salicylic acid was significantly greater than that in other treatments. However, the chlorophyll b and carotenoid content was lower in the in 100 ppm salicylic acid than in other treatments. The results indicated that drought stress significantly reduced these pigments. The highest the content of chlorophyll a was observed at the rate of 10% vermicompost, 50 ppm salicylic acid, and no-stress condition. The treatment of 200 ppm salicylic acid at no-stress condition and rate of 20% vermicompost had the highest of chlorophyll b content. The highest the content of total chlorophyll was observed at the rate of 10% vermicompost, 50 ppm salicylic acid, and no-stress condition. The treatment of without salicylic acid and vermicompost at stress condition had the highest of carotenoid content. Based on the results of this experiment, application of salicylic acid and vermicompost improved the contents of chlorophyll a, total chlorophyll, and carotenoid of Persian petunia under drought conditions.