نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار گروه زراعت، دانشگاه پیام نور، ایران
2 دانش آموخته دکتری شیمی و حاصلخیزی خاک، دانشگاه ارومیه
3 استادیار گروه زیست شناسی، دانشگاه پیام نور، ایران
4 دانش آموخته دکتری فیزیولوژی گیاهی، دانشگاه شیراز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The aim of this study was to investigate the effect of chromium heavy metal on soil enzymatic activities and some physiological and morphological indices of portulaca oleracea L., with the local name of Khorfeh. The study was carried out based on a completely randomized design with three replications. Soil samples were infected with different concentrations of chromium (0, 25, 50, 75, and 100 mg kg-1 soil). After reaching equilibrium in the soil, Khorfeh plants were grown. The activity of dehydrogenase, phosphatase, and urease, and some physiological and morphological characteristics of plants was determined under chromium stress, then, the correlation between them was determined. The results showed that soil enzyme activities decreased with increasing chromium concentration in the soil. Root and shoot dry weights had the most negative correlation with chromium concentration. The role of soil enzyme activity in the evaluation of chromium contamination status was determined by the biochemical index of soil fertility, which showed the most negative correlation with shoot dry weight. The correlations between Cr concentration in soil and all the physiological indices of plants were above 0.9%. The dehydrogenase activity in relation to plant physiological indices showed similar behavior to the biochemical index of soil fertility. In general, according to the results of this study, the physiological indices of the plant with higher sensitivity than its morphological indices could indicate Cr contamination in the plant.
کلیدواژهها [English]
Zarafshar, M.,Akbarnia. M.,Asgari. H., Hosseini. M., and M. Rahaie. 2015. Physiological and biochemical changes in wild pear (Pyrus boisseriana) seedlings in response to irrigation changes. Applied Biology. 28 (1): 59-78.