Iranian Biology Society Journal of Plant Research (Iranian Journal of Biology) 2383-2592 27 5 2015 02 20 The effects of silicon on phytochelatins, none structural carbohydrate and K in two cultivars of Iranian rice (Oriza sativa) The effects of silicon on phytochelatins, none structural carbohydrate and K in two cultivars of Iranian rice (Oriza sativa) 937 948 552 27517 FA Heidar Ali Malmir Dr. Heidar Ali Malmir Associate Professor Laboratory of Plant physiology Department of Biology BU-Ali Sina University Hamedan, Iran E-mail: malmir1@basu.ac.ir malmir4@yahoo.com Sakine Rudi student Journal Article 2013 04 21 Silicon was reported to have beneficial effects on the growth, protection against biotic and abiotic stresses of plants, but the effects of Si and the relation between accumulation of phytochelatins, none structural carbohydrate (NSC), K and Si are poorly studies. For this purpose, the effect of silicon (Si) on time-before flowering on the changes of NSC and phytochelatins, K and Si in two rice cultivars (Shiroudi and Ause) differing in salt stress was studied. The experiment design was a standard factorial plot with four replicates and the treatments were with four silicon levels 0, 0.25, 0.5 and 0.75 Si (g /kg soil), in sand culture. Significant decrease in NSC was observed in response to Si in the two cultivars roots, both the amount of phytochelatins from rice leaves and roots under Si increased with the Si level in the sand culture p≤0.05. the results indicated that at shiroudi and Aus cultivars, the Si variable were predicted 97% and 79% are related to leaf area and 82% and 95% to dry weight leaf, respectively. These results suggest that either the Si might also play an important role in consumption of NSC in leaves and roots or the transport of it was decreased in the roots. Among the parameter were examined in this experiment, phytochelatins were play an important role in changing concentration Si. The Si and K contents in roots and leaves were significantly increased with increased Si level in the sand culture p≤0.05. Silicon was reported to have beneficial effects on the growth, protection against biotic and abiotic stresses of plants, but the effects of Si and the relation between accumulation of phytochelatins, none structural carbohydrate (NSC), K and Si are poorly studies. For this purpose, the effect of silicon (Si) on time-before flowering on the changes of NSC and phytochelatins, K and Si in two rice cultivars (Shiroudi and Ause) differing in salt stress was studied. The experiment design was a standard factorial plot with four replicates and the treatments were with four silicon levels 0, 0.25, 0.5 and 0.75 Si (g /kg soil), in sand culture. Significant decrease in NSC was observed in response to Si in the two cultivars roots, both the amount of phytochelatins from rice leaves and roots under Si increased with the Si level in the sand culture p≤0.05. the results indicated that at shiroudi and Aus cultivars, the Si variable were predicted 97% and 79% are related to leaf area and 82% and 95% to dry weight leaf, respectively. These results suggest that either the Si might also play an important role in consumption of NSC in leaves and roots or the transport of it was decreased in the roots. Among the parameter were examined in this experiment, phytochelatins were play an important role in changing concentration Si. The Si and K contents in roots and leaves were significantly increased with increased Si level in the sand culture p≤0.05. https://plant.ijbio.ir/article_552_94c7bb58efc3b337800875b5d382a072.pdf