Nasrin Teimoori; Mokhtar Ghobadi; Danial Kahrizi
Abstract
Objective: The research aimed to investigate the effect of silicon foliar spraying in increasing drought tolerance in Camelina.Methods: The experiment was conducted as a factorial based on a randomized complete blocks design with three replications in a pot experiment. The treatments included two Camelina ...
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Objective: The research aimed to investigate the effect of silicon foliar spraying in increasing drought tolerance in Camelina.Methods: The experiment was conducted as a factorial based on a randomized complete blocks design with three replications in a pot experiment. The treatments included two Camelina genotypes (Sohail cultivar and line-84), drought treatments (at two levels: without and with drought stress) and foliar spraying of sodium silicate (at five levels: 0, 2, 4, 6 and 8 mM).Results: The results showed that drought stress decreased grain yield, yield components, and morphological traits of both Camelina genotypes. Drought stress reduced the grain weight per plant of the Sohail cultivar and Line-84 by about 27 and 39%, respectively. Foliar application of silicon effectively increased yield and yield components. On average, foliar spraying of 6 mM silicon compared to the control treatment caused an increase in the traits of grain weight per plant (13.04%), harvest index (12.1%), and the number of siliques per plant (7%). In the correlation analysis, it was found that among the grain yield components, the highest positive correlation coefficient with the grain weight per plant belonged to the number of siliques per plant (0.941).Conclusion: Overall, it seems that foliar application of 6 mM silicon can be effective in increasing drought tolerance in Camelina.
masoud arghavani; Saeedeh Savadkoohi; Seyed Najmadin Mortazavi
Abstract
This experiment was conducted in order to investigate morphological and physiological responses of Kentucky bluegrass (Poa pratensis L.) to salinity and silicon application in horticultural science department at the University of Zanjan in 2015. The salinity levels (0, 40 and 80 mM NaCl) and sodium silicate ...
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This experiment was conducted in order to investigate morphological and physiological responses of Kentucky bluegrass (Poa pratensis L.) to salinity and silicon application in horticultural science department at the University of Zanjan in 2015. The salinity levels (0, 40 and 80 mM NaCl) and sodium silicate (0, 0.75 and 1.5 mM) were applied in complete nutrient solutions. Salinity reduced root and shoot growth, visual turf quality, leaves chlorophyll and potassium content, whereas electrolyte leakage, proline and sodium content increased with increasing salt concentration in nutrient solution. Silicon application ameliorate adverse effects of salinity in all factors except in potassium content and this effect was more pronounced in 80 mM NaCl. Although there was no significant difference between 0.75 and 1.5 mM sodium silicate in visual turf quality, root growth and chlorophyll content, altogether, application of 1.5 mM silicon had better results to increase salinity tolerance in Kentucky bluegrass, suggesting that higher concentrations of silicon must be evaluated.