جستجوی مقالات مرتبط با کلیدواژه « Pharagmites australis » در نشریات گروه « محیط زیست »

Heavy metals cases are threatening the health of ecosystems. Accumulation of metals in the soil allows them to plant crops and thus increases the risk of agriculture crops health. The goal of this research was conducted to evaluate zinc stress resistance for Pharagmites australis in greenhouse conditions.

Experimental design was performed in an entirely randomized plan having two factors and three replications, 2016 at University of Jiroft. Digestion and preparation of samples were done by dry burning method and then Zinc concentration was measured by atomic absorption.

Greenhouse experiments results showed that with increasing in metal concentration treatments, its absorbing with shoot and root were increased. However, impressive accumulation of zinc was in root and its translocation and accumulation in shoot has been reported much less.

With absorb and accumulate of metals in root, ability of plant growth was decreased with changes in physiological characteristics. Results of regression analysis showed concentration increasing of zinc in P. australis organs under these metal stress condition were fitted as a quadratic function with R2 >90 (p<0.01). In summary results of this research show high relatively resistant of P. australis to zinc stress as necessary metal in plants, high accumulation capacity for metal in its root organ and low heavy metal translocation factor.

Antropogenic heavy metals discharge in to the precious environment has been a key burden of modernity. Excess trace elements have driven the fertile soil and water mediums in to unstable and fragile states in many countries. In recent years bio-remediation approaches via various plants species, has been highlited as prior strategies in soil pollution control.

The present study aims to assess phytoremediation of Pharagmites australis (common reed) for lead contamination in constructed wetland. Experimental design was performed in an entirely randomized plan having two factors and three replications. Accordingly lead and levels of metal stress were obtained.   

According to indoor expriments results, any increment in lead concentration enhances root-shoot metal absorbing. However, impressive accumulation of heavy metals was in roots and its translocation and accumulation in shoot was reported in lesser portions. Results of regression analysis showed concentration increment of lead in P.australis organs under these metal stress condition which was fixed as a quadratic function with R2 >90 (p<0.01).

P.australis showed high relatively resistant to lead stress. High accumulation capacity for metals in roots and low heavy metal translocation factor were observed during the present study.