Influence of salinity on the growth and heavy metal accumulation capacity of Spirodela polyrrhiza (Lemnaceae)

Authors : Zeliha LEBLEBİCİ, Ahmet AKSOY, Fatih DUMAN

Pages : 215-220

View : 15 | Download : 9

Publication Date : 2011-12-01

Article Type : Research Paper

Abstract :Given that the characteristic of free floating plants to uptake metals can have a positive effect on the efficiency of the remediation process of a wetland, it is important to investigate the factors that may impact the process of uptake of metals by the plants. By conducting this present study over a short duration of time, the effects of salinity on the growth, the content of the photosynthetic pigments insert ignore into journalissuearticles values(chlorophyll a, b, and carotenoid);, and heavy metal uptake by Spirodela polyrrhiza were investigated. It was also observed that at a high level of salinity insert ignore into journalissuearticles values(100 and 200 mM NaCl); the relative growth rate insert ignore into journalissuearticles values(RGR); of the plant decreased. Especially, at a salinity level of 100 mM NaCl, the RGR values were noted to become negative. The content of photosynthetic pigment was negatively correlated with the salt level. Additionally, a high level of salinity was observed to cause a decrease in the accumulation of the metals cadmium insert ignore into journalissuearticles values(Cd); and nickel insert ignore into journalissuearticles values(Ni); by S. polyrrhiza.
Keywords : Key words Spirodela polyrrhiza, heavy metal, salt stress, photosynthetic pigment