Studies on the phytoremediation of high saline lands

Abstract

Leather processing industry is known to be associated with the newlinegeneration of liquid waste with high Total Dissolved Solids TDS in newlineparticular salinity Consequently the disposal of the tannery wastewater with newlinehigh salinity has become a major concern for the tanning industry Salicornia newlinebrachiata is an annual halophyte belonging to the Chenopodiaceae family and newlineis distributed throughout the world It is a green jointed vascular flowering newlineand leafless halophytic plant that carries articulated succulent stems newlineThe main objective of this study is to remediate the salinity from newlinetannery wastewater contaminated lands by using S brachiata It was grown in newlinepots fed with varying concentrations of sodium chloride NaCl viz 0 100 newline200 300 400 500 and 600 mM under laboratory conditions for a period of newline90 days The effect of salt stress on morphological and physiological newlinecharacteristic changes of S brachiata in pot study was observed newlineAt every 30 days interval the S brachaita plant samples were newlinecollected and measured the shoot root length and fresh and dry weight of newlinesamplesThe optimal growth of S brachiata plants were observed at 500 mM newlineof NaCl The experimental plants showed a decrease in chlorophyll newlinecarbohydrate lipid contents with an increase in concentration of NaCl newlineHowever accumulation of sodium and chloride protein and proline were newlineincreased by an increase in concentration of NaCl with particular reference to newlinesalinity due to osmotic stress The polypeptide profiling of S brachiata under newlinethe influence of salinity has been analyzed The effect of salinity stress on newlinepolyphenol content and changes in antioxidant enzyme activities were newlineanalyzed Polyphenol content was increased at 600 mM on 90 th day of NaCl newlinetreated S brachiata The antioxidant enzymes such as Polyphenol oxidase newlinePPO Catalase CAT and Superoxide Dismutase SOD were analyzed newlineThe gene sequence of S brachiata was identified using ITS rDNA newlinemarker S brachiata plants were treated with soaking wastewater resulted in newlinedrastic reduction of growth in terms of fresh and dry weight newline newline