An inverse relation between Pb2+ and Ca2+ ions accumulation in Phaseolus mungo and Lens culinaris under Pb stress.
Year: 2009
Type: article
Abstract: This study focuses attention on accumulation of Pb in root and shoot of Phaseolus mungo and Lens culinaris in relation with Ca from nutrient solution in which PbCl2 was added. The plants were cultivated in natural environment. It was observed that Pb physically blocks water uptake which results in decline length of root and shoot with reduced leaf size of both species. This may be attributed with reduced fresh weight, and ratio of dry and fresh weight of two species. The accumulation trend of Pb and Ca showed a linear relation in between applied dose and accumulation of Pb in Phaseolus mungo and Lens culinaris which inversely related with Ca contents of both members of Fabaceae family. The reduced Ca contents was due to chemical similarities in between the oxidation states of two ions but smaller ionic radius and high density of Pb helps in accumulation of it in tissues of both species. These interactions may occur at the cellular and molecular level and are the abilities of Pb to displace Ca during specific physiological process. It is likely that Pb blocks Ca efflux from cells by substituting Ca in Ca / Na during some enzymatic activity.
Source: Pakistan Journal of Botany
Authors: Rafia Azmat, Saba Haider, Mareena Riaz
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W129813638