title: Structural changes in response to bioaccumulation of iron and mercury in Chromolaena odorata (L.) King & Robins.
abstract: A comparative study was designed to elucidate the effect of iron and mercury on the morphological and anatomical changes as well as bioaccumulation potential in Chromolaena odorata. Plants were grown in half-strength Hoagland nutrient medium artificially contaminated with known quantities of HgCl2 (15 μM) and FeCl3 (1000 μM). Bioaccumulation of Hg and Fe was maximum in the root, and comparatively reduced bioaccumulation was recorded in the stem and leaves. Microscopic studies on morphology and anatomy revealed development of trichomes and lenticels on the stem and modified trichomes on leaves. Localized deposits of stained masses in various internal parts of the root, stem and leaf also were observed. Differential adaptation/strategy of C. odorata to attain tolerance towards Hg and Fe and phytoremediation potential of the plant is discussed.
authors.affiliation: Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, C.U. Campus P.O., Kerala, 673635, India.
authors.forename: K S
authors.initials: KS
authors.lastname: Swapna
authors.forename: Nabeesa
authors.initials: N
authors.lastname: Salim
authors.forename: Ratheesh
authors.initials: R
authors.lastname: Chandra
authors.forename: Jos T
authors.initials: JT
authors.lastname: Puthur
mesh_terms: D000222:Adaptation, Physiological; D001673:Biodegradation, Environmental; D036604:Chromolaena / Q000502:physiology*; D004784:Environmental Monitoring; D007501:Iron / Q000032:analysis*; D008628:Mercury / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D018515:Plant Leaves / Q000737:chemistry / Q000648:ultrastructure; D018517:Plant Roots / Q000737:chemistry / Q000648:ultrastructure; D018547:Plant Stems / Q000737:chemistry / Q000648:ultrastructure
chemical_list: D007501:Iron; D008628:Mercury