A Modelling Approach: Effects of Exuded Organic Acids and Exogenous Chelating Ligands on Bioavailability and Uptake of Metals by Radishes (Raphanus sativus) Grown in Hydroponics
نویسندگان
چکیده
......................................................................................................................... i Acknowledgments......................................................................................................... ii Table of contents .......................................................................................................... iii List of tables ................................................................................................................ vii List of figures ............................................................................................................. viii List of appendices ........................................................................................................ ix Chapter 1 ........................................................................................................................ 1 1 General Introduction ................................................................................................. 1 1.1 Overview ............................................................................................................ 1 1.2 Factors that affect metal bioavailability ............................................................. 2 1.3 Metals in the plant environment ........................................................................ 3 1.3.1 Effects of metals on plants ..................................................................... 3 1.4 Use of chelators in phytoremediation ................................................................ 4 1.5 Chelators exuded from plant roots ..................................................................... 7 1.6 Study species ...................................................................................................... 8 1.7 Role of software modelling ................................................................................ 9 1.8 Objectives .......................................................................................................... 9 1.9 Rationale for experiments ................................................................................ 10 Chapter 2 ...................................................................................................................... 11 2 Modelling software: Visual MINTEQ 3.1 .............................................................. 11 2.1 Visual MINTEQ 3.1......................................................................................... 11 2.1.
منابع مشابه
Root-uptake of 14C derived from acetic acid by root vegetables
Sand culture using radish (Raphanus sativus L.) and hydroponics using carrot (Daucus carota L.) were conducted to examine root-uptake of carbon and its assimilation in the form of 14C-acetic acid. 14C-acetic acid (1, 2-14C, radioactivity: 74 kBq) was added to each pot. Radishes were grown under the dark conditions or the light conditions for 24 h. Carrot were grown under the light conditions af...
متن کاملاثر متیل جاسمونات بر جذب و تجمع سرب در گیاه تربچه (Raphanus sativus L.)
Heavy metals are the most important pollutants in the environment. The productiion of toxic metals by human activities has lead to the contamination of soil. The presence of these metals in the soil and their accumulation in plants grown on these soils will have adverse effects on humans and animals. One approach to reduce the accumulation of heavy metals in plants is using of plant hormones. T...
متن کاملAbsence of plant uptake and translocation of polybrominated biphenyls (PBBs).
Studies of polybrominated biphenyl (PBB) uptake by plants have been conducted in hydroponic solutions and in greenhouse experiments with soil. Autoradiograms of corn and soybean seedlings grown in hydroponic solutions showed no translocation of 14C-PBB from 14C-PBB-treated solutions to plant tops or within the leaf from 14C-PBB-treated spots on the upper leaf surface. A significant portion of t...
متن کاملمقایسه آثار افزودن اسید سیتریک و کیلیتهای مصنوعی بر افزایش پالایش گیاهی کادمیوم از خاک
In this study, the effects of enhancing synthetic chelators (HEDTA, EGTA) and low molecular weight organic acids (LMWOA) such as citric acid were compared on cadmium (Cd) solution in soils that were artificially contaminated. Also Cd phytoextraction capability by radish (Raphanus Sativus L.) was studied. The experiment was laid out in a randomized complete factorial design where each treatment ...
متن کاملApplication of exogenous organic acids and remediation process of lead and cadmium contamination in canola plants. Hakimeh Oloumi*, Effat Ahmadi Mousavi and Neda Hasibi
Heavy metal contamination of soil, water and air has caused serious environmental hazard in the biosphere due to rapid industrialization and urbanization. A variety of metal binding ligands such as organic acids and amino acids involve in the heavy metal remediation mechanisms by plants. This paper analyses the possible role of amino acid histidine and organic acids, namely, citric, oxalic and ...
متن کامل