Effects of Fe plaque and organic acids on metal uptake by wetland plants under drained and waterlogged conditions

2017 ◽  
Vol 231 ◽  
pp. 732-741 ◽  
Author(s):  
W.C. Li ◽  
H. Deng ◽  
M.H. Wong
Keyword(s):  
Organic Acids ◽  
Metal Uptake ◽  
Wetland Plants ◽  
Fe Plaque

scholarly journals Iron-Oxidizing Bacteria Are Associated with Ferric Hydroxide Precipitates (Fe-Plaque) on the Roots of Wetland Plants

1999 ◽  
Vol 65 (6) ◽  
pp. 2758-2761 ◽  
Author(s):  
David Emerson ◽  
Johanna V. Weiss ◽  
J. Patrick Megonigal
Keyword(s):  
Ferric Hydroxide ◽  
Root Systems ◽  
Wetland Plants ◽  
Positive Correlation ◽  
Cell Numbers ◽  
Iron Oxidizing Bacteria ◽  
Soil Solutions ◽  
Fe Plaque ◽  
Ph Range

ABSTRACT The presence of Fe-oxidizing bacteria in the rhizosphere of four different species of wetland plants was investigated in a diverse wetland environment that had Fe(II) concentrations ranging from tens to hundreds of micromoles per liter and a pH range of 3.5 to 6.8. Enrichments for neutrophilic, putatively lithotrophic Fe-oxidizing bacteria were successful on roots from all four species; acidophilic Fe-oxidizing bacteria were enriched only on roots from plants whose root systems were exposed to soil solutions with a pH of <4. InSagittaria australis there was a positive correlation (P < 0.01) between cell numbers and the total amount of Fe present; the same correlation was not found for Leersia oryzoides. These results present the first evidence for culturable Fe-oxidizing bacteria associated with Fe-plaque in the rhizosphere.

Iron plaque formation on wetland plants and its influence on phosphorus, calcium and metal uptake

2009 ◽  
Vol 43 (4) ◽  
pp. 879-890 ◽  
Author(s):  
Fu Ying Jiang ◽  
Xin Chen ◽  
An Cheng Luo
Keyword(s):  
Metal Uptake ◽  
Plaque Formation ◽  
Wetland Plants ◽  
Iron Plaque

PREDICTING METAL UPTAKE BY WETLAND PLANTS UNDER AEROBIC AND ANAEROBIC CONDITIONS

2007 ◽  
Vol 26 (4) ◽  
pp. 686 ◽  
Author(s):  
Marlies E.W. van der Welle ◽  
Jan G.M. Roelofs ◽  
Huub J.M. Op den Camp ◽  
Leon P.M. Lamers
Keyword(s):  
Metal Uptake ◽  
Wetland Plants ◽  
Anaerobic Conditions ◽  
Aerobic And Anaerobic ◽  
Aerobic And Anaerobic Conditions

Copper uptake in Typha latifolia as affected by iron and manganese plaque on the root surface

2001 ◽  
Vol 79 (3) ◽  
pp. 314-320 ◽  
Author(s):  
Z H Ye ◽  
K C Cheung ◽  
M H Wong
Keyword(s):  
Heavy Metal ◽  
Metal Uptake ◽  
Typha Latifolia ◽  
Root Surface ◽  
Copper Uptake ◽  
Wetland Plant ◽  
Heavy Metal Uptake ◽  
Fe Plaque ◽  
Solution Cultures ◽  
Iron And Manganese

The effects of iron (Fe) and manganese (Mn) plaque on the accumulation of copper (Cu) in Typha latifolia L. were investigated under laboratory conditions in nutrient solution cultures. Seedlings with and without Fe plaque on their roots, induced with 15 or 60 µg·mL–1 Fe, were exposed to 0.04, 0.12, or 0.36 µg·mL–1 Cu solutions, and seedlings with and without Mn plaque, induced with 15 or 60 µg·mL–1 Mn, were exposed to 0.12 or 0.36 µg·mL–1 Cu solutions for 24 days, respectively. In all cases, the amount and proportion of Cu adsorbed on the root surface increased with a higher concentration of Cu in the solutions. In the presence of Fe or Mn, T. latifolia adsorbed more Cu and had a higher proportion of Cu on its roots, especially the roots with heavy Mn or Fe plaque. Although more Fe than Mn accumulated on the roots in the form of plaque, the Mn plaque adsorbed more Cu. The data suggest that root plaque can act as a Cu reservoir, depending on the amount of Fe or Mn on the roots and the amount of Cu in the environment.Key words: wetland plant, heavy metal uptake, cattail, iron plaque, manganese plaque.

Metal uptake by wetland plants: implications for phytoremediation and restoration

2016 ◽  
Vol 17 (5) ◽  
pp. 1384-1393 ◽  
Author(s):  
Carmen Pérez-Sirvent ◽  
Carmen Hernández-Pérez ◽  
María José Martínez-Sánchez ◽  
Mari Luz García-Lorenzo ◽  
Jaume Bech
Keyword(s):  
Metal Uptake ◽  
Wetland Plants

scholarly journals Availability and Plant Uptake of Biosolid-Borne Metals

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Bon-Jun Koo ◽  
Andrew C. Chang ◽  
David E. Crowley ◽  
Al L. Page ◽  
Alexandria Taylor
Keyword(s):  
Organic Acids ◽  
Metal Uptake ◽  
Growth Period ◽  
Cultivar Differences ◽  
Sand Culture ◽  
Standard Medium ◽  
Organic Acid Production ◽  
First Order ◽  
Metal Element ◽  
Kinetics Of

Metal uptake by different plant species was quantified in sand media amended with biosolids in a sand-culture hydroponic medium. In a previous paper (Koo et al. 2006), we concluded that total quantities of organic acids were greatest in treatments containing both plants and biosolids, with lesser amounts in treatments with plants alone, biosolids-treated media alone, and a nutrient solution-irrigated blank medium. Biosolids enhanced organic acid production in the rhizosphere. The purpose of this study was to evaluate how organic acids in root exudates affect the absorption of metals by selected plants. We found that the concentrations of metals in the plant tissue grown on biosolids-treated medium were always higher than that from the standard medium, irrespective of species and cultivar. The amount of metal transferred from the biosolids-treated medium to the plant varied with the metal element, following the order: Cd > Ni = Zn > Cu > Pb > Cr. Interspecies and cultivar differences in metal uptake were trivial compared to differences induced by the treatment. The metal uptake decreased with the growth period, and the kinetics of metal uptake, as indicated by accumulation in corn shoots, were essentially a first order during the initial 4 weeks of growth, especially for Cd and Zn.

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