Interactions of mycorrhizal fungi with Pteris vittata (As hyperaccumulator) in As-contaminated soils

• Published in: Environmental pollution (1987) Vol. 139; no. 1; pp. 1 - 8
• Main Authors: Leung, H.M., Ye, Z.H., Wong, M.H.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2006; Elsevier
• Subjects: Applied sciences; Arsenic; Arsenic - pharmacokinetics; bioaccumulation; Biological and medical sciences; Biomass; Biotechnology; Brake fern; Cynodon - metabolism; Cynodon dactylon; Decontamination. Miscellaneous; Earth sciences; Earth, ocean, space; Engineering and environment geology. Geothermics; Environment and pollution; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; Hydrogen-Ion Concentration; Hyperaccumulator; Industrial applications and implications. Economical aspects; metal tolerance; Metals - analysis; mine spoil; mined soils; Mining; Miscellaneous; Mycorrhizae; Mycorrhizae - physiology; mycorrhizal fungi; Mycoses - metabolism; Mycoses - microbiology; Phosphate; phytoremediation; Plant Diseases - microbiology; Plant Roots - metabolism; Plant Roots - microbiology; Plant Shoots - metabolism; Plant Shoots - microbiology; polluted soils; Pollution; Pollution, environment geology; Pteris - metabolism; Pteris vittata; Soil - analysis; Soil and sediments pollution; Soil Pollutants - pharmacokinetics; soil pollution; vesicular arbuscular mycorrhizae; China; Brake fern; Arsenic; Mycorrhizae; Phosphate; Hyperaccumulator; Monocotyledones; In situ; Soil pollution; Arsenic: Brake fern; Phytoextraction; Fungi; Cynodon dactylon; Decontamination; Gramineae; Angiospermae; Bioremediation; Mycorrhizae: Phosphate; Filicineae; Thallophyta; Translocation; Pteridophyta; Phytoremediation; Trace element; Endomycorrhiza; Mycorrhiza; Spermatophyta; Biological accumulation; Performance
• ISSN: 0269-7491; 1873-6424
• DOI: 10.1016/j.envpol.2005.05.009

A greenhouse trial was conducted to investigate the role of arbuscular mycorrhizas (AM) in aiding arsenic (As) uptake and tolerance by
Pteris vittata (As hyperaccumulator) and
Cynodon dactylon (a multi-metal root accumulator). Plants inoculated with lived and killed native mycorrhizas isolated from an As mine site were grown in a sterile and slightly acidic soil. The infectious percentage of mycorrhizas (0
mg/kg As: 26.4%, 50
mg/kg As: 30.3%, 100
mg/kg As: 40.6%) and the average biomass of shoots in infected
P. vittata increased (0
mg/kg As: 2.45
g/pot, 50
mg/kg As: 2.48
g/pot, 100
mg/kg As: 10.9
g/pot) according to the increase of As levels when compared to control. The indigenous mycorrhizas enhanced As accumulation (0
mg/kg As: 3.70
mg/kg, 50
mg/kg As: 58.3
mg/kg; 100
mg/kg As: 88.1
mg/kg) in the As mine populations of
P. vittata and also sustained its growth by aiding P absorption. For
C. dactylon, As was mainly accumulated in mycorrhizal roots and translocation to shoots was inhibited.
Indigenous mycorrhizal fungi play an important role in As tolerance.