Phytoprotective Effect of Arbuscular Mycorrhizal Fungi Species Against Arsenic Toxicity in Tropical Leguminous Species

• Published in: International journal of phytoremediation Vol. 16; no. 7-8; pp. 840 - 858
• Main Authors: Rangel, Wesley de Melo, Schneider, Jerusa, Costa, Enio Tarso de Souza, Soares, Cláudio Roberto Fonsêca Sousa, Guilherme, Luiz Roberto Guimarães, Moreira, Fatima Maria de Souza
• Format: Journal Article
• Language: English
• Published: United States Taylor & Francis Group 2014; Taylor & Francis Ltd
• Subjects: Acacia mangium; Acaulospora; antioxidant enzymes; antioxidants; Antioxidants - metabolism; Arsenic; Arsenic - analysis; Arsenic - metabolism; Arsenic - toxicity; Arsenic content; ascorbate peroxidase; Biodegradation, Environmental; Biomass; biomass production; Bioremediation; Claroideoglomus etunicatum; Colonization; Crotalaria juncea; Enterolobium contortisiliquum; Fabaceae - microbiology; Fabaceae - physiology; Flowers & plants; Fungi; Gigaspora; Glomeromycota - physiology; gold; Gold mines & mining; Indicators; Inoculation; Mining; Mucuna pruriens var. utilis; Mycorrhizae - physiology; mycorrhizal fungi; P/As concentration ratio; Phosphorus - analysis; Phosphorus - metabolism; Phosphorus - toxicity; Phytoremediation; Phytotoxicity; Plant Root Nodulation; Plant Roots - microbiology; Plant Roots - physiology; Plant Shoots - microbiology; Plant Shoots - physiology; Plant species; Plants (organisms); polluted soils; Roots; Shoots; Soil - chemistry; Soil contamination; Soil Pollutants - analysis; Soil Pollutants - metabolism; Soil Pollutants - toxicity; Soils; superoxide dismutase; Symbiosis; toxicity; trace element; Translocation; translocation index
• ISSN: 1549-7879; 1522-6514; 1549-7879
• DOI: 10.1080/15226514.2013.856852

Arbuscular mycorrhizal fungi (AMF) improve the tolerance of hosting plants to arsenic (As) in contaminated soils. This work assessed the phytoprotective effect of Glomus etunicatum, Acaulospora morrowiae, Gigaspora gigantea, and Acaulospora sp. on four leguminous species (Acacia mangium, Crotalaria juncea, Enterolobium contortisiliquum, and Stizolobium aterrimum) in an As-contaminated soil from a gold mining area. AMF root colonization, biomass production, As and P accumulation, as well as arsenic translocation index (TI) from roots to shoots were measured. The AMF phytoprotective effect was assessed by the P/As ratio and the activity of plant antioxidant enzymes. The AMF colonization ranged from 24 to 28%. In general, all leguminous species had low As TI when inoculated with AMF species. Inoculation of C. juncea with Acaulospora sp. improved significantly As accumulation in roots, and decreased the activity of ascorbate peroxidase (APX) and superoxide dismutase (SOD), highlighting its phytoprotective effect and the potential use of this symbiosis for phytoremediation of As-contaminated soils. However, S. aterrimum has also shown a potential for phytoremediation irrespectively of AMF inoculation. APX was a good indicator of the phytoprotective effect against As contamination in C. juncea and A. mangium . In general P/As ratio in shoots was the best indicator of the phytoprotective effect of all AMF species in all plant species.