Effects of arbuscular mycorrhizal fungi inoculation on arsenic accumulation by tobacco (Nicotiana tabacum L.)

The symbiosis between Nicotiana tabacum and the endomycorrhizal fungus Funneliformis mosseae increases the plant glutathione level and decreases leaf cadmium and root arsenic contents

“…1C). This is in accord with Hua et al (2009), who found a significantly higher concentration of As in roots of non-mycorrhized adult plants of tobacco, grown for 13 weeks in As-contaminated soil, when compared with leaves. Our results show that, when As V was supplied at 30 mM, the mycorrhization led to a marked reduction of As content in roots, while the process did not influence As content in leaves (Fig.…”

“…Fm effectively limited the uptake of elevated As V concentrations through the roots, presumably immobilizing it in the cell wall or inside the extraradical mycelium, whose growth is not expected to change significantly in the presence of As V , as is the case with the intraradical part. Another possible explanation may be related to a pH decrease in the rhizosphere, because AM fungi exude organic acids to cope with metal(loid) toxicity (Garg and Bhandari, 2014) and also modify the amount and composition of root exudates, thus leading to a decreased availability of As (Hua et al, 2009). Not least, these fungi may regulate P i uptake, so as to downregulate As V transport into the host (Xu et al, 2008).…”

“…Thus, AMmycorrhized plants often show an enhanced metal(loid) tolerance (Garg and Bhandari, 2014;G€ ohre and Paszkowski, 2006, and references therein). However, the role of these fungi in the plant uptake and translocation of Cd is not clear, as it is influenced by many factors (Garg and Bhandari, 2014;Janou skov a et al, 2005), and there are few data on As, particularly as regards nonhyperaccumulator plants (Hua et al, 2009;Liu et al, 2005). In the As-hyperaccumulator fern Pteris vittata, hosting the AM symbiosis with Glomus mosseae (now renamed Funneliformis mosseae, see the M&M subsection 2.1.…”

Arsenic toxicity in crop plants: physiological effects and tolerance mechanisms

“…Several studies have shown enhanced plant tolerance to As resulting from inoculation with arbuscular mycorrhizae fungi (Gonzalez-Chavez et al 2002;Chen et al 2007;Hua et al 2009;Smith et al 2010). Arbuscular mycorrhizae fungi have also been reported to reduce plant uptake of As such as by the fern Pteris vittata L., lentil, alfalfa, tomato, and sunflower.…”

Synergistic effects of arbuscular mycorrhizal fungi and phosphate rock on heavy metal uptake and accumulation by an arsenic hyperaccumulator

“…It has been indicated that AM fungi can colonize plant roots in metal contaminated soil [11][12][13][14][15][16][17][18][19][20][21][22][23] and it has been commonly observed that AM fungi increases shoot uptake of metals [24][25] in severely contaminated soils. In addition, AM fungi could protect plants against harmful effects of metals [26] and respond to water deficit at morphological, anatomical and cellular levels with modifications.…”