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Deram, A; Languereau-Leman, F; Howsam, M; Petit, D; Van Haluwyn, C. 2008. Seasonal patterns of cadmium accumulation in Arrhenatherum elatius(Poaceae): Influence of mycorrhizal and endophytic fungal colonisation. SOIL BIOLOGY & BIOCHEMISTRY. 40(3):845-848. Address: Deram, A, Univ Lille 2, Inst Lillois Ingn Sante, EA 2690,42,Rue Ambroise, F-59120 Lille, France
We investigated the influence of arbuscular mycorrhizae (AM) and dark septate fungi (DSF) colonisation on cadmium (Cd) accumulation in Arrhenatherum elatius from heavy metal-contaminated sites. AM colonisation disappeared when Cd concentrations in soil increased, while DSF infection was weak but constant throughout the experiment indicating that soil heavy metals are toxic to AM but not to DSF. AM colonisation was greatest when plant Cd concentrations were highest providing evidence that AM colonisation may influence Cd accumulation. In addition, the disappearance of AM and the concomitant reduction of Cd in shoots during seed maturation result in our suggestion that seasonal variation in AM may play a role in protecting developing seeds from soil pollution.
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