CNR ExploRA

Articolo in rivista, 2014, ENG, 10.1007/s11356-013-2073-3

Enhancing phytoextraction of Cd by combining poplar (clone "I-214") with Pseudomonas fluorescens and microbial consortia

Cocozza, Claudia; Vitullo, Domenico; Lima, Giuseppe; Maiuro, Lucia; Marchetti, Marco; Tognetti, Roberto

Dipartimento di Bioscienze e Territorio, Università degli Studi del Molise, 86090 Pesche, Italy Dipartimento Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, 86100 Campobasso, Italy The EFI Project Centre on Mountain Forests (MOUNTFOR), Edmund Mach Foundation, 38010 San Michele all'Adige, Italy

The plant-microorganism combinations may contribute to the success of phytoextraction of heavy metal-polluted soil. The purpose of this study was to investigate the effects of cadmium (Cd) soil concentration on selected physiological parameters of the poplar clone "I-214" inoculated at root level with a strain (BT4) of Pseudomonas fluorescens and a commercial product based on microbial consortia (Micosat F FitoA (R)). Plants were subjected to Cd treatment of 40 mg kg(-1) in greenhouse. The effects of plant-microbe interactions, plant growth, leaf physiology, and microbial activity were periodically monitored. Metal concentration and translocation factors in plant tissues proved enhanced Cd uptake in roots of plants inoculated with P. fluorescens and transfer to shoots in plants inoculated with Micosat F FitoA (R), suggesting a promising strategy for using microbes in support of Cd uptake. Plant-microbe integration increased total removal of Cd, without interfering with plant growth, while improving the photosynthetic capacity. Two major mechanisms of metal phytoextraction inducted by microbial inoculation may be suggested: improved Cd accumulation in roots inoculated with P. fluorescens, implying phytostabilization prospective and high Cd transfer to shoots of inoculated plants, outlining enhanced metal translocation.

Environmental science and pollution research international 21 (3), pp. 1796–1808