Efeito de doses de fósforo na mobilidade do arsênio e no desenvolvimento de duas essências florestais (Phosphorus doses effect on the arsenic mobility and the development of two forest essences)

Abstract

Efeito de doses de fósforo na mobilidade do arsênio e no desenvolvimento de duas essências florestais

Uroclhoa mosambincensis: A potential native phytoremediator for soils contaminated with arsenic

“…A decrease by 34.7, 30.6 and 17.4% was observed in root biomass and by 27.6, 16.3 and 35.9% in total plant biomass in all As concentrations when compared with control treatment. This is in line with Melo et al (2018), who observed a decrease by 63 and 59% in roots, and 60 and 63% in shoots of Anadenanthera peregrina. But an increase of root biomass was also found with the increase of arsenic and the opposite behavior in stem biomass.…”

“…On the other hand, U. mosambicensis can be considered an accumulator, since it was found that it grows in As-contaminated soils with a concentration of 800 mg.kg -1 As 2 O 3 (Da Silva, 2012), showing no evident signs of phytoxicity. This fact is confirmed by Melo et al (2018), indicating that plants growing in contaminated soil with a concentration limit of 400 mg.kg -1 of As showed tolerance. However, other authors consider As hyperaccumulating plants as those that are able to naturally accumulate more than 1000 mg.kg -1 of As in dry matter (Ma et al, 2001;Gonzaga et al, 2006Gonzaga et al, , 2008.…”

“…This fact is also supported by Melo et al (2009), using different As concentrations, they observed an increase of As in Ricinus communis and Helianthus annus tissues by 85.31 and 79.69%, in Oxisol and 32.31% and 26.03% in Entisol, respectively. This was also proven by Melo et al (2018), observing an expressive translocation of As was observed to the aerial part of the plant Anadenanthera peregrina.…”

“…In a study in which several trace elements such as As were used in different plants, including Medicado sativa and Phaseolus vulgaris, it was demonstrated that the biomass was reduced in contaminated soils. Contrary to what happens with other trace elements, As is not used as a nutrient by plants and its phytotoxic effect is well known (Melo et al, 2018).…”