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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Characterization of biomass sorghum for copper phytoremediation: photosynthetic response and possibility as a bioenergy feedstock from contaminated land

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Autor(es):
Lima, Leticia Rigonato [1] ; Silva, Higor Ferreira [1] ; Brignoni, Alcindo Souza [1] ; Silva, Fabiano Guimaraes [1] ; Camargos, Liliane Santos [2] ; Souza, Lucas Anjos [3]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Inst Fed Educ Ciencia & Tecnol Goiano, Campus Rio Verde, Rio Verde, GO - Brazil
[2] Univ Estadual Paulista UNESP, Fac Engn, Dept Biol & Zootecnia, Lab Fisiol Metab Vegetal, Ilha Solteira, SP - Brazil
[3] Inst Fed Educ Ciencia & Tecnol Goiano, Polo Inovacao Bioenergia & Graos, Campus Rio Verde, Rio Verde, GO - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS; v. 25, n. 2, p. 433-441, MAR 2019.
Citações Web of Science: 3
Resumo

In order to decrease the concentration of toxic metals in contaminated lands, phytoextraction can be suitable considering the use of plant species with high potential for biomass production, such as biomass sorghum (Sorghum bicolor L.). We assessed a biomass sorghum (BRS716) potential as a copper phytoextractor as well as the physiological stability under this stressful condition. A completely randomized experimental design was used for a greenhouse experiment in which sorghum plants were submitted to a range of Cu2+ concentrations: 2.3, 10.9, 19.6, 30.5, 37.6 and 55.6mgdm(-3). The plant growth was not affected by increasing Cu2+ concentrations, suggesting that this species is tolerant to copper. There was a decrease in photosynthetic rate according to the increase in Cu2+ concentration, but not at a level that could disturb plant metabolism and eventual death. The values obtained for transfer index ranged from 0.62 to 0.11 which evidenced the restriction of Cu2+ transport to the aerial parts. The more Cu2+ available in soil, the smaller the amount of Cu2+ transported to aerial partsof sorghum. So, our results show that biomass sorghum has potential to be used for Cu2+ phytoextraction in concentration of up to 20mgdm(-3). Also, in heavily Cu2+ polluted sites, it can be used to produce biomass for bioenergy purpose, promoting a low rate of Cu2+ extraction. (AU)

Processo FAPESP: 15/09567-9 - Avaliação do potencial fitorremediador de leguminosas arbóreas em solo contaminado com chumbo e seu uso combinado com Stizolobium aterrimum, forrageira tolerante ao chumbo
Beneficiário:Liliane Santos de Camargos
Linha de fomento: Auxílio à Pesquisa - Regular