Response of Cajanus cajan to excess copper in the soil: tolerance and biomass production

Autor(es)

da Silva, Mariana Bocchi ; Pires Bomfim, Nayane Cristina ; da Silva, Victor Navarro ; Frachia, Caroline de Lima ; de Souza, Lucas Anjos ; Justino, Gilberto Costa ; de Camargos, Liliane Santos

• Tipo de documento: Artigo Científico
• Fonte: PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS; v. 28, n. 6, p. 11-pg., 2022-07-08.

Resumo

Soil contamination by excess heavy metals or trace elements is a global concern, as these elements are highly bioaccumulated in living organisms, migrating throughout the food chain, and causing health problems. Sustainable technologies, using plants, have been increasingly studied and used to contain, reduce, or extract these elements from the soil. In this sense, it is essential to identify plant species that tolerate certain elements, present high biomass production and are resistant to adverse soil conditions. For this reason, we evaluated the biomass production and tolerance of Cajanus cajan in response to different concentrations of copper (30, 60, 120, and 240 mg/dm(3), in addition to the control treatment) in the soil, as well as the effect of this metal on photosynthetic pigments and gas exchange. C. cajan was sown in soil previously contaminated with copper sulfate and cultivated in a greenhouse for 60 days after emergence. C. cajan is copper tolerant, approximately 88% copper is accumulated in the roots and therefore there is low copper translocation to the shoot, consequently, the chlorophyll content, the net photosynthesis rate, carbon assimilation, dry biomass, the root system development, and nodulation were not affected by copper. C. cajan can be explored in strategies to improve soil conditions and is a promising species in soil phytoremediation studies. (AU)

• Processo FAPESP: 18/01498-6 - Avaliação do potencial fitorremediador de leguminosas tropicais em solos contaminados com cobre, boro e manganês
• Beneficiário: Liliane Santos de Camargos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/01234-9 - Capacidade de crescimento, nodulação e potencial para fitorremediação de Cajanus cajan em solos contaminados por cobre
• Beneficiário: Mariana Bocchi da Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica