Vermicompost dose and mycorrhization determine the efficiency of copper phytoremediation by Canavalia ensiformis

Abstract

The phytoremediation of copper (Cu)-contaminated sandy soils can be influenced by the addition of vermicompost to the soil and the mycorrhization of plants. The objective of this study was to evaluate the effects of inoculation with the mycorrhizal fungus Rhizophagus clarus and the addition of different doses of bovine manure vermicompost on the phytoremediation of a sandy soil with a high Cu content using Canavalia ensiformis. Soil contaminated with 100 mg kg Cu received five doses of vermicompost and was cultivated with C. ensiformis, with and without inoculation with mycorrhizal fungus, and the Cu and nutrients in the soil and soil solution were evaluated. The concentrations of Cu and other nutrients and the biomass and Cu phytotoxicity in the plants were quantified by gauging the photochemical efficiency, concentration of photosynthetic pigments and activity of oxidative stress enzymes. The vermicompost increased the soil pH and nutrient concentrations and reduced the Cu content of the solution. When the vermicompost was applied at a dose equivalent to 80 mg phosphorus (P) kg, the phytoextraction efficiency was higher, but the phytostabilization efficiency was higher for vermicompost doses of 10 and 20 mg P kg. The presence of mycorrhizal fungi increased Cu phytostabilization, especially at vermicompost doses of 10 and 20 mg P kg. The use of vermicompost at low doses and inoculation with mycorrhizal fungi increase the phytostabilization potential of C. ensiformis in sandy soil contaminated by Cu.

Use of mycorrhizal fungi releases the application of organic fertilizers to increase the production of leaf vitexin in yellow passion fruit

“…Although the application of fertilizers did not interfere with the production of mycorrhizal structures (Table ), it was verified that inoculated plants generally accumulated more biomolecules (Tables and ), in agreement with reports by Loit et al and Santana et al This advantage has been reported in some studies, and it is believed that an increase in the production of signaling molecules, activation of key enzymes of the metabolic pathways, modulation in the gene expression of important enzymes of the anabolic routes, hormonal alterations, and the plant's defense response may be competing for the observed optimization (Tables and ).…”

Effect of Vermicompost Associated With Mycorhizal Fungi on the Growth of Eggplant in Organic Greenhouse Agriculture

“…The synergy between vermicompost and mycorhization results in excellent biomass production. This is in agreement with data in literature (Santana et al, 2018, Oliveira et al, 2015, whose results also indicate a significant increase in plant dry biomasses. However, other studies found conflicting results.…”

Valor De Uso De Planta Da Família Araceae Na Região De Munguba/Porto Grande/ Ap

“…We also used sand as substrate, and after 17 days, our results showed that height reached from 11.7 to 17.4 cm. This suggests that other substrates may be used and subsequently evaluated for their contribution to better seedling development of C. ensiformis after germination It is worth mentioning that C. ensiformis is a plant that presents tolerance and growth in different environments, and its phytoremediative capacity for some contaminants has been reported, such as diesel oil (BALLIANA et al, 2017), lead (Pb) (ALMEIDA et al, 2008), copper (Cu) (SANTANA et al, 2018), and cadmium (Cd) (FRANCATO ZANCHETA et al, 2015). This species has also shown efficient phytoremediation of herbicides, including trifloxysulfuron sodium (PIRES et al, 2003), atrazine (ARTHUR et al, 2000), imazethapyr and imazapic (SOUTO et al, 2015).…”