Abstract
Abstract This study was conducted to assess the physicochemical characteristics of urban forest soil contaminated by copper and the dynamics of macro- and micronutrients uptake by Schinus terebinthifolia and Eugenia uniflora seedlings. The seedlings received 0 (control), 60, 120, 180 or 240 mg Cu kg-1 soil applied to urban forest soil within Sao Paulo City, Brazil. Our results showed that K was reduced in Cu-contaminated soil used for S. terebinthifolia cultivation and that organic matter was higher in Cu- contaminated soil used for E. uniflora cultivation. Other physicochemical properties of soil remained unaltered. S. terebinthifolia presented nutritional imbalances in N, K and Mg on leaves, while E. uniflora presented nutritional imbalances in K on leaves and in S on roots. It can be concluded that copper contamination can negatively affect chemical and nutritional characteristics of urban forest soil, as well as the nutritional dynamics of S. terebinthifolia and E. uniflora.
Highlights
AND OBJECTIVESCopper (Cu) is an essential micronutrient for plant growth and development, playing key roles in several physiological processes, such as cell respiration, photosynthesis, ATP generation (Marques et al, 2018), participation in redox reactions and in oxidative stress protection (Rehman et al, 2019)
Our results showed that K was reduced in Cu-contaminated soil used for S. terebinthifolia cultivation and that organic matter was higher in Cu- contaminated soil used for E. uniflora cultivation
O.M. levels in the soil cultivated with E. uniflora showed an increase after treatment with 240 mg Cu kg-1 when compared to 180 mg Cu kg-1, while no change in O.M. levels was observed in the soil cultivated with S. terebinthifolia (Table 3)
Summary
AND OBJECTIVESCopper (Cu) is an essential micronutrient for plant growth and development, playing key roles in several physiological processes, such as cell respiration, photosynthesis, ATP generation (Marques et al, 2018), participation in redox reactions and in oxidative stress protection (Rehman et al, 2019). The degree of nutritional imbalance caused by Cu toxicity in plants is dependent on environmental factors, including the concentration and bioavailability of Cu in soil, length of exposure to heavy metal, and environmental growth conditions, as well as the morphophysiological characteristics of each plant species (Adrees et al, 2015). Urban forest fragments are remnants of native and secondary forests inserted in the urban environment. These fragments play a specific role in the existence and long-term maintenance of ecosystem services, conservation of biodiversity and habitat for several plant species (Dislich & Pivelo, 2002). The sheer proximity of various pollutants places urban forest fragments at risk of particulate material from the emissions of automotive fleets
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