Copper use efficiency in soybean cultivars

Abstract

The objective of this work was to evaluate the effect of copper use efficiency in soybean cultivars, grown on a typical Ultisol with a high organic matter content, on soil chemical properties and on plant grain yield, nutritional state, and physiological components. The experiment was carried out in greenhouse conditions, in a 5×4 factorial arrangement, with five soybean cultivars (TMG 1066RR, BRS 360RR, NA 6262RR, BMX Turbo RR, and BRS 359RR) and four Cu rates (0, 2, 4, and 8 mg kg-1). Under the studied soil conditions, the DTPA-TEA and Mehlich-1 extractants were efficient in determining available Cu in the soil. Regardless of the cultivars, Cu application increased grain yield (GY), shoot dry weight yield (SDWY), number of pods per pot, GY/SDWY ratio, photosynthetic rate, stomatal conductance, internal CO2 concentration, transpiration rate, and chlorophyll content. However, Cu use efficiency varied significantly among the different soybean genotypes. Except for Cu, soil chemical attributes and foliar and grain nutrient contents are not influenced by Cu rates nor by soybean cultivars.

Journal of Plant Protection Research

“…Resistance induction (IR) has several latent defense mechanisms in plants that are activated after treatment with biotic or abiotic agents (Bonaldo et al 2005). Resistance induction can be a local protection, occurring only in adjacent tissues treated with the inducing agent, or it may be systemic, manifesting itself at a distance from the inductor's application site (Moraes 1992). In this work, the reduction of disease intensity with flagellin applied in places far from the infection sites, which highlights the nature of the elicitation of induced resistance, since these components significantly reduced the intensity of bacterial spot for flagellin of several isolates.…”

Variation of Some Plant Growth Parameters in Coriander (Coriandrum sativum L.) with Copper Application

“…While the mean dry weight of the plants was 0.239 g in the control, the dry weight of Cu applied plants were varied between 0.435-0.550 g per plant depending on the Cu doses (Figure 7). Previous reports with rice and beans (Fageria, 2002), sweet basil (Ghorbanpour et al, 2016), and (Moreira et al, 2019b), showed that up to a certain Cu dose, increasing concentrations improved shoot dry weight, however, biomass accumulation was reduced at higher doses. The study conducted with Brassica juncea reported that increased Cu applications increased shoot dry weight as well (Chigbo et al, 2013).…”