Physiological Response at Different Plant Development Stages in Glycine max Exposed to Elevated CO2 Concentrations and Fly Ash-Amended Soils

Abstract

Increasing concentrations of carbon dioxide and heavy metals in soils through pollution are serious problems worldwide. In the present study, we investigated the impacts of elevated atmospheric CO 2 and fly ash (FA)-amended soil on the physiological response (chlorophyll content, non-structural carbohydrates, oil and total proteins) of soybean [Glycine max (L.) Merrill] at three growth stages (vegetative, reproductive and maturity). An increase in plant growth and biomass was observed at elevated CO 2 and for moderate concentrations of FA in amended soils in all development plant stages. In contrast to these results, a different response pattern was found for the chlorophyll content and non-structural carbohydrates in relation to the developmental stage, showing that even though in the vegetative growth stage the highest concentration of chlorophylls corresponded to elevated CO 2 conditions. An opposite result was observed during the grain filling stage (reduction of chlorophylls of 15 % at ambient CO 2 conditions for the treatments 10, 15, and 25 % of FA), which probably is related with the distribution of nutrients at this stage. Regarding to oil and total protein content an increase was observed at elevated CO 2 and high concentrations of FA in amended soils. Our findings demonstrate that elevated CO 2 and FA-amended soils alter the physiological response of soybean affecting the crop quality.

Multidisciplinary study of chemical and biological factors related to Pb accumulation in sorghum crops grown in contaminated soils and their toxicological implications

“…p<0.001). These results indicate a lower crop quality when Pb bioavailability was enhanced in soils, with similar results having been previously reported for soybean (Rodriguez et al, 2015;Rodriguez et al, 2014), and tea plants (Yongsheng et al, 2011).…”

Seed quality under elevated CO2 differs in soybean cultivars with contrasting yield responses

“…Seed oil content decreased under eCO 2 in our study, with Loda showing the strongest decline (Figure 1). This result also differs from previous observations where oil content was reported to either increase (Fiscus et al., 2007; Hao et al., 2014; Li et al., 2018; Singh et al., 2016) or stay the same (Rodriguez et al., 2015; Soares et al., 2019; Thomas et al., 2003) at eCO 2 . Soybean oil content typically ranges between 15% and 23%, with high oil content cultivars showing >20% (Priyanatha et al., 2022; Yang et al., 2023).…”

“…Maintaining and continuing to improve seed quality in soybean as the global climate changes is important to multiple industries. The effects of eCO 2 on soybean oil content have been inconsistent, either remaining stable or increasing in response to eCO 2 (Li et al., 2018; Qiao et al., 2019; Rodriguez et al., 2015). A decline in soybean seed quality is concerning for both food and feed.…”

Investigate the influence of halloysite and activated carbon mixtures in phytostabilization of Pb-contaminated soil with Lolium perenne L.

“…In the pot, to which the highest dose of lead was applied (800 mg·kg -1 of soil), a signifi cant decrease in plant yield occurred as compared to the control se-ries. Lower crop quality when lead bioavailability increased in soils was reported by Yongsheng et al (2011), Rodriguez et al (2015) and Blanco et al (2016). When found in excessive amounts in soil, lead negatively infl uences the fundamental life processes of plants, causing, among others, disruptions in photosynthesis, cell division, nitrogen metabolism and water balance (Smolders et al 2015, Dikilitas et al 2016).…”