Effects of Tillage System and Cultivation Year on Secondary Metabolites and Antioxidant Capacity of Durum Wheat under Rainfed Conditions

Abstract

One of the proposed solutions to face climate change impact and to maintain food production sustainability is conservation agriculture. This study tries to determinate the effect of conventional tillage (CT) and no tillage (NT) on secondary metabolites such as total phenolics content (TPC), total flavonoids content (TFC) and antioxidants capacity (DPPH %) in relation to natural mycorrhization of durum wheat during the tillering stage for three cultivation years. The experiment was conducted in a referential farm (Krib, Siliana, North West Tunisia). The results showed that TPC, TFC and DPPH% were not influenced by tillage system (T). However, cultivation year (Y) had a significant effect on the studied parameters independently of tillage system. In addition, for the first cultivation year, tillage system (T) had significantly influenced the mycorrhization rate (MR%) and NT presented the highest mycorrhization rate (24%). DPPH% showed high significant positive correlations with MR% and TPC. For partial correlation based on Tillage system, high positive correlations were noted between DPPH%, MR% and TPC. Considering the partial correlation based on cultivation year, only a significant positive correlation between TPC and TFC was observed. In conclusion, durum wheat quality was not affected by tillage system and there are not reasons against no tillage adoption in this region for a sustainable wheat production.

Natural Mycorrhization, Mineral Uptake, Total Polyphenols and Total Flavonoids of Oat as Affected by Tillage Practices under Rainfed Conditions

“…These results are similar to those of Chaieb et al [40], Chaieb et al [44] who reported that under no tillage durum wheat and barley TPC at maturity stage and tillering stage did not show significant variability. Furthermore, Stake et al [45] foundd that management operations did not alter wheat phytochemicals concentrations.…”

“…Thus, analysis of variance of TFC showed that the effect of tillage is no significant. These results are similar to those of Chaieb et al [40] and Chaieb et al [44] who found that tillage system did not affect significantly durum wheat and barley TFC at maturity satge and tillering stage as affected. As well, Stracke et al [45] reported that mangement operations did not affect wheat phytochemicals concentrations.…”

Mineral Uptake, Total Polyphenols and Total Flavonoids of Barley as Affected by Tillage Practices under Semi-Arid Conditions

“…These results are in accoradance with those of Chaieb et al [32] and Chaieb et al [36] who studied durum wheat TPC respectively at maturity satge and tillering stage as affected by tillage systems and found that no significant effects were noted. In similar, Stake et al [37] recorded that mangement operations did not influence wheat phytochemicals concentrations.…”