Title : Enhancing crop tolerance in sodic soils: Insights from wheat genotype responses
Abstract:
Soil sodicity stands as a significant impediment to seedling emergence and crop production, potentially hindering plant growth due to both physical and chemical constraints. Investigating responses to ion imbalances could aid in identifying genotypes resilient to the chemical challenges posed by sodic soils, ultimately enhancing productivity. In our study, we assessed the performance of four wheat (Triticum aestivum L.) genotypes in solutions with sodium adsorption ratios (SARs) ranging from 0 to 60. Across all four genotypes, we observed a noteworthy decrease in seedling emergence and shoot dry matter (DM) as SAR levels increased. A strong positive correlation surfaced between the concentration of Ca in roots and both root and shoot DM for all genotypes. Notably, at SAR values exceeding 20, the more tolerant genotype (EGA Gregory) exhibited higher Ca concentrations in root tissues, while the comparatively sensitive genotype (Baxter) displayed signs of Na-induced Ca deficiency. Hence, prioritizing genotypes capable of accumulating Ca in roots under sodic conditions might serve as a valuable criterion for selecting genotypes adept at thriving in soils with high ESP values. However, in cases where plant growth is limited by ESP (SAR) values falling within the 6-10% range, it is probable that the constraints stem from physical factors rather than a Na-induced Ca deficiency.
Audience Take Away:
- We hypothesized that this data could pave the way for the creation of effective screening methods aimed at pinpointing tolerant genotypes
- These methods could significantly enhance crop establishment and early plant growth, particularly in instances of Na toxicity or Na-induced Ca deficiency prevalent in soils with high surface soil ESP
- Further investigation of this research could be pursued by students specializing in agricultural, soil science, or environmental studies.
