Anzooman, M.; Christopher, J.; Dang, Y.P.; Menzies, N.W.; Kopittke, P.M. Genotypic Variability in Wheat Response to Sodicity: Evaluating Growth and Ion Accumulation in the Root and Shoot. Agronomy2023, 13, 3035.
Anzooman, M.; Christopher, J.; Dang, Y.P.; Menzies, N.W.; Kopittke, P.M. Genotypic Variability in Wheat Response to Sodicity: Evaluating Growth and Ion Accumulation in the Root and Shoot. Agronomy 2023, 13, 3035.
Anzooman, M.; Christopher, J.; Dang, Y.P.; Menzies, N.W.; Kopittke, P.M. Genotypic Variability in Wheat Response to Sodicity: Evaluating Growth and Ion Accumulation in the Root and Shoot. Agronomy2023, 13, 3035.
Anzooman, M.; Christopher, J.; Dang, Y.P.; Menzies, N.W.; Kopittke, P.M. Genotypic Variability in Wheat Response to Sodicity: Evaluating Growth and Ion Accumulation in the Root and Shoot. Agronomy 2023, 13, 3035.
Abstract
Soil sodicity is a major constraint to seedling emergence and crop production, potentially reducing plant growth due to physical and chemical constraints. Examining responses to ion imbalances may assist in the identification of genotypes tolerant to chemical constraints in sodic soils and improve productivity. We evaluated the performance of four wheat (Triticum aestivum. L) genotypes in solutions with five sodium adsorption ratios (SARs) ranging from 0 to 60. For all four genotypes, seedling emergence and shoot dry matter (DM) decreased significantly with increasing SAR. A significant positive correlation was observed between Ca concentration in roots, as well as both root and shoot DM for all genotypes. At SAR values >20, a more tolerant genotype (EGA Gregory), had higher Ca concentrations in root tissues, while a more sensitive genotype (Baxter) exhibited Na-induced Ca deficiency. Thus, selection for genotypes that are able to accumulate Ca in roots in sodic conditions may be a useful trait for selecting genotypes tolerant of soils with high ESP values. However, for soils that restrict plant growth at ESP (SAR) values of 6-10%, it is likely that growth is restricted by physical constraints rather than by a Na-induced Ca deficiency.
Keywords
biomass; Ca concentration; seedling; emergence; roots; youngest mature leaf
Subject
Biology and Life Sciences, Agricultural Science and Agronomy
Copyright:
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