Role of arbuscular mycorrhizal symbiosis in root mineral uptake under CaCO3 stress

Abstract

This study investigated the effects of increasing CaCO(3) concentrations (0, 5, 10, 20 mM) on arbuscular mycorrhizal (AM) symbiosis establishment as well as on chicory root growth and mineral nutrient uptake in a monoxenic system. Although CaCO(3) treatments significantly decreased root growth and altered the symbiosis-related development steps of the AM fungus Rhizophagus irregularis (germination, germination hypha elongation, root colonization rate, extraradical hyphal development, sporulation), the fungus was able to completely fulfill its life cycle. Even when root growth decreased more drastically in mycorrhizal roots than in non-mycorrhizal ones in the presence of high CaCO(3) levels, the AM symbiosis was found to be beneficial for root mineral uptake. Significant increases in P, N, Fe, Zn and Cu concentrations were recorded in the mycorrhizal roots. Whereas acid and alkaline phosphatase enzymatic activities remained constant in mycorrhizal roots, they were affected in non-mycorrhizal roots grown in the presence of CaCO(3) when compared with the control.

Barcoded NS31/AML2 primers for sequencing of arbuscular mycorrhizal communities in environmental samples

“…Based on studies elsewhere, however, it is possible that the dry season constrains the AMF community to taxa that are physically or physiologically tolerant of low soil moisture (e.g., Glomus and Diversispora ; Augé, 2001 ) or to high soil P fertility or pH ( Wang et al, 2016 ). Alternatively, these shifts may reflect differences in host plant requirements during the dry season for AMF that increase host drought tolerance (e.g., stomatal control, cytokinin production; Augé, 2001 ) or increase the acquisition of limiting nutrients from carbonate substrates (N, Fe, Zn; Labidi et al, 2012 ). Irrespective, our results indicate a high potential to use our AMF protocol in large-scale sequencing projects to address AMF diversity with sufficient taxonomic precision, to determine the extent to which AMF assemblages vary across host plants and ecosystems, and to resolve AMF species’ responses to edaphic stressors, such as anthropogenic N deposition, in complex environmental samples.…”

Effect of Tillage Practices and Cultivation Year on Natural Mycorrhization and Mineral Uptake of Durum Wheat during Tillering Stage under Rainfed Conditions

“…These results are in contrast with those showed by Garcia and Zimmermann [37] who concluded that plant K+ nutrition is clearly improved by mycorrhization. Moreover, Labidi et al [38] found that mycorrhization increased mineral nutrient uptake of chicory. Likewise, Ingraffia et al [39] compared nutrients uptake of wheat with and…”

Phytochemical variation among populations of Fouquieria splendens Engelm. (Fouquieriaceae)

“…An important factor that contributes to regional endemic diversity is the adaptation of plants to unusual soils, such as calcareous soils (Aguirre-Liguori et al 2014). It has been shown that in calcareous soils P deficiency is frequent, since the presence of calcium carbonate (CaCO 3 ) decreases the solubility of this element, affecting its availability and therefore the yield of plants; deficiencies of iron (Fe), manganese (Mn) and zinc (Zn) have also been observed in calcareous soils (Labidi et al 2012). Our results showed that the soils of S 1 , S 2 , and S 3 are nutrient-deficient.…”