Calcium Carbonate Reduces the Effectiveness of Soil-Added Monosilicic Acid in Cucumber Plants

Abstract

This study aimed to determine the capacity of monosilicic acid [Si(OH) 4 ] to mitigate nutritional and metabolic disorders in plants induced by high levels of soil calcium carbonate (CaCO 3), which raises soil pH and lowers solubility of soil micronutrients. Plants (Cucumis sativus L.) were grown in a soil with increasing rates of Si(OH) 4 at two CaCO 3 doses. Biometrical parameters, leaf chlorophyll and leaf and stem nutrients as well as leaf metabolic responses, using a metabolomics approach, were evaluated. Additionally, extractable Si and Si plant availability were examined. Manifestations of Si-induced effects in cucumber were highly CaCO 3-dependent. In the-CaCO 3 plants, Si(OH) 4 addition induced distinct plant-beneficial effects, such as enhanced transport of iron (Fe) and manganese (Mn) to stems and/or leaves, accompanied with enhanced leaf abundance of metabolites (αtocopherol, galactinol, threonic and ferulic acids) potentially involved in plant defence mechanisms against diverse environmental stresses. Biostimulant activity of Si(OH) 4 was not evident in plants grown in the CaCO 3-treated soil, characterized by reduced extractability and bioavailability of Si, compared with the untreated soils. The low physiological effectiveness of Si(OH) 4 on the CaCO 3-treated soil is likely due to a significant decrease in plant availability of Si, against a background of drastic plant performance impairment at high pH values induced by CaCO 3 excess.

Biostimulant Substances for Sustainable Agriculture: Origin, Operating Mechanisms and Effects on Cucurbits, Leafy Greens, and Nightshade Vegetables Species

“…In a 2018 greenhouse cucumber study [129] on silicon treatments, either via the soil incorporation of affordable wollastonite or via irrigation with soluble potassium silicate, did not result in significant increases in either growth or yield. Silicon treatments also do not seem to improve cucumber nutritional status in leaf tissues as no significant differences were noted between the micronutrient and macronutrient contents of treated and untreated plants [130].…”

Effect of chemical fertilizer and humic acid on cabbage leaves' N, P, K and S concentrations (Brassica oleracea var. capitata L.)

“…It is evident from tables (3,4,6,7,8,9) that there were significant differences between the treatments of the compound chemical fertilizer NPK. The reason may be due to the role of fertilizer and increasing the leaves' concentrations of nutrients N, P, and K. This increases the activity of Table 6.…”

“…What distinguishes it from other vegetables is that it contains glucosinolate compounds, which are sulfur-rich compounds that protect against cancer 2 . Nitrogen, phosphorous and potassium are essential elements for the plant of cabbage, as this nutrient faces many challenges in the soils of dry and semi-arid regions of the world, including Iraqi soils due to high temperatures and low rainfall, which causes a decrease in its content of organic material and a high degree of interaction Soil resulting from the presence of calcium carbonate, which causes a decrease in soil fertility as a result of exposure of the added elements to the soil to the processes of loss and stabilization 3 . Nitrogen is an important and crucial element in plant growth and development.…”

First report of coriander leaf blight diseases caused by Cladosporium tenuissimum in China and analysis of metabolic alterations related to pathogenic processes

“…Rose et al (2012) showed that the Zn‐efficient rice line RIL46 significantly reduced its myo ‐inositol levels when under Zn deficiency and bicarbonate stress, compared with the Zn‐inefficient cultivar IR74. Bityutskii et al (2019) found that the l ‐threonic acid and myo ‐inositol levels of cucumber were significantly down‐regulated when cucumber performance was drastically impaired at high pH values induced by CaCO 3 excess. Myo ‐inositol can regulate the programmed cell death of plants, thereby limiting the spread of pathogens (Meng et al, 2009; Sambe et al, 2015).…”