A Comparison of the Effects of Several Foliar Forms of Magnesium Fertilization on ‘Superior Seedless’ (Vitis vinifera L.) in Saline Soils

Abstract

Magnesium (Mg) is the most essential element constituent in chlorophyll molecules that regulates photosynthesis processes. The physiological response of ‘Superior Seedless’ grapes was evaluated under different foliar magnesium fertilization such as sulfate magnesium (MgSO4·7 H2O), magnesium disodium EDTA (Mg-EDTA), and magnesium nanoparticles (Mg-NPs) during the berry development stages (flowering, fruit set, veraison, and harvest). In general, the ‘Superior Seedless’ vine had a higher performance in photosynthesis with Mg-NPs application than other forms. The Fy/Fm ratio declined rapidly after the fruit set stage; then, it decreased gradually up until the harvesting stage. However, both MgSO4 and Mg-EDTA forms showed slight differences in Fv/Fm ratio during the berry development stages. The outcomes of this research suggest that the Fv/Fm ratio during the growth season of the ‘Superior Seedless’ vine may be a good tool to assess magnesium fertilization effects before visible deficiency symptoms appear. Mg-NPs are more effective at improving ‘Superior Seedless’ berry development than the other magnesium forms. These findings suggest that applying foliar Mg-NPs to vines grown on salinity-sandy soil alleviates the potential Mg deficiency in ‘Superior Seedless’ vines and improves bunches quality.

Effect of foliar spraying with Seaweed Extract (Chlorella vulgaris) and Nano fertilizers on growth, yield and fruit quality of Flame Seedless grapevines

“…Additionally, the statistical analysis declared significant differences for cluster weight (g.) due to the interaction between the check treatments, the maximum values in cluster weight (394.0, 461.2 and 428.8 g.) were recorded by Dormex × C. vulgaris + Nano (Fe + Zn) in 2020, 2021 and 2022 seasons, respectively. These data are in harmony with those reported by Hussain et al, (2021) andAbo El-Ezz et al, (2022).…”

Insights into Key Biometric, Physiological and Biochemical Markers of Magnesium (Mg) Deficiency Stress in the Halophyte Cakile maritima

“…Likewise, Farhat et al studied the effect of Mg deficiency on the halophyte S. carnosa and found a significant decrease in the photosynthetic performance, especially when plants were subjected to severe Mg shortage [20,44]. Such findings could be explained by the fact that a high fraction of Mg is found in chloroplasts where it ensures an optimal functioning of photosynthesis [21] and that Mg is an important component of the photosynthetic machinery as a cofactor involved in the biosynthesis of various enzymes, including those involved in respiration and photosynthesis [45] and consequently its deficiency underpins the photosynthetic performance of most crop species [20][21][22]. As shown recently by Pang et al and Jamali et al, Mg shortage adversely impacted the ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), the main enzyme involved in CO 2 fixation resulting in a decrease in photosynthetic performance [46,47].…”

“…Mg is the most essential element constituent in chlorophyll molecules, and its metabolism regulates the photosynthetic process [45]. The reduction in chlorophyll concentration was generally followed by a significant decline in photosynthesis because chlorophyll metabolism is connected with photosynthesis [53].…”

The Effect of Combining Post-Harvest Calcium Nanoparticles with a Salicylic Acid Treatment on Cucumber Tissue Breakdown via Enzyme Activity during Shelf Life

“…This could also be due to the increased inhibition of cell wall degradation enzymes, such as PG, CEL, and XYL, all of which are linked to fruit firmness [29]. Because of the presence of salicylic acid, the water content of the cucumber fruit tissue was preserved during the shelf life by inhibiting CWEAs [5,27,30,31].…”