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.
Highlights
Introduction iationsGrapes are one of the most important fruit crops on the planet
berry developmental stages (BDSs), and magnesium application forms are examined, the Magnesium deficiency (MD)-index demonstrates a significant influence of p < 0.05
Considering the different magnesium forms, it is obvious that the magnesium nanoparticles (Mg-NPs) treatment produced fewer symptoms of magnesium deficiency than the other magnesium forms
Summary
Introduction iationsGrapes are one of the most important fruit crops on the planet. Grape is a member of the Vitis genus, which is part of the Vitaceae family, which contains more than 60 genera.Grapes (Vitis vinifera L.) are cultivated in more than 100 countries throughout the world, with an estimated area of 7.8 million hectares in 2016. Grapes are one of the most important fruit crops on the planet. Grape is a member of the Vitis genus, which is part of the Vitaceae family, which contains more than 60 genera. Grapes (Vitis vinifera L.) are cultivated in more than 100 countries throughout the world, with an estimated area of 7.8 million hectares in 2016. Jam, juice, grape seed extract, dried grapes, vinegar, and grape seed oil are among the many goods made from grapes. In 2016, the world produced 75.8 million tons of grapes, with 39% produced in Europe, 34% produced in Asia, 18% produced in the Americas, and 9% produced in Africa [1]. Grapes are Egypt’s second most important fruit crop, after citrus. Egypt’s agriculture has succeeded in increasing vineyard area by 220,665 hectares over the past decade, yielding
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