Role of Zinc Oxide Nanoparticles in Ameliorating Salt Tolerance in Soybean

Abstract

A S LONG as we know, little attention has been given to evaluating roles of ZnO nanoparticles (ZnONPs) in plants grown under salinity stress. In the present study, biochemical and molecular responses of salt-stressed soybean cv. Giza111 under different ZnONPs were assessed. Treatment with a high NaCl concentration (250mM) alone caused a significant reduction (65%) in germination percentage as well as a significant decrease in all measured growth parameters (root length, shoot height, fresh and dry weight of roots and shoots) and photosynthetic performance (Fv/Fm) compared to control plants. In contrast, malondialdehyde (MDA) & proline contents, and activities of antioxidant enzymes (catalase CAT, peroxidase POX and superoxide dismutase SOD) were highly increased. In contrast, presoaking of soybean seeds with different concentrations of ZnONPs (25, 50, 100, 200mg/L) stimulated the growth of stressed plants which was exhibited by improved growth parameters and photosynthetic performance as well as lower levels of proline and MDA in stressed plants particularly at ZnONPs concentration of 50 mg/L compared to controls. Moreover, isozyme analysis of CAT, POX and SOD showed variable pattern of alleles at 50mg/L ZnONPs. Accordingly, these results recommend application of 50mg/L ZnONPs for improving the productivity of soybean cultivated in saline soils.

Effect of Seed Priming with ZnO Nanoparticles and Saline Irrigation Water in Yield and Nutrients Uptake by Wheat Plants

“…The decline was highest in the non-primed seeds compared with primed ones, thus the seed priming with ZnO NPs could improve the Zn uptake from 8 to 25% depending on the level of salinity imposed. These results agree with those obtained by Gaafar et al (2020) [13], they found that Zn +2 content in soybeans was significantly decreased under salinity stress by 76% compared to control, and presoaking of soybean seeds with ZnO NPs (50 mg L −1 ) increased Zn +2 content even under salinity stress 2.7-fold compared to salt treatment alone.…”

Plant salt response: Perception, signaling, and tolerance

“…A variety of nanomaterials (NMs) have been reported to enhance plant salt tolerance for growth under saline condition (Almutairi, 2016;Zulfiqar and Ashraf, 2021). For instance, some metal-based nanoparticles, cerium oxide nanoparticles, silica nanoparticles, titanium dioxide nanoparticles, and zinc oxide nanoparticles, can improve salt resistance in multiple plant species (Newkirk et al, 2018;Gaafar et al, 2020;Liu et al, 2021). NMs enhance plant salt tolerance mainly by improving plant photosynthesis performance, promoting ROS detoxification, and maintaining ionic homeostasis and resoring osmotic balance (Newkirk et al, 2018;Liu et al, 2021).…”

Comprehensive Selection Criteria for High-Yielding Bread Wheat (Triticum aestivum L.) Hybrids under Salinity Stress

“…Also, controlling the process of opening and closing of the stomata to prevent the depletion and consumption of a large amount of water during the photosynthesis process besides, preserve it for only vital processes such as germination, growth, leaf and fruiting formation, and high yield production under these critical physiological conditions. Further, the production and excretion of a large level of proline and glycine betaine contents under salt-stress conditions compared to the control experiment in the aforementioned promising wheat genotypes has added a physiological reason to bear not only to the salt stress but also for all environmental stresses that harm plants and destroy the final output (Abdel Sattar & El-Mouhamady, 2012;El-Mouhamady et al, 2016;Sahoo et al, 2018;Selem, 2019;Shaimaa et al, 2019;Yassin et al, 2019;Ebeed et al, 2019;Loutfy et al, 2019;Genc et al, 2019;El-Mouhamady et al, 2019;Abou Alhamd & Loutfy, 2020;Bacu et al, 2020;Al-Ashkar et al, 2020;Gaafar et al, 2020;El-Mouhamady & Ibrahim, 2020). Results shown in Table 5 are related to heterosis over better-parent asserted the fruitful role of dominance and dominance X dominance gene action.…”