PJB-2022-1
Positive and Negative impact of ZnO Nanoparticles on Wheat Plant Growth under Drought Stress.
Gehan H. Abd El-Aziz
Abstract
Drought stress is one of the most serious abiotic stresses that restrict plant growth. This study was carried out to evaluate the positive and negative impact of ZnO nanoparticles on wheat plant growth under drought stress. A green synthesis technique was used to produce pollutant-free nano structures. A Field experiment was carried out during two successive seasons (2019-2020). NP-Zn-O was applied either by seed-soaking, foliar spraying, or both together applications. The dose of ZnO NPs was 100 mg/l. Data showed that drought stress reduced the grain and shoot wheat yield. The use of the different forms of ZnO improved the grain and shoot wheat yield, these increases reached 1.16-, 1.54-fold that control. Also, one of the other effects of Zn-O NPs is an increase in the levels of chlorophyll, proline antioxidants in plant tissues as it works as a cofactor of enzymes like such as superoxide dismutase, catalase. Data observed that the role played by ZnO-NPs is not only to improve plant growth and physiological parameters but also to enhance nutrient uptake and plant nutrient content. In this regard, using zinc in the form of ZnO-NPs had a positive effect to reduce the adverse effects of drought conditions and improve the quality of plant nutrition.
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