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Plant Sciences

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Utah State University

Student Research Symposium

Drought tolerance

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Is Mitigation Of Drought Stress By Zinc Oxide Nanoparticles Driven By A Nano-Specific Mechanism Or Mitigation Of Micronutrient Deficiency?, Justin Deakin Apr 2021

Is Mitigation Of Drought Stress By Zinc Oxide Nanoparticles Driven By A Nano-Specific Mechanism Or Mitigation Of Micronutrient Deficiency?, Justin Deakin

Student Research Symposium

It has been reported that zinc oxide (ZnO) nanoparticles (NPs) can promote drought tolerance in crops when used as soil amendments. However, many of these experiments were conducted in Zn-deficient growth media with no comparison to currently available Zn fertilization methods, making it unclear if the benefits from adding ZnO NPs were caused by a nano-specifc mechanism or simply by the mitigation of a micronutrient deficiency. A review of the literature shows that of 12 published experiments considering the effects of ZnO NPs on plant health, 5 out of 6 studies that did not include a comparison to currently available …


Mechanisms Of Water-Wise Ornamental Plant To Tolerate Water Stress, Ji-Jhong Chen Apr 2021

Mechanisms Of Water-Wise Ornamental Plant To Tolerate Water Stress, Ji-Jhong Chen

Student Research Symposium

Water-wise plants are essential for appealing landscapes in water-scare regions. Buffaloberry (Shepherdia ×utahensis ‘Torrey’) is an ornamental plant developed for water-wise landscaping. This plant shows outstanding performance with minimum water requirements. However, no research has been conducted to investigate its drought tolerance mechanisms. Plants were grown using an automated irrigation system, and the substrate water contents (SWCs) were controlled at 0.05 to 0.40 m3/m3 using soil moisture sensors for 50 days. The results showed that total irrigation volume, substrate permittivity (soil moisture level), and plant transpiration rate decreased, while plant turgor pressure increased with decreasing SWCs. Also, plant growth of …