Green Synthesized Titanium Oxide Nanoparticles Promote Salt Tolerance in Soybean.

Area of Science:

• Agricultural Science
• Nanotechnology
• Plant Physiology

Background:

• Soybeans are protein-rich but sensitive to environmental stressors like salt.
• Chemically synthesized titanium dioxide nanoparticles (TiO2 NPs) can enhance soybean growth under stress.
• Biological synthesis offers a sustainable approach to producing functional nanoparticles.

Purpose of the Study:

• To investigate the growth-promoting effects of biologically synthesized TiO2 NPs (GS-TiO2 NPs) on soybeans under salt stress.
• To elucidate the underlying molecular mechanisms of GS-TiO2 NP action in mitigating salt stress.
• To explore the potential of orange peel extract in synthesizing TiO2 NPs for agricultural applications.

Main Methods:

• Green synthesis of TiO2 NPs using orange peel extract.
• Treatment of soybeans with GS-TiO2 NPs under induced salt stress conditions.
• Analysis of root elongation, vacuolar H+-ATPase and glutathione reductase abundance via immunoblotting.
• Measurement of hydrogen peroxide production in soybean roots.

Main Results:

• GS-TiO2 NPs treatment restored salt-suppressed soybean root elongation to control levels.
• GS-TiO2 NPs recovered the abundance of vacuolar H+-ATPase and glutathione reductase in stressed soybean roots.
• GS-TiO2 NPs reduced elevated hydrogen peroxide levels in soybean roots under salt stress.

Conclusions:

• Biologically synthesized TiO2 NPs effectively mitigate salt stress in soybeans.
• GS-TiO2 NPs promote soybean growth by enhancing reactive oxygen species scavenging systems and restoring key protein levels.
• This study highlights the potential of green synthesized nanoparticles in sustainable agriculture for stress management.