Improving Soybean Germination and Nodule Development with Nitric Oxide-Releasing Polymeric Nanoparticles

Area of Science:

• Plant Biology
• Biotechnology
• Agricultural Science

Background:

• Nitric oxide (NO) is a vital signaling molecule in plants, regulating germination and symbiosis.
• The instability of NO necessitates advanced delivery systems like nanoencapsulation for sustained effects.

Purpose of the Study:

• To assess the efficacy of nanoencapsulated S-nitrosoglutathione (GSNO) in polymeric nanoparticles for soybean (Glycine max) seed treatment.
• To evaluate the impact on germination, nodulation, and plant growth parameters.

Main Methods:

• Soybean seeds were treated with free GSNO, chitosan nanoparticles (NP CS-GSNO/NP CS-GSH), and alginate nanoparticles (NP Al-GSNO/NP Al-GSH).
• Nanoparticle characteristics (size, zeta potential, NO release) and plant physiological responses were analyzed.

Main Results:

• Chitosan nanoparticles were smaller and released NO faster than alginate nanoparticles.
• NP CS-GSNO significantly enhanced germination, root length, secondary root number, and dry root mass.
• NP Al-GSNO increased shoot dry mass and secondary root number; NP CS-GSNO uniquely boosted nodule dry mass.
• All tested nanoparticles increased root S-nitrosothiol levels.

Conclusions:

• Chitosan nanoparticles show significant potential for improving NO donor delivery in soybean seeds.
• Nanoencapsulation offers a promising strategy to enhance NO's role in plant development and nodulation.