Enhancing microspore embryogenesis initiation by reducing ROS, autophagy, and cell death with novel small molecules...

Area of Science:

• Plant Biotechnology
• Cell Biology
• Stress Physiology

Background:

• Microspore embryogenesis is a key tool for rapid double-haploid plant production in breeding.
• Cell death during stress-induced reprogramming significantly reduces the efficiency of microspore embryogenesis.
• Oxidative stress and autophagy are implicated in cell death during this process.

Purpose of the Study:

• To evaluate novel small molecule antioxidants for improving cell viability during microspore embryogenesis induction.
• To investigate the role of oxidative stress and autophagy in cell death during microspore reprogramming.
• To identify compounds that enhance microspore embryogenesis initiation.

Main Methods:

• Tested novel small molecule antioxidants in Brassica napus and Hordeum vulgare under heat and cold stress.
• Utilized transcriptomic and physiological analyses to assess oxidative stress and autophagy.
• Quantified changes in cell viability and microspore embryogenesis induction rates.

Main Results:

• Confirmed increased reactive oxygen species (ROS) production and upregulated oxidative stress and autophagy genes during embryogenesis induction.
• Identified specific novel antioxidants that effectively mitigate ROS accumulation and reduce cell death.
• Demonstrated enhanced cell viability and improved microspore embryogenesis initiation in treated microspores.

Conclusions:

• Novel small molecule antioxidants can significantly improve cell viability during microspore embryogenesis induction.
• These findings suggest a conserved cellular response to oxidative stress in microspore reprogramming across species.
• The identified antioxidants hold potential for optimizing in vitro plant breeding protocols by overcoming early-stage cell death challenges.