Detection of PDR5-mediated alachlor efflux using a chemically induced dimer biosensor.

Area of Science:

• Agricultural Science
• Molecular Biology
• Biochemistry

Background:

• Herbicide-resistant crops are crucial for sustainable agriculture.
• Transporter-mediated herbicide efflux is a key mechanism for herbicide resistance.
• Identifying specific transporters for herbicide efflux is challenging.

Purpose of the Study:

• To develop and utilize a synthetic molecular biosensor for identifying herbicide transporter activity.
• To screen for transporters involved in alachlor efflux using a yeast-based system.

Main Methods:

• Employed a synthetic yeast two-hybrid-based molecular biosensor engineered for alachlor responsiveness.
• Monitored cytosolic alachlor levels in yeast to evaluate candidate transporters.
• Validated transporter activity by assessing the effect of competing substrates.

Main Results:

• The biosensor system successfully identified the Saccharomyces cerevisiae transporter PDR5 as a mediator of alachlor efflux.
• PDR5's alachlor efflux activity was confirmed by the suppression of alachlor accumulation in the presence of a known competing substrate.
• The biosensor platform demonstrated a fluorescence output correlating with transporter activity and inhibition.

Conclusions:

• The developed yeast biosensor platform is effective for identifying transporter activity involved in herbicide efflux.
• This biosensor technology offers a valuable tool for future transporter-focused research in agricultural science.
• The findings advance strategies for developing herbicide-resistant crops.