Knocking Down miR172f in the Hairy Roots of Grass Pea Increases β-ODAP Content and Induces Global Transcriptomic...

Area of Science:

• Plant biochemistry
• Molecular biology
• Neuroscience

Background:

• The neurotoxin beta-N-oxalyl-L-alpha,beta-diaminopropionic acid (β-ODAP) is abundant in Lathyrus sativus (grass pea).
• β-ODAP has dose-dependent toxicological and pharmacological effects, influencing its utilization, safety, and purification.
• LsBAHD3 acyltransferase is identified as the key enzyme in β-ODAP biosynthesis.

Purpose of the Study:

• To investigate the regulatory role of miR172f in β-ODAP biosynthesis.
• To elucidate the interaction between miR172f and the β-ODAP synthetase LsBAHD3.
• To understand the genetic network governing β-ODAP production in Lathyrus sativus.

Main Methods:

• Bioinformatic analysis and transient co-expression assays in Nicotiana benthamiana.
• Knockdown of miR172f in Lathyrus sativus hairy roots.
• Transcriptomic analysis to identify regulatory pathways.

Main Results:

• Knockdown of miR172f in L. sativus hairy roots led to increased β-ODAP content.
• miR172f targets LsBAHD3, suggesting a regulatory mechanism.
• Associated pathways include protein ubiquitination and amino acid metabolism.

Conclusions:

• miR172f is a novel regulator of β-ODAP biosynthesis by targeting LsBAHD3.
• This finding provides insight into the gene expression of β-ODAP synthetase.
• Identifies a key component of the genetic network controlling β-ODAP biosynthesis in L. sativus.