Bryophytes as metabolic engineering platforms

Area of Science:

• Plant Biotechnology
• Metabolic Engineering
• Bryophyte Biology

Background:

• Metabolic engineering in plants offers advantages over microbial systems, including cost-effectiveness and carbon autotrophy.
• Bryophytes, particularly liverworts (Marchantia polymorpha) and mosses (Physcomitrium patens), are emerging as powerful systems for plant metabolic engineering.
• These organisms possess rapid transformation capabilities and a haploid-dominant lifecycle, supported by an expanding genetic toolkit.

Purpose of the Study:

• To review the current understanding of bryophyte metabolism, highlighting its divergence from seed plants.
• To identify key metabolic pathways and features that make bryophytes suitable for metabolic engineering.
• To emphasize the need for quantitative metabolic knowledge to enhance specific biosynthetic capabilities.

Main Methods:

• Literature review of current research on bryophyte metabolism and metabolic engineering.
• Comparative analysis of metabolic pathways between bryophytes and seed plants.
• Identification of distinct bryophyte metabolic characteristics, such as high yields of terpenoids and very long-chain polyunsaturated fatty acids (vlcPFAs).

Main Results:

• Bryophyte metabolism shares conserved pathways with seed plants but exhibits unique features.
• Distinct bryophyte metabolic characteristics include high diversity and quantities of terpenoids and vlcPFAs.
• The genetic resources for Marchantia polymorpha and Physcomitrium patens facilitate efficient pathway engineering.

Conclusions:

• Bryophytes are promising platforms for plant metabolic engineering, leveraging their unique metabolic profiles.
• Advancing bryophyte metabolic engineering requires a deeper quantitative understanding of central metabolism.
• Focusing on pathways for terpenoid and vlcPFA biosynthesis is crucial for maximizing the potential of these model organisms.