High-Level Patchoulol Biosynthesis in Artemisia annua L

Area of Science:

• Plant biotechnology
• Metabolic engineering
• Synthetic biology

Background:

• Terpenes are vital plant compounds with broad industrial applications.
• Low natural yields and high synthesis costs limit terpene availability.
• Plants offer an efficient, photosynthesis-driven production pathway.

Purpose of the Study:

• To engineer Artemisia annua for heterologous sesquiterpenoid patchoulol production.
• To enhance patchoulol yield through genetic modification and subcellular localization.

Main Methods:

• Overexpression of avian farnesyl diphosphate synthase and patchoulol synthase genes using the 35S promoter.
• Utilized signal peptides to alter sesquiterpene synthase subcellular localization.
• Quantified patchoulol content in transgenic Artemisia annua.

Main Results:

• Transgenic plants achieved patchoulol content of 52.58 μg/g DW with gene overexpression.
• Altering subcellular localization increased patchoulol accumulation to 273 μg/g DW.
• Demonstrated successful heterologous production of patchoulol in Artemisia annua.

Conclusions:

• Artemisia annua serves as an effective platform for synthetic biology and terpene production.
• Genetic engineering and subcellular targeting are key strategies for enhancing terpene yields.
• This approach offers a cost-effective alternative to chemical or microbial synthesis.