Omics-based Elucidation of Sesquiterpene Biosynthesis in Tanacetum parthenium under Organic

* *Omics-based Elucidation of Sesquiterpene Biosynthesis in Tanacetum parthenium under Organic Farming Conditions**

* *Abstract**

Tanacetum parthenium, a medicinal crop species, is increasingly being cultivated under organic farming conditions to produce sesquiterpenes, a class of secondary metabolites with diverse applications in medicine and agriculture. However, the complex interplay between agronomic factors, plant defense responses, and secondary metabolite profiles in organically grown Tanacetum parthenium remains poorly understood. This study integrates advanced omics technologies to elucidate the synergistic effects of fungal endophytes and high-intensity light on the biosynthesis of sesquiterpenes in Tanacetum parthenium under organic farming conditions.

* *Key Findings**

1. Fungal endophytes, particularly those belonging to the genus Aspergillus, significantly enhanced the biosynthesis of sesquiterpenes in Tanacetum parthenium under organic farming conditions.

2. High-intensity light exposure, particularly in the blue and red spectral ranges, also stimulated the biosynthesis of sesquiterpenes in Tanacetum parthenium.

3. The synergistic effects of fungal endophytes and high-intensity light on sesquiterpene biosynthesis were mediated by regulatory cross-talk between fungal endophyte-encoded sesquiterpene synthases and host plant-encoded transcription factors.

4. Prolonged exposure to high-intensity light and limited water availability also influenced the expression of genes involved in sesquiterpene biosynthesis in Tanacetum parthenium.

* *Botanical Mechanisms**

The biosynthesis of sesquiterpenes in Tanacetum parthenium involves a complex network of enzymes, including sesquiterpene synthases, which catalyze the conversion of farnesyl diphosphate (FPP) into sesquiterpenes. Fungal endophytes, particularly those belonging to the genus Aspergillus, possess sesquiterpene synthases that can interact with host plant-encoded transcription factors to regulate the expression of genes involved in sesquiterpene biosynthesis.

* *Methods/Diagnostics**

This study employed a combination of omics technologies, including transcriptomics, metabolomics, and proteomics, to elucidate the complex interplay between agronomic factors, plant defense responses, and secondary metabolite profiles in organically grown Tanacetum parthenium. The expression of genes involved in sesquiterpene biosynthesis was analyzed using quantitative reverse transcription polymerase chain reaction (qRT-PCR), while the content of sesquiterpenes was determined using gas chromatography-mass spectrometry (GC-MS).

* *Interpretation**

The findings of this study suggest that fungal endophytes and high-intensity light can significantly enhance the biosynthesis of sesquiterpenes in Tanacetum parthenium under organic farming conditions. The synergistic effects of fungal endophytes and high-intensity light on sesquiterpene biosynthesis were mediated by regulatory cross-talk between fungal endophyte-encoded sesquiterpene synthases and host plant-encoded transcription factors.

* *Diagnostic Thresholds/Assay Caveats**

The analysis of sesquiterpene content using GC-MS requires careful consideration of the following diagnostic thresholds:

* The minimum detectable limit (MDL) of sesquiterpene content should be < 1 ng/g.

* The coefficient of variation (CV) of sesquiterpene content should be < 10%.

* The accuracy of sesquiterpene content should be > 90%.

* *Practical Implications**

The findings of this study have significant practical implications for the cultivation of Tanacetum parthenium under organic farming conditions. Fungal endophytes and high-intensity light can be used as biotechnological tools to enhance the biosynthesis of sesquiterpenes in Tanacetum parthenium, which can be used as a natural pest control agent or as a pharmaceutical ingredient.

* *Limitations**

This study has several limitations, including:

* The analysis of sesquiterpene content using GC-MS is a time-consuming and labor-intensive process.

* The effect of fungal endophytes and high-intensity light on sesquiterpene biosynthesis may vary depending on the specific cultivar of Tanacetum parthenium.

* The synergistic effects of fungal endophytes and high-intensity light on sesquiterpene biosynthesis may be influenced by other environmental factors, such as temperature and humidity.

* *Technical FAQ**

1. Q: What is the minimum detectable limit (MDL) of sesquiterpene content using GC-MS?

A: The MDL of sesquiterpene content using GC-MS is < 1 ng/g.

2. Q: What is the coefficient of variation (CV) of sesquiterpene content using GC-MS?

A: The CV of sesquiterpene content using GC-MS is < 10%.

3. Q: What is the accuracy of sesquiterpene content using GC-MS?

A: The accuracy of sesquiterpene content using GC-MS is > 90%.

4. Q: How can fungal endophytes and high-intensity light be used to enhance the biosynthesis of sesquiterpenes in Tanacetum parthenium?

A: Fungal endophytes and high-intensity light can be used as biotechnological tools to enhance the biosynthesis of sesquiterpenes in Tanacetum parthenium.