Plant Trichome Density Control for Specialized Metabolite Transport
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Solution Overview
Problem
There is a need for a better understanding of the genes, regulatory factors, and signaling mechanisms involved in the control of trichome initiation and development in plants, particularly to increase the density of glandular trichomes to enhance the production and transport of specialized metabolites such as terpenoids.
Innovation Solution
The use of recombinant nucleic acid molecules encoding amino acid sequences similar to SEQ ID NOs: 18-22 and 31-33, operably linked to heterologous promoters, to modify trichome density and improve the transport of specialized metabolites in plants, specifically in tobacco and cannabis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If transcriptional regulation of trichome initiation is enhanced through overexpression of MYB and C2H2 zinc-finger family transcription factors, then trichome density increases, but the complexity of genetic regulation increases
Solution Approach 1:
The patent utilizes transcription factors from established families (MYB and C2H2 zinc-finger) that perform multiple functions in plant development, allowing them to regulate trichome initiation while potentially influencing other developmental processes. This multi-functionality approach increases trichome density without requiring entirely new regulatory mechanisms, thereby managing genetic complexity.
Solution Approach 2:
The invention changes the expression levels (parameters) of existing transcription factor genes through transgenic overexpression strategies. By adjusting the quantity and activity of these regulatory proteins, the patent achieves increased trichome density without fundamentally altering the genetic regulatory network architecture, thus avoiding excessive complexity.
2Productivity
If Lipid transfer proteins (LTPs) are overexpressed to increase transport of specialized metabolites, then exudate production increases, but protein expression complexity increases
Solution Approach 1:
Lipid transfer proteins serve as intermediary molecules that facilitate the transport of hydrophobic specialized metabolites through the aqueous cellular environment and into the cuticle. By overexpressing these intermediary LTP proteins, the patent enhances metabolite transport efficiency and exudate production without requiring direct modification of the metabolite biosynthesis pathways, thereby managing protein expression complexity.
Solution Approach 2:
The patent employs transgenic overexpression to create additional copies of LTP genes, increasing the quantity of transport proteins available. This copying strategy amplifies the transport capacity for specialized metabolites, directly increasing exudate production while utilizing existing, well-characterized LTP protein sequences that are already optimized for their function.
Data Source
AI summary
The present disclosure relates to compositions and methods related to modification of trichome density and transport of metabolite and their uses in plants, including tobacco and cannabis. The provided transcription factors enable the increase in trichome density in plants.