DGTT Enzyme Expression in Plant Vegetative Tissues
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Solution Overview
Problem
The challenge in using plant oils for biofuel production is the limited growing areas and finite supplies of fertilizers and resources for growing oil crop plants, which restricts the harvestable amount of plant oils per acre and increases the cost per liter of plant oil.
Innovation Solution
Expression of Diacylglycerol Acyltransferase Type Two (DGTT) enzymes from nucleic acid constructs in plant vegetative tissues increases acyl-CoA-dependent triacylglycerol synthesis, enhancing the lipid content and nutritional value of leaves and other tissues, thereby increasing the harvestable oil yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If plant oils are used for biofuel production, then renewable fuel supply is increased, but limited growing areas and finite fertilizer supplies restrict harvestable oil yield per acre
Solution Approach 1:
The invention applies local quality by directing DGTT enzyme expression specifically to vegetative tissues (leaves, stems) rather than throughout the entire plant or only in seeds. This localized enzyme expression concentrates triacylglycerol synthesis in photosynthetically active tissues, maximizing lipid accumulation in the portion of the plant that can be harvested for oil without affecting overall plant growth or requiring additional land
Solution Approach 2:
The invention changes the biochemical parameter of acyl carbon partitioning in plant tissues by introducing DGTT enzymes that alter the metabolic flux toward triacylglycerol synthesis. This parameter change increases the lipid content fraction in vegetative tissues from typical low levels to significantly higher concentrations, thereby increasing oil yield per unit area without expanding growing area
2Quantity of substance
If more land is allocated to oil crop production, then harvestable oil yield increases, but production costs increase due to finite fertilizer and resource supplies
Solution Approach 1:
The invention makes vegetative tissues, which traditionally serve only photosynthetic and structural functions, also serve as lipid production factories. By expressing DGTT enzymes in leaves and stems, these tissues acquire the additional function of triacylglycerol synthesis, allowing the same plant biomass to simultaneously perform photosynthesis, structural support, and oil production, thereby increasing total oil yield without proportionally increasing fertilizer and resource inputs
3Quantity of substance
If DGTT enzymes are expressed in plant vegetative tissues, then triacylglycerol synthesis and lipid content increase, but metabolic pathways and resource allocation are altered
Solution Approach 1:
The DGTT enzyme acts as a metabolic intermediary that channels acyl-CoA substrates into triacylglycerol synthesis pathways in vegetative tissues. By introducing this specific enzymatic mediator, the invention redirects metabolic flux without completely disrupting existing pathways, allowing controlled lipid accumulation while maintaining essential plant metabolic functions through the enzyme's specific catalytic activity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively increases the lipid content in plant tissues, improving the energy density and reducing production costs by enhancing oil yield per acre, making plant oils a more viable biofuel source.
Implementation Method 1
Expression of Diacylglycerol Acyltransferase Type Two (DGTT) enzymes from nucleic acid constructs can alter acyl carbon partitioning in plant vegetative tissues. Such expression can increase acyl-CoA-dependent triacylglycerol synthesis
Data Source
AI summary
As described herein, plants expressing algal Diacylglycerol Acyltransferase Type Two (DGTT) from heterologous nucleic acids can alter acyl carbon partitioning in plant vegetative tissues and increase acyl-CoA-dependent triacylglycerol synthesis, thereby increasing the lipid content of the plants' tissues.