C4 Transporter Expression for Crop Yield
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Solution Overview
Problem
Conventional methods for improving crop yield, such as selective breeding, are labor-intensive and often result in heterogeneous genetic components, while traditional genetic engineering techniques may not effectively enhance key traits like seed yield and biomass production.
Innovation Solution
Expression of C4 transporter coding sequences in plants to enhance photosynthetic carbon assimilation by improving the transport of metabolites across cell and organelle membranes, using methods like transformation and breeding, and identifying genes under positive selection in C4 plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If selective breeding techniques are used to improve crop yield, then desirable traits can be identified and transferred, but the process becomes labor intensive and results in heterogeneous genetic components that may not reliably pass on the desired trait
Solution Approach 1:
The patent replaces mechanical selective breeding methods with genetic engineering technology. Specifically, it uses molecular biology techniques to isolate, manipulate, and introduce specific genetic material (DNA or RNA) into plants, thereby substituting the labor-intensive mechanical process of selective breeding with a more precise and efficient molecular-level intervention approach
Solution Approach 2:
The patent introduces genetic material (DNA or RNA) as an intermediary carrier to transfer desirable traits. This intermediary mechanism allows for the precise delivery of specific genetic information into the plant genome, enabling reliable trait inheritance without the heterogeneity problems associated with conventional breeding
2Adaptability or versatility
If conventional genetic engineering techniques are used to modify plant germplasm, then specific genetic material can be introduced, but the effectiveness in enhancing key traits like seed yield and biomass production is limited
Solution Approach 1:
The patent changes the parameters of genetic engineering by focusing on specific metabolite transporter genes (such as DCT1, DCT2, DCT4, MEP3, NHD, PPT1, PPT2, TPT) rather than general genetic modification. It also changes the approach by targeting specific metabolic pathways (C4 photosynthesis, starch synthesis, oil synthesis, protein synthesis) to enhance productivity, thereby adjusting the parameters of gene selection and functional focus to achieve better trait enhancement and productivity outcomes
3Productivity
If photosynthetic carbon assimilation is increased to improve plant growth, then more efficient metabolite transport is needed, but traditional methods do not effectively enhance the transport of photosynthetic metabolites across cell and organelle membranes
Solution Approach 1:
The patent introduces specific metabolite transporter proteins as intermediary carriers to facilitate the transport of photosynthetic metabolites across cell and organelle membranes. These transporter proteins act as mediators that enable efficient carbon assimilation by transporting metabolites such as sugars, amino acids, and other photosynthetic products between cells and organelles, thereby solving the transport bottleneck without requiring complex structural modifications
Solution Approach 2:
The patent changes the parameter of membrane transport by introducing and overexpressing specific transporter genes (DCT1, DCT2, DCT4, MEP3, NHD, PPT1, PPT2, TPT) that are optimized for transporting photosynthetic metabolites. This genetic parameter change enhances the transport capacity and efficiency of metabolites across membranes, directly supporting increased photosynthetic carbon assimilation
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
Increases plant growth and yield by relieving feedback inhibition in photosynthetic processes, leading to improved carbon assimilation and higher crop productivity.
Implementation Method 1
enhance photosynthetic carbon assimilation by improving the transport of metabolites across cell and organelle membranes
Data Source
AI summary
Compositions and methods for increasing plant growth for higher crop yield are provided. The methods involve the expression in a plant of interest of at least one C4 transporter coding sequence. Plants showing increased expression of one or more C4 transporter coding sequence of interest are encompassed by the invention. It is recognized that any method for increasing the expression of the C4 transporter coding sequences in a plant of interest can be used in the practice of the methods disclosed herein. Such methods include transformation, breeding and the like. Increased expression of the C4 transporter coding sequences in the plant of interest results in yield gains. Expression cassettes and vectors comprising the C4 transporter sequences disclosed herein are also provided herein. Methods for identifying genes under positive selection in plants that use C4 photosynthesis are disclosed and provided herein.