Transient Agrobacterium Infiltration for Plant Drought Tolerance
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Solution Overview
Problem
Current methods for increasing plant drought stress tolerance through transgenic approaches are time-consuming, ecologically problematic due to the spread of antibiotic and herbicide resistance genes, and not permissible in all countries, necessitating a more environmentally safe and efficient solution.
Innovation Solution
A process involving transient expression of specific nucleic acid constructs in plants using Agrobacterium strains, which provides drought stress resistance without incorporating selectable marker genes, allowing for targeted abiotic stress protection under conditions of drought, and enabling plants to be used for animal feed or biofuel production when stress is not present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transgenic plants are used to provide abiotic stress tolerance, then stress resistance is improved, but the process becomes time-consuming and ecologically problematic
Solution Approach 1:
The patent transitions from static transgenic modification to dynamic transient expression. The nucleic acid construct is delivered via Agrobacterium-mediated infiltration, enabling temporary expression of stress tolerance genes (such as CspB from Bacillus subtilis) only when needed, rather than permanent transgenic modification. This allows rapid response to environmental conditions without multi-year breeding programs.
Solution Approach 2:
The patent changes the temporal parameter of gene expression from permanent (transgenic) to temporary (transient). By using nucleic acid constructs that are expressed transiently in plant tissues, the system achieves stress tolerance during critical periods without requiring stable integration into the genome, thereby reducing development time and avoiding regulatory restrictions on transgenic crops.
2Reliability
If transgenic plants with selectable marker genes are used, then stress resistance is improved, but environmental safety deteriorates due to spread of antibiotic and herbicide resistance genes
Solution Approach 1:
The patent extracts and eliminates the harmful selectable marker genes from the transformation system. Instead of using transgenic plants with antibiotic or herbicide resistance markers, the invention employs transient expression of functional nucleic acid constructs (such as those encoding cold shock proteins) without requiring selection markers, thereby preventing environmental contamination while maintaining stress tolerance benefits.
Solution Approach 2:
The patent uses transient nucleic acid constructs that function temporarily and then degrade naturally, rather than permanent transgenic modifications. These disposable genetic elements provide stress tolerance during the expression period without integrating into the genome, eliminating the long-term environmental risks associated with selectable marker genes while maintaining the desired phenotypic effect.
3Reliability
If transgenic crop plants are planted, then stress resistance is improved, but adaptability deteriorates due to regulatory restrictions in certain countries
Solution Approach 1:
The patent employs dynamic transient expression systems that can be applied across different geographical regions without being constrained by transgenic regulations. By using Agrobacterium-mediated delivery of nucleic acid constructs that express stress tolerance genes temporarily, the technology becomes adaptable to countries with varying biotech regulations, including those that prohibit transgenic crop planting.
4Reliability
If conventional transgenic methods are used, then stress resistance is improved, but device complexity increases due to multiple transformation steps
Solution Approach 1:
The patent merges the delivery vector (Agrobacterium) with the functional nucleic acid construct in a single system. Rather than requiring separate steps for vector construction, plant transformation, and marker selection, the invention combines these elements into an integrated transient expression system where the Agrobacterium directly delivers the stress tolerance genes without requiring complex selection procedures.
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 method effectively enhances drought stress resistance in plants without the environmental risks associated with transgenic markers, offering a flexible and safe approach for crop management that reduces crop loss and allows for differentiated use of crops based on stress conditions.
Implementation Method 1
providing aerial parts of said plants with a suspension containing cells of an Agrobacterium strain comprising a nucleic acid molecule comprising a nucleic acid construct containing a nucleotide sequence of interest, said nucleotide sequence of interest providing said plants with increased drought stress resistance upon expression in said plants, wherein said plants are transiently transfected with said nucleic acid molecule
Data Source
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AI summary
Crop growth management system comprising a process of providing a plant with improved abiotic stress tolerance, comprising providing aerial parts of said plant with a suspension containing cells of an Agrobacterium strain comprising a nucleic acid molecule comprising a nucleic acid construct containing a nucleotide sequence of interest, said nucleotide sequence of interest providing said plant with increased abiotic stress tolerance upon expression in said plant.