OsLEC1 Gene Knockout for Faster Rice Callus Differentiation
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Solution Overview
Problem
Existing methods for improving rice callus differentiation are time-consuming, require specific instruments, and can cause heavy metal pollution, and are not universally effective across different plant varieties.
Innovation Solution
An application method based on the OsLEC1 gene using CRISPR-Cas9 technology to knockout OsLEC1, involving gRNA target site selection, cloning, ligation, PCR amplification, enzyme digestion, vector transformation, and Agrobacterium-mediated genetic transformation of rice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods (drying treatment, radiation treatment, adding elements) are used to improve rice callus differentiation rate, then differentiation rate can be improved, but the process becomes time-consuming, requires specific instruments, causes heavy metal pollution, and lacks universal effectiveness
Solution Approach 1:
The invention changes the fundamental parameter from external physical/chemical treatments to internal genetic regulation by knocking out the OsLEC1 gene. This genetic modification approach eliminates the need for complex external treatments (drying, radiation, chemical additives) while achieving reliable callus differentiation, thereby resolving the contradiction between differentiation rate and process complexity
Solution Approach 2:
The invention extracts and removes the OsLEC1 gene function through CRISPR-Cas9 mediated knockout. By taking out the specific gene responsible for inhibiting callus differentiation, the method achieves differentiation improvement without introducing complex external treatments or heavy metal elements, thus simplifying the overall process while maintaining reliability
2Reliability
If multiple innovative methods are adopted to improve differentiation rate, then differentiation rate can be improved, but the methods become numerous and messy, and are not universally suitable for rice
Solution Approach 1:
The OsLEC1 gene knockout method provides a universal solution applicable to various rice varieties. By targeting a conserved gene function rather than using variety-specific external treatments, the invention achieves both high differentiation rates and broad adaptability across different rice cultivars, resolving the contradiction between reliability and universality
3Reliability
If elements including copper and silver are added to improve differentiation rate, then differentiation rate can be improved, but heavy metal pollution is caused
Solution Approach 1:
The invention converts the problem of needing external additives into a beneficial genetic modification approach. By knocking out OsLEC1, the method eliminates the requirement for harmful heavy metal elements while achieving differentiation enhancement, thus converting what would be a harmful dependency into a clean, sustainable solution
Data Source
AI summary
The present disclosure provides an application method in rice callus differentiation based on an Oryza sativa Leafy Cotyledon 1 (OsLEC1) gene, including the steps of: selecting guide ribonucleic acid (gRNA) target sites; cloning tandem fragments including gRNA; ligating each gRNA fragment; performing polymerase chain reaction (PCR) amplification on a ligation product; performing enzyme digestion on the purified product and a target vector; transforming the ligated vector; performing Agrobacterium-mediated genetic transformation of rice; and screening and identifying transgenetic plants. In the present disclosure, the differentiation of callus directly affects the emergence efficiency of transgenic plants. The knockout of OsLEC1 can promote the differentiation of rice callus, suggesting that OsLEC1 can serve as an important target gene for improving the transformation efficiency of rice and even gramineous crops. OsLEC1 can be used as a starting point to construct various molecular tools to enhance transformation efficiency.