Rotating Container Cultivation for Low-Shear Plant Cell Aggregates
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Solution Overview
Problem
Existing methods for cultivating plant cell aggregates, particularly sugarcane embryogenic callus, face challenges in achieving uniform distribution of oxygen and nutrients without generating shear stresses, leading to cell disintegration and low conversion rates of somatic embryos, which are costly and lack scalability for commercial planting.
Innovation Solution
A process using rotating containers with controlled horizontal axis rotation, calculated according to the Froude equation, ensures uniform distribution of nutrients and oxygen to plant cell aggregates, reducing shear stresses and maintaining an undifferentiated embryogenic profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional static culture methods are used for plant cell aggregates, then操作简单 (operation is simple), but oxygen and nutrient distribution is non-uniform leading to cell disintegration
Solution Approach 1:
The patent applies dynamic rotation of containers to transform the static culture environment into a dynamic one. By rotating containers at controlled speeds (Froude number 0.03-0.08), the system creates continuous movement that enhances oxygen and nutrient distribution throughout the cell aggregate, preventing the non-uniform distribution and cell disintegration observed in static cultures.
Solution Approach 2:
The patent utilizes fluid dynamics principles by controlling the rotation of containers to create optimal fluid flow patterns around cell aggregates. The hydraulic conditions are optimized through Froude number control, ensuring proper oxygen and nutrient transport to all cells while maintaining aggregate integrity.
2Quantity of substance
If high shear stress is applied to cell aggregates for mixing, then oxygen and nutrient distribution improves, but cell disintegration increases
Solution Approach 1:
The patent changes the physical parameters of the culture system by controlling rotation speed within specific Froude number ranges (0.03-0.08). This parameter optimization ensures sufficient mixing and oxygen/nutrient distribution while keeping shear stresses below damaging thresholds, thus preventing cell disintegration.
Solution Approach 2:
By implementing controlled rotational movement rather than static or high-shear mixing, the system dynamically adjusts oxygen and nutrient delivery to match cell requirements without applying excessive mechanical stress that would cause disintegration.
3Productivity
If conventional micropropagation methods are used, then some plant propagation is achieved, but scalability for commercial planting is insufficient and costs are high
Solution Approach 1:
The patent segments the large-scale culture system into multiple rotating containers, each maintaining optimal conditions for cell aggregate growth. This modular approach enables scalable production for commercial purposes while keeping individual unit operations simple and cost-effective.
Solution Approach 2:
By optimizing the Froude number parameter range (0.03-0.08), the system achieves high productivity in cell aggregate multiplication and somatic embryo conversion. This parameter optimization reduces operational costs by eliminating the need for complex intervention protocols and improving overall process efficiency.
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 enhances cell multiplication efficiency, maintains biological viability, and increases germination rates of sugarcane embryos, reducing somaclonal variation and operational costs, facilitating large-scale commercial production.
Implementation Method 1
the coefficient between the angular speed of rotation of the containers and their respective radii is calculated according to the Froude equation (Fr) and varies from at least about 0.01 to 0.2
Data Source
Figure 1A~2
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AI summary
The present invention relates to the field of biotechnology. More precisely, a process of growing cell aggregates in a system of containers rotating around their own horizontal axes is described. The invention also describes the cell aggregates used in the cultivation process and a method of micropropagating plant cells that comprises inoculating the plant cells in said containers with rotation around their own horizontal axes.