Agrobacterium-Mediated Sugar Cane Transformation Using Young Tissue
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Solution Overview
Problem
Agrobacterium-mediated transformation of sugar cane faces challenges with low efficiency and reproducibility due to necrosis induction in cultured tissues, resulting in low transformation frequency.
Innovation Solution
Transforming very young sugar cane tissue or cells less than 28 days post-initiation using Agrobacterium-mediated delivery, involving inoculation and co-cultivation to increase transformation efficiency and regeneration of transgenic plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Agrobacterium-mediated transformation is used to introduce heterologous polynucleotides into sugar cane cells, then genetic manipulation capability is improved, but transformation efficiency is reduced due to necrosis induction
Solution Approach 1:
The patent changes the age parameter of the sugar cane tissue from mature to very young (less than 28 days post-initiation). This parameter change makes the tissue more susceptible to Agrobacterium infection and reduces necrosis, thereby improving transformation efficiency while maintaining genetic manipulation capability
Solution Approach 2:
The patent applies preliminary action by selecting and preparing very young tissue (less than 28 days post-initiation) before the transformation process. This preliminary selection of young, actively dividing tissue creates optimal conditions for Agrobacterium infection and reduces subsequent necrosis, improving overall transformation reliability
2Manufacturing precision
If Agrobacterium-mediated transformation is performed on cultured sugar cane tissue, then heterologous polynucleotide integration is achieved, but transformation frequency is reduced due to necrosis
Solution Approach 1:
The patent changes the tissue age parameter to less than 28 days post-initiation, which increases the metabolic activity and susceptibility of cells to Agrobacterium infection. This parameter change simultaneously improves both the frequency of successful transformations and the quality of polynucleotide integration by reducing necrosis
Solution Approach 2:
The patent uses very young tissue cultures (less than 28 days) that are in an optimal transient state for transformation. These young tissues are more responsive to Agrobacterium infection and can be rapidly processed, increasing transformation frequency while maintaining integration quality
3Adaptability or versatility
If conventional Agrobacterium-mediated transformation methods are used, then genetic manipulation is achieved, but time required for generating transgenic plants is increased
Solution Approach 1:
The patent applies preliminary action by using very young tissue (less than 28 days post-initiation) that is already in an optimal state for transformation. This preliminary preparation eliminates the need for extended culture periods to achieve sufficient susceptibility, thereby reducing the overall time to generate transgenic plants while maintaining genetic manipulation capability
Solution Approach 2:
The patent skips the lengthy period required for mature tissue culture by directly using very young tissue (less than 28 days). This approach rushes through the transformation process more efficiently by exploiting the high susceptibility of young, actively dividing cells, reducing the time required to generate transgenic plants
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 transformation efficiency and reduces the time required for generating transgenic plants by utilizing young sugar cane tissue, thereby improving the genetic manipulation of sugar cane.
Implementation Method 1
A. tumefaciens transfers a particular polynucleotide segment of a tumor-inducing (Ti) plasmid into the nucleus of infected host cells, which subsequently stably integrates into the host's genome
Data Source
AI summary
The present invention provides methods for Agrobacterium-mediated transformation of sugar cane (Saccharum spp.) comprising introducing a nucleotide sequence of interest into a sugar cane callus tissue or cell thereof via Agrobacterium mediated delivery, wherein the sugar cane callus tissue is less than 28 days post-initiation. The invention further provides methods for transforming a sugar cane callus tissue or cell thereof comprising inoculating the sugar cane callus tissue that is less than 28 days post-initiation with an Agrobacterium comprising a nucleotide sequence of interest to produce an Agrobacterium-inoculated sugar cane tissue or cell thereof; and co-cultivating the Agrobacterium and the sugar cane callus tissue to produce a transformed sugar cane callus tissue or cell thereof.