Cotton Fiber Length Control via Ectoapyrase Modulation
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Solution Overview
Problem
Current methods for regulating cotton fiber growth are limited in their ability to precisely control fiber length and expansion, as they do not effectively modulate ectoapyrase activity or gene transcription, which are crucial for fiber elongation and deposition of primary cell walls.
Innovation Solution
The use of extracellular nucleotides such as di-nucleotides, tri-nucleotides, and poorly-hydrolyzable nucleotides, as well as modulators of ectoapyrase gene transcription, such as anti-sense or siRNA inhibitors, and anti-ectoapyrase antibodies, to alter the activity and expression of ectoapyrases, thereby influencing cotton fiber growth. These nucleotides and modulators are applied at specific concentrations to either increase or decrease fiber growth by altering the activity of ectoapyrase enzymes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to regulate cotton fiber growth, then fiber growth can be maintained at natural levels, but precise control of fiber length and expansion is limited
Solution Approach 1:
The patent applies parameter changes by modulating ectoapyrase enzyme activity through various means (chemical inhibitors, RNA interference, antisense oligonucleotides) to alter the concentration of extracellular nucleotides, thereby precisely controlling fiber growth parameters such as length and expansion rate. This enables targeted adjustment of growth kinetics without affecting other developmental processes.
Solution Approach 2:
The patent introduces extracellular nucleotides (ATP, ADP, AMP) as intermediary signaling molecules that mediate between ectoapyrase enzyme activity and fiber growth responses. These nucleotides act as second messengers that transmit growth signals, allowing indirect and precise control of fiber elongation through modulation of nucleotide signaling pathways.
2Length of moving object
If ectoapyrase activity is modulated to increase fiber growth, then fiber length increases, but control over fiber expansion and cell wall deposition becomes challenging
Solution Approach 1:
The patent employs dynamic control strategies by using inducible expression systems and temporally-regulated application of ectoapyrase modulators. This allows the system to adapt fiber growth control at different developmental stages, enabling independent optimization of elongation phase (through ectoapyrase modulation) and maturation phase (through controlled cell wall deposition).
Solution Approach 2:
The patent segments the fiber development process into distinct phases (elongation, expansion, maturation) and applies specific modulation strategies to each phase. During elongation, ectoapyrase activity is modulated to control length, while during expansion and maturation, different regulatory mechanisms are engaged to control cell wall deposition, allowing independent optimization of each parameter.
3Productivity
If conventional growth regulators are used, then fiber growth can be stimulated, but precise modulation of ectoapyrase activity and gene transcription is not achieved
Solution Approach 1:
The patent replaces conventional mechanical/chemical growth regulators with molecular biological approaches (RNA interference, antisense oligonucleotides, CRISPR-based systems) that specifically target ectoapyrase gene transcription and mRNA. This substitution enables precise post-transcriptional and transcriptional control of ectoapyrase levels, providing superior precision compared to conventional bulk chemical regulators.
Solution Approach 2:
The patent introduces specific molecular intermediaries (siRNA, antisense oligonucleotides, transcription factors) that mediate between external control signals and ectoapyrase gene expression. These intermediaries provide high-specificity binding to target sequences, enabling precise modulation of gene transcription and mRNA stability without off-target effects.
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 approach allows for precise modulation of cotton fiber growth, increasing or decreasing fiber length by altering ectoapyrase activity, thereby improving the regulation of fiber elongation and cell wall deposition, as demonstrated by the inhibition or promotion of fiber growth in ovule cultures.
Implementation Method 1
contacting a plant cell with one or more extracellular exogenous nucleotides selected from di-nucleotides, tri-nucleotides, or poorly-hydrolyzable nucleotides at a concentration that modulates growth of one or more cotton fibers
Implementation Method 2
contacting a plant cell with one or more modulators of ectoapyrase gene transcription, wherein the modulation alters the length of one or more cotton fibers
Data Source
AI summary
The present invention includes compositions and methods of modulating the length of one or more cotton fibers in a plant by contacting the plant or tissue derived therefrom with at least one of: a nucleotide; a modulator of ectoapyrase gene transcription; or an anti-ectoapyrase antibody or fragments thereof, at a concentration that modulates growth of one or more cotton fibers.