miPEP166i Peptide for Adventitious Root Formation in Poplar
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Solution Overview
Problem
The functional diversity and potential of microRNA-encoded peptides (miPEPs) in forest trees, particularly Populus species, remain underexplored, limiting their application in promoting agronomic traits such as root development.
Innovation Solution
Identification and exogenous application of a specific small peptide miPEP166i, derived from the primary transcript of miRNA166i, enhances the formation and elongation of adventitious roots in 84K poplar by regulating miR166i expression and targeting genes like PagHB8 and PagREV.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If miPEPs are used to promote plant growth and development, then agronomic traits are improved, but the functional diversity and mechanisms of miPEPs in forest trees remain underexplored
Solution Approach 1:
The patent performs preliminary identification and characterization of miPEP166i sequence and function in poplar before widespread application. By first identifying the peptide sequence from miRNA166i primary transcript and validating its promoter activity on adventitious roots, the research establishes a foundation for future functional exploration and application in forest trees.
2Adaptability or versatility
If transgenic processes are used to manipulate plant phenotypes, then miPEP functions can be studied, but technical challenges and governmental regulations arise
Solution Approach 1:
The patent uses an intermediary approach by applying synthetic miPEP166i peptide directly to plant tissue culture systems. This mediator (the peptide itself) enables functional study and phenotype manipulation without requiring complex transgenic transformation processes, thereby avoiding associated technical challenges and regulatory hurdles while still achieving the desired biological effects.
3Length of moving object
If miPEPs are applied exogenously to promote adventitious root formation, then root development is enhanced, but the specific regulatory mechanisms require further investigation
Solution Approach 1:
The patent establishes a feedback loop for mechanism investigation by observing that exogenous miPEP166i application enhances adventitious root formation, then using this effect to guide further molecular mechanism studies. The observed phenotypic feedback (increased root formation) informs subsequent experiments to elucidate the regulatory pathways, creating an iterative process for mechanism discovery.
Data Source
AI summary
Disclosed are a small peptide miPEP166i and use thereof in plant tissue culture, which relates to the technical field of plant genetic engineering. Through a comprehensive peptidomics workflow, the present disclosure systematically identifies miPEPs in three tissues of 84K poplar. By further translating the sequence within the primary transcript of identified miRNA166i, a root-specifically expressed small peptide, miPEP166i, is obtained. The amino acid sequence of the miPEP166i is as shown in SEQ ID NO.3. Upon verification, exogenous use of synthetically produced miPEP166i promotes the formation and elongation of adventitious roots in 84K poplar. The comprehensive annotation and functional analysis of miPEPs in 84K poplar presented in the present disclosure provide valuable genetic resources for their use in poplar and other forest trees.