Transgenic Phytochrome Modulation for Low Light Crop Yield
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Solution Overview
Problem
Plants grown under low light conditions typically exhibit reduced crop yields due to increased hypocotyl elongation, which leads to less wind resistance and easier lodging, resulting in suboptimal growth and productivity.
Innovation Solution
Introduction of exogenous nucleic acids encoding polypeptides with 80% or greater sequence identity to specific amino acid sequences, which are operably linked to regulatory regions, to modulate low light tolerance in plants, reducing hypocotyl length and enhancing growth under low light irradiance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If plants are grown under low light conditions, then photosynthesis and energy production are reduced, but hypocotyl elongation increases leading to reduced plant stability and lower crop yields
Solution Approach 1:
The patent modifies the expression level of phytochrome proteins (specifically PHYA and PHYB) through genetic transformation to alter the plant's light sensing parameters. This changes the plant's response to low light conditions, suppressing hypocotyl elongation and improving both productivity and stability under suboptimal lighting conditions.
Solution Approach 2:
The patent introduces exogenous nucleic acids encoding phytochrome polypeptides as intermediaries to mediate the plant's response to low light conditions. These introduced genes act as mediators that enable the plant to better sense and respond to low light environments, thereby improving both yield and stability.
2Adaptability or versatility
If traditional plant breeding methods are used to improve low light tolerance, then genetic diversity may be limited, but the breeding process requires extensive time and multiple generations
Solution Approach 1:
The patent replaces the mechanical/time-consuming process of traditional breeding with genetic transformation technology. Instead of crossing plants over multiple generations to achieve desired traits, the invention directly introduces specific genes (PHYA, PHYB) into the plant genome, achieving the desired low light tolerance in a single generation.
3Productivity
If exogenous nucleic acids encoding phytochrome polypeptides are introduced into plants, then low light tolerance and hypocotyl length are improved, but the genetic modification process increases device and process complexity
Solution Approach 1:
The patent uses universal genetic transformation methods and vectors that can be applied across different plant species to introduce phytochrome genes. The transformation system serves multiple functions: delivering the gene, integrating it into the genome, and enabling expression, thereby reducing overall process complexity despite the genetic modification involved.
Data Source
AI summary
Methods and materials for modulating (e.g., increasing or decreasing) low light tolerance in plants are disclosed. For example, nucleic acids encoding polypeptides that confer plants with tolerance to low light are disclosed as well as methods for using such nucleic acids to transform plant cells. Also disclosed are plants having increased low light tolerance and plant products produced from plants having increased low light tolerance.