Far-Red Light Converter for Phytochrome Pfr to Pr Conversion
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Solution Overview
Problem
Conventional methods for inducing flowering in short-day plants require light deprivation, which is time-consuming and inefficient, and do not effectively utilize the phytochrome system to accelerate the conversion of inactive phytochrome (Pfr) to active phytochrome (Pr) for promoting flowering.
Innovation Solution
Exposing short-day plants to a flash of far-red light in the 730-780 nm wavelength range, timed at sunset or before darkness, to rapidly convert Pfr to Pr, thereby simulating additional hours of darkness and triggering flowering without the need for light deprivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light deprivation systems are used to induce flowering in short-day plants, then flowering can be triggered, but the process is time-consuming and inefficient
Solution Approach 1:
The patent changes the light wavelength parameter from conventional red light (600-680 nm) to far-red light (730-780 nm) to directly trigger phytochrome conversion. This parameter change allows flowering induction in a fraction of the time required by conventional light deprivation methods, transforming a time-consuming process into a rapid response system.
Solution Approach 2:
The patent applies far-red light exposure as a preliminary action before the natural dark period to pre-convert Pfr to Pr. This preliminary conversion of phytochrome forms primes the plant's flowering mechanism, allowing the flowering process to begin earlier and complete more quickly than waiting for natural dark-period conversion.
2Productivity
If conventional light deprivation methods are used, then flowering is triggered, but the phytochrome system is not effectively utilized to accelerate conversion
Solution Approach 1:
The patent replaces the mechanical approach of light deprivation (physically blocking light with screens or shutting off lights) with an optical approach using far-red light wavelength. This substitution directly activates the phytochrome photoreceptor system, converting Pfr to Pr through photochemical action rather than relying on temporal darkness, thereby improving efficiency and reducing energy waste.
Solution Approach 2:
The patent introduces far-red light as an intermediary that mediates the conversion between Pfr and Pr forms of phytochrome. This intermediary light wavelength acts as a direct trigger for the phytochrome system, bypassing the need for prolonged darkness and enabling controlled, efficient flowering induction without the energy losses associated with conventional light deprivation.
3Ease of operation
If light deprivation is implemented, then flowering can be induced, but it requires complex systems and operations
Solution Approach 1:
The patent extracts the essential function of light deprivation (triggering Pfr to Pr conversion) and isolates it to a specific far-red light wavelength application. Instead of implementing complex light deprivation systems with screens, timers, and complete darkness protocols, the invention extracts only the critical photochemical conversion step and achieves it through targeted far-red light exposure, dramatically simplifying the operation.
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 accelerates the flowering process in short-day plants, increasing biomass production by up to 16% and allowing for earlier flowering and staged harvesting, while reducing the time required for flowering and optimizing resource utilization in both indoor and outdoor cultivation.
Implementation Method 1
Pfr is induced to convert to Pr rapidly by briefly exposing the short-day plants to a flash of red light in the wavelengths between 730 and 780 nm
Data Source
AI summary
Activation of a far-red light device with a far-red light frequency that includes moonlight light that promotes the conversion of inactive Pfr to active Pr in short-day plants prior to a dark period.