Disrupting NPQ to Enhance Algal Biomass Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Photosynthetic microorganisms face challenges in maximizing biomass production due to light penetration limitations in deep cultures, leading to sub-optimal light exposure and potential photooxidative damage from excess light, which is exacerbated by the activation of Non-Photochemical Quenching (NPQ) processes that reduce overall photosynthetic efficiency.
Innovation Solution
Disrupting the NPQ process in photosynthetic microorganisms by reducing the production or expression of carotenoids and carotenoid-binding proteins, such as the Orange Carotenoid Protein (OCP), allowing these organisms to thrive in deeper cultures with active mixing, thereby enhancing biomass production and biomolecule yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If light penetration depth is increased to grow more cells, then biomass production increases, but light intensity at deeper levels becomes insufficient for photosynthesis
Solution Approach 1:
The patent applies parameter changes by modifying the optical properties of the culture system. Specifically, it changes the absorption and scattering characteristics of the medium through the use of fluorescent particles that convert UV light to visible light, thereby improving light penetration and intensity at deeper culture levels without changing the physical depth parameter itself.
2Reliability
If NPQ process is activated to protect from photooxidative damage, then cell survival improves, but photosynthetic efficiency decreases due to energy dissipation
Solution Approach 1:
The patent converts the harmful effect of excess light energy into a beneficial outcome by using fluorescent particles to absorb UV radiation (which would cause photooxidative damage) and re-emit it as visible light that can be used for photosynthesis. This transforms a harmful factor into a useful resource, improving both cell protection and photosynthetic efficiency simultaneously.
Solution Approach 2:
The fluorescent particles act as an intermediary between UV light and the photosynthetic apparatus. They mediate the interaction by absorbing UV radiation and converting it to visible light, thereby protecting the cells from direct UV damage while still providing usable light energy for photosynthesis.
3Object-affected harmful factors
If carotenoid production is increased to enhance photoprotection, then resistance to high light stress improves, but biomass yield decreases due to energy diversion to NPQ
Solution Approach 1:
Instead of using carotenoids for photoprotection (which diverts energy from biomass production), the patent converts harmful UV radiation into beneficial visible light through fluorescent particles. This approach provides photoprotection without the metabolic cost of carotenoid synthesis, thereby maintaining high biomass yield while still protecting against light stress.
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
The disrupted NPQ process results in increased biomass and biomolecule production by up to 30% compared to control cultures, as the microorganisms are less hindered by light limitations and photooxidative stress, allowing for more efficient light utilization and improved growth conditions.
Implementation Method 1
The present invention utilizes fluorescent particles that absorb ultraviolet (UV) light and emit light in the visible spectrum with wavelengths between 400-700 nm
Implementation Method 2
Photosynthesis is the conversion of light energy to chemical energy by biological systems
Implementation Method 3
The qE component of NPQ is a protective mechanism that quenches singlet-excited chlorophylls (Chl) and harmlessly dissipates excess excitation energy as heat
Data Source
AI summary
The invention provides a method of producing biomass or at least one biomolecule comprising culturing a photosynthetic microorganism that comprises a disrupted Non-Photochemical Quenching (NPQ) process, and isolating biomass or at least one biomolecule from the culture.