Summary
Strategies include improving rubisco, adding carbon concentrating mechanisms and optimising canopy light use.
In depth
Typical efficiency of crops is 1 to 2 percent of solar energy into biomass. Targets: faster recovery from non-photochemical quenching, introducing the C4 pathway into rice, and improved rubisco or photorespiratory bypasses.
Efficiency limits include light reaction losses, rubisco kinetics and canopy architecture. Projects such as RIPE aim to raise yields via synthetic biology. Trade-offs and field testing are crucial.
Key idea: even small gains in photosynthesis across crops could help global food supply.
Theoretical maximum efficiency for C3 crops is about 4.6 percent and for C4 about 6 percent, much higher than the 1 to 2 percent usually achieved. Targets include speeding recovery from non-photochemical quenching (Kromdijk et al. 2016 raised tobacco biomass by about 15 percent by overexpressing three genes), improving rubisco and its activase, adding photorespiratory bypasses, introducing carbon concentrating mechanisms (carboxysomes, pyrenoids) and improving canopy architecture so that light penetrates deeper.
The C4 Rice Project and RIPE project aim to raise yields. Synthetic pathways in microbes and cell-free systems (the CETCH cycle) fix CO2 faster than natural ones. Increasing efficiency could help feed a growing population, though water, nutrients and breeding must keep pace, and field tests confirm greenhouse results.
Example: in the RIPE project, field trials of soybean with improved photosynthesis showed yield gains of around 20 percent.
Frequently asked questions
What is Photosynthesis Efficiency Engineering?
Strategies include improving rubisco, adding carbon concentrating mechanisms and optimising canopy light use.
Which area of biology covers Photosynthesis Efficiency Engineering, and how advanced is it?
Photosynthesis Efficiency Engineering is one of the 56 topics in Plant Biology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Photorespiration, Rubisco, C4 Photosynthesis.
Can you give an example of Photosynthesis Efficiency Engineering?
Tobacco engineered with shortcut photorespiration pathways grew bigger in field trials.
What should I learn before Photosynthesis Efficiency Engineering?
Work through the Beginner topics in Plant Biology first, such as Plant Kingdom, Photosynthesis, Chlorophyll, then return to Photosynthesis Efficiency Engineering. Advanced topics assume the Intermediate vocabulary.
What topics are related to Photosynthesis Efficiency Engineering?
The closest topics to Photosynthesis Efficiency Engineering are Photorespiration, Rubisco, C4 Photosynthesis, Limiting Factors of Photosynthesis. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Photosynthesis Efficiency Engineering?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Photosynthesis Efficiency Engineering. To practise the whole of Plant Biology, use the Plant Biology quiz.
How is Photosynthesis Efficiency Engineering different from Photorespiration?
Photosynthesis Efficiency Engineering: Strategies include improving rubisco, adding carbon concentrating mechanisms and optimising canopy light use. Photorespiration: Rubisco binds oxygen instead of carbon dioxide, wasting energy and releasing CO2. Read both side by side and note what each one explains.
How should I study Photosynthesis Efficiency Engineering step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Photorespiration and explain the difference aloud. Finally, take the Plant Biology quiz and come back to this page for any question you miss.