sugar can field, an example of a c4 photosynthesis plant

NEW PAPER: Boosting plant growth via C4 photosynthesis

Our Associate Director and Grantham supervisor Colin Osborne publishes ground breaking research on C4 photosynthesis.

The study, which is the biggest of its kind, shows that plants using C4 photosynthesis grow 20-100% quicker than C3 plants. They do this by altering the shape, size and structure of their leaves and roots. Further, the paper explains why C4 plants grow so rapidly.

C4 photosynthesis

Colin explained why this paper is important. “Photosynthesis powers most life on Earth because it converts solar energy into sugars which are used by plants to grow.

“C4 photosynthesis has evolved in tropical plants to boost sugar production over the more ancient C3 type of photosynthesis. Grasses using C4 photosynthesis dominate the world’s savannas and it is also used by maize and sugarcane to achieve high yields.

“We have known for a long time that C4 photosynthesis explains the rapid growth of record breaking plants, but most plants don’t grow that fast. In fact growth can vary 10 times among plant species. By comparing almost 400 grass species our research has led to unexpected discoveries that will now change the way we think about C4 photosynthesis.”

Plant evolution, crop production and ecosystem ecology

Only 3% of existing plant species have C4 lineages but they account for 25% of terrestrial carbon fixation. C4 grasses include some of the world’s most important food and energy crops. And C4 grassy savannas provide critical ecosystem services for more than a billion people.

Professor Osborne says that understanding C4 photosynthesis reveals a lot about plants. “Understanding how the C4 photosynthetic pathway changes plant growth is crucially important for plant evolution, crop production and ecosystem ecology.

“Unexpectedly, during our study we found that during the critical seedling establishment stage enhancement of the plants are driven largely by a high ratio of leaf area to mass, rather than fast growth per unit leaf area.

“C4 leaves have less dense tissues. This allows more leaves to be produced for the same carbon cost so C4 plants invest more in roots than C3 species.”

Read the paper

Read the full paper in Nature C4 photosynthesis boosts growth by altering physiology, allocation and size.

More on photosynthesis at the Grantham Centre

If this article has got you curious about photosynthesis, then you might be interested in these.

Interplay of photosynthesis and evolution: paper summary. Grantham Scholar Suma Mani explains why a paper by Colin Osborne on the evolution of different types of photosynthesis could help feed the growing global population.

Investigating the thylakoid membrane and photosynthesis by Guy Mayneord. Grantham Scholar Guy Mayneord on the thylakoid membrane and photosynthesis.

Guy’s supervisor Matt Johnson won an award for his work on photosynthesis. Read: Grantham supervisor awarded SEB President’s Medal.  And Matt won an award along with Guy’s other supervisor Neil Hunter. Read: Grantham supervisors awarded Biochemical Society medals.

Edited by Claire Moran. Photo of man in sugar field by FRANK MERIÑO from Pexels.