Cambridge O Level Biology · Syllabus 5090 · Plant Nutrition
Plateau on a Photosynthesis Rate Graph
What is Plateau on a Photosynthesis Rate Graph?
The flat region of a rate graph, in which further increases in the factor on the horizontal axis produce no further increase in the rate of photosynthesis. It shows that this factor is no longer in shortest supply and that a different factor has become limiting. A plateau is a constant high rate, not a stopped process.
This definition is part of the Plant Nutrition chapter in Cambridge O Level Biology.
Last reviewed Syllabus 2026-2028

