photosystem

/ ˈfəʊtəʊˌsɪstəm /

noun

1. botany either of two pigment-containing systems, photosystem I or II, in which the light-dependent chemical reactions of photosynthesis occur in the chloroplasts of plants

Example Sentences

An early stage that involved cyanobacteria innovating a new pigment, chlorophyll f, enabling the photosystem to harvest far-red light for the first time.

From Science Daily

In addition, they developed a modified photosystem that could use this pigment to power the oxygen release reaction using only the lower energy red light.

From Science Daily

The late stage, occurring approximately 2 billion years ago, further optimized the capacity to harvest far-red light by evolving a second modified photosystem incorporating chlorophyll f at critical locations.

From Science Daily

How might corallicolids avoid the toxic chemical effects resulting from the excitation of chlorophyll by light when they lack the normal outlet of a photosystem?

From Nature

Bell, A. J., Frankel, L. K. & Bricker, T. M. High yield non-detergent isolation of photosystem I-light-harvesting chlorophyll II membranes from spinach thylakoids: implications for the organization of the PS I antennae in higher plants.

From Nature