photosystem

British

/ ˈfəʊtəʊˌsɪstəm /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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 • Nov. 28, 2023

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 • Nov. 28, 2023

After the photon hits, photosystem II transfers the free electron to the first in a series of proteins inside the thylakoid membrane called the electron transport chain.

From Textbooks • Apr. 25, 2013

As the electron from the electron transport chain arrives at photosystem I, it is re-energized with another photon captured by chlorophyll.

From Textbooks • Apr. 25, 2013

A synthetic genome in yeast allows complex and rapid sequence manipulation to create synthetic chloroplast genomes; in fact, several photosystem proteins from Scenedesmus obliquus were found to function in .

From Nature • Aug. 15, 2012

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023