Definition of photosystem in English:


Syllabification: pho·to·sys·tem
Pronunciation: /ˈfōtōˌsistəm


  • A biochemical mechanism in plants by which chlorophyll absorbs light energy for photosynthesis. There are two such mechanisms ( photosystems I and II) involving different chlorophyll-protein complexes.
    More example sentences
    • In photosystem II, a different chlorophyll-protein complex absorbs light at the wavelength of 680 nm.
    • Both types of photosystems differ in size, pigment and protein composition, and charge.
    • In higher plant chloroplasts, many pigment-binding proteins are inserted into the thylakoid membrane and organized into multisubunit complexes called photosystems.

More definitions of photosystem

Definition of photosystem in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day skosh
Pronunciation: skōSH
a small amount; a little