Premium
Light control over the size of an antenna unit building block as an efficient strategy for light harvesting in photosynthesis
Author(s) -
Yakovlev A.G,
Taisova A.S,
Fetisova Z.G
Publication year - 2002
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(02)02238-x
Subject(s) - photosynthesis , antenna (radio) , block (permutation group theory) , unit (ring theory) , control (management) , environmental science , computer science , botany , biology , telecommunications , mathematics , artificial intelligence , combinatorics , mathematics education
It was shown that an increase in the bacteriochlorophyll (BChl) c antenna size observed upon lowering growth light intensities led to enhancement of the hyperchromism of the BChl c Q y absorption band of the green photosynthetic bacterium Chloroflexus aurantiacus . With femtosecond difference absorption spectroscopy, it was shown that the amplitude of bleaching of the oligomeric BChl c Q y band (as compared to that for monomeric BChl a ) increased with increasing BChl c content in chlorosomes. This BChl c bleaching amplitude was about doubled as the chlorosomal antenna size was about trebled. Both sets of findings clearly show that a unit BChl c aggregate in the chlorosomal antenna is variable in size and governed by the grow light intensity, thus ensuring the high efficiency of energy transfer within the BChl c antenna regardless of its size.