Photosynthesis Research

, 87:323

Uphill energy transfer from long-wavelength absorbing chlorophylls to PS II in Ostreobium sp. is functional in carbon assimilation

Brief communication

DOI: 10.1007/s11120-005-9002-3

Cite this article as:
Wilhelm, C. & Jakob, T. Photosynth Res (2006) 87: 323. doi:10.1007/s11120-005-9002-3

Abstract

From the algal genus Ostrobium two species are known which express a chlorophyll antenna absorbing between 710 and 725 nm to a different extent. In a comparative study with these two species it is shown that quanta absorbed by this long wavelength antenna can be transferred to PS II leading to significant PS␣II-related electron transfer. It is documented that under monochromatic far red light illumination growth continues with rather high efficiency. The data show that the uphill-energy transfer to PS II reduces the quantum yield under white light significantly. It is discussed that this strategy of energy conversion might play a role in special environments where far red light is the predominant energy source.

Keywords

energy transferfar red lightlight harvestinguphill

Abbreviations

Chl

chlorophyll

ETR

relative electron transport rate

F

fluorescence yield

Fm

maximal fluorescence yield of illuminated sample

ΦPS II

Photosytem II quantum yield

IK

PAR-value characteristic for light saturation

LHC

light harvesting complex

PAM

pulse amplitude modulation

PAR

photosynthetically active radiation

Pmax

maximal rate of photosynthesis

PS

Photosystem

Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Biology I / Plant PhysiologyUniversity of LeipzigLeipzigGermany