Environmental thermal energy fluctuations assist uphill excitation energy transfer from red chlorophylls to the reaction center within plant photosystem I.

Giuseppe Zucchelli¹

¹CNR-Istituto di Biofisica, via Alfonso Corti 12, 20133, Milano, Italy; Dipartimento di Bioscienze, Università degli Studi di Milano, via Giovanni Celoria 26, 20133, Milano, Italy. Electronic address: giuseppe.zucchelli@cnr.it.

PubMed DOI

Abstract

The PSI-LHCI chlorophyll-protein complex is a nano-machine within the photosynthetic system in which a small subset of chlorophyll molecules absorbs light at energies lower than that of the reaction center (RC). Despite this energy mismatch, the low-energy chlorophyll forms (LES) efficiently transfer excitation energy (EET) to the RC, contributing to charge separation. At room temperature, more th…

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