TY - JOUR
T1 - Light's interaction with pigments in chloroplasts: The murburn perspective
T2 - The murburn perspective
AU - Manoj, Kelath Murali
AU - Manekkathodi, Afsal
N1 - Publisher Copyright:
© 2020
PY - 2021/3
Y1 - 2021/3
N2 - The prevailing understanding on the light reaction of oxygenic photosynthesis (photolytic photophosphorylation & NADPH synthesis) considers the vast majority of the diverse pigments, chlorophyll binding proteins (CBPs) and light harvesting complexes (LHCs) as photon-energy relaying facets; only the chlorophyll a couplets at the reaction center of the two photosystems I & II are deemed to serve as photo-excitable electron emitters. Highlighting the historical perspectives involved, we present reasons why this conventional perception is unmet by theoretical foundations, unsupported by molecular awareness on the various pigments and unverified by physiological data available on chloroplasts. Further, we propose a simple diffusible reactive oxygen species (DROS)-based mechanism for correlating the functions of various light harvesting LHCs and CBPs with the reaction centers of Photosystems I & II. The projected hypothesis may also provide a new perspective to photoreception research.
AB - The prevailing understanding on the light reaction of oxygenic photosynthesis (photolytic photophosphorylation & NADPH synthesis) considers the vast majority of the diverse pigments, chlorophyll binding proteins (CBPs) and light harvesting complexes (LHCs) as photon-energy relaying facets; only the chlorophyll a couplets at the reaction center of the two photosystems I & II are deemed to serve as photo-excitable electron emitters. Highlighting the historical perspectives involved, we present reasons why this conventional perception is unmet by theoretical foundations, unsupported by molecular awareness on the various pigments and unverified by physiological data available on chloroplasts. Further, we propose a simple diffusible reactive oxygen species (DROS)-based mechanism for correlating the functions of various light harvesting LHCs and CBPs with the reaction centers of Photosystems I & II. The projected hypothesis may also provide a new perspective to photoreception research.
KW - Antenna complex
KW - Chlorophyll
KW - Chloroplast
KW - Light harvesting complex
KW - Light reaction of photosynthesis
KW - Murburn concept
KW - Oxygenic photosynthesis
KW - Photolysis
KW - Photophosphorylation
KW - Photoreception
KW - Photosystem
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U2 - 10.1016/j.jpap.2020.100015
DO - 10.1016/j.jpap.2020.100015
M3 - Article
SN - 2666-4690
VL - 5
SP - 100015
JO - Journal of Photochemistry and Photobiology
JF - Journal of Photochemistry and Photobiology
M1 - 100015
ER -