Oscillations in Wheat Chloroplast Photochemical Activity: Effect of Uncouplers

Sayeed, Shabbir A.; Mohanty, Prasanna

doi:10.1007/978-1-4684-5335-5_26

Cited by 2 publications

(1 citation statement)

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“…Obviously, for photosensitive semiconductor structures involved in protophotosynthesis, it is advisable to consider photoinduced generation-recombination processes (well known since the 1960s [535] and that lead to the creation of efficient semiconductor photodetectors, including those beyond the visible spectral range [536][537][538]), which also reproduce some oscillation modes in (bio)chemical systems, including those related to photosynthesis and the corresponding transfer processes. Such processes were investigated for both native photosynthesis and for "subcellular explants" in vitro since 1980s in different forms [539][540][541][542][543][544][545][546][547], not only in tissues of the higher plants but also in purple photosynthetic bacteria pigmented with bacteriochlorophyll a or b, together with various carotenoids, for obtaining the light energy for photosynthesis [548,549]). Developed since the late 1960s, the ideas on kinetic oscillations in semiconductors [550][551][552] agree well with the equivalent concepts for photosynthesis developed in the last quarter of the twentieth century.…”

Section: Similarity Between the Equivalent Circuits Of Semiconductor ...mentioning

confidence: 99%

Photoinduced Self-Organization in “Semiconductor World”: Part I. from Protophotosynthesis to Protomembranes

Gradov,

Gradova

2023

Preprint

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This work is the first part of a series of papers on a comprehensive analysis of the processes of prebiotic self-organization and protophotosynthesis on the surface of semiconductor minerals and in systems of natural dispersed semiconductors. Comprehensive analysis within the framework of the "semiconductor world" concept allows integrating a variety of models on a single physical basis - from ZnS world and FeS world (based on inorganic semiconductors) to the PAH world and aromatic world (including organic semiconductors). Thus, we do not put forward a new alternative hypothesis of chemical evolution - a new "chemical world", but only integrate the evolutionary and geochemical criteria of different "chemical worlds" into a single "physical world", which gives one the opportunity to reconstruct and predict the directions of chemical evolution according to the uniform principles of physical chemistry. In the first part of this series we consider photoinduced self-organization and "photo-controlled" evolution of the early protobiological systems performing solar energy conversion on the surface of dispersed semiconductor minerals capable of (photo)catalyzing and photosensitizing prebiological processes. The latter include a transition from the elementary cycles of photocatalytic reactions on the surface of semiconductors to protophotometabolic cycles and protophotosynthesis, from photophysical processes on the surface of mineral semiconductors to photoinduced membrane potentials, from photocontrolled sorption on the surface of such minerals to the formation of photosensitive protomembranes and selection of photosynthetic structures. The evolutionary approach to the analysis of protobiological mechanisms and protobioenergetics within the framework of the "semiconductor world" concept provides a new approach to the study of the last common point of divergence of protobiological systems, where the emergence principles of different energy supply schemes (like the energy source-specific photoautotrophy and substrate-specific chemoautotrophy) merge at the physicochemical level. The proposed integrating scheme is consistent with most biological, geological, and physicochemical concepts, which ensures its complete cross-checking and internal consistency.

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