All existing photosynthetic species are descended from a single evolutionary line of cells' primitive photosynthetic operon. The existence of a mitoplastide genome in an aerobic oxygen-non-producing proto-eukaryote was hypothesised in this proposal. The entire mitochondrial replicon and photosynthetic gene cluster are contained within this genome, which is surrounded by membrane. Mitoplastide genome duplication and gene function replacement result in the development of the water splitting-PSII superoperon in plants. Mitoplastide genomes include two functionally polarised replicons (mitochondrial and plastid's) after both events. The diameter of the Earth and the brightness of the Sun at the time when life began are the fundamental driving forces in gene modelling and functional replacements in photosynthetic genes replicon. Mitochondrion and chloroplast were formed in three stages. A replication fork first stops before collapsing, causing a break in the mitoplastide genome. Second, complementary strands invaded and repaired the double-strand break. Third, reciprocal genetic recombination separated the duplicated genome into two compartments. Fission of the mitoplastide membrane occurred simultaneously with genetic recombination, resulting in two compartments, mitochondrial and plastid.
Author(S) Details
Milanko Stupar
Institute for Nuclear Science Vinca, Beograd, Serbia.
Slavica Stefanovic
Institute for Nuclear Science Vinca, Beograd, Serbia.
View Book:- https://stm.bookpi.org/NVBS-V6/article/view/4858
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