Fig 3 - uploaded by Muhammad Jaskani
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1 Diagrammatic presentation of the endosymbiosis theory, according to which, complex life forms are originated from the simpler organisms. According to this theory, aerobic and photosynthetic bacteria established a symbiotic relationship inside the ancestral eukaryotic cell. By this evolutionary recruitment, the host cell transformed into a complex autotrophic plant cell, and aerobic and photosynthetic bacteria encapsulated as mitochondria and chloroplast, respectively.
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Trait diversity in horticultural crops is orchestrated by a complex but orderly network of genes. Recent advances in genome and molecular analyses have made it possible to dissect and understand the hidden cues of trait diversity at molecular level. These developments offer new opportunities to improve valuable traits in crops using genomic tools....
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... presence of cell organellar genome is a rule rather than exception in plants. Why plants have such genomes is one of the fundamental questions of plants evolutionary biology. A putative answer was proposed by the Russian biologist Konstantin Mereschcowsky in the form of famous endosymbiotic theory ( Fig. 3.1). According to this theory, smaller and less complex cells develop symbiotic relationships which appear to be the main driving force in the evolution of more complex cells. According to this, the ancestral eukaryotic cell engulfed an aerobic bacterium (proteobacteria) and a cyanobacterium in two consecutive events of cellular evolution ...
