linkedin post 2018-08-26 04:34:13

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CONTROLLING TRANSPOSONS. "Exonization of transposable elements sequences supplies the genome with a source of genetic material for evolution. Uncontrolled activity of transposable elements, however, causes deleterious effects, as evidenced in both plants and animals." https://lnkd.in/dwPiXaA View in LinkedIn
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linkedin post 2018-08-26 04:28:41

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PRESERVING GENOME FIDELITY. "Companion cell DNA does not contribute to the zygotic genome, and therefore reactivation of companion cell transposable elements does not risk the genome fidelity of the next generation. Together with its vital biological function to facilitate fertilization and promote postfertilization development with reduced dependence on water, the ability of the gametophyte to protect the integrity of the zygotic genome has probably contributed to the maintenance of this distinct “generation” during angiosperm evolution." http://www.sciencedirect.com/science/article/pii/S1534580713000427 View in LinkedIn
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linkedin post 2018-08-26 04:23:39

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SILENCING WORK. "Once cell fates are specified within the gametophytes, the current data suggest that “information flow” reverses with the companion cells of the pollen and embryo sac acting to silence transposable elements in the germ cells. Presumably, this would act to reinforce the default systems that repress transposable element activity in somatic cells, perhaps because of an increased requirement for genome integrity in the gametes caused by the gametic chromatin being differently packed from that of somatic cells." http://www.sciencedirect.com/science/article/pii/S1534580713000427 View in LinkedIn
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linkedin post 2018-08-24 03:55:05

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MITONUCLEAR PROTEIN GENES. "Collectively these data demonstrate that MRPs represent an evolutionarily conserved protein family that ties the mitochondrial ribosome and mitonuclear protein imbalance to the mitochondrial unfolded protein response, an overarching longevity pathway across many species.” http://www.nature.com/nature/journal/v497/n7450/abs/nature12188.html View in LinkedIn
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linkedin post 2018-08-26 04:20:58

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EGG DOMINATED FATES. "Fate specification within the reduced gametophytes of flowering plants is also dependent on intercellular signaling. In embryo sacs, the egg, once specified via a hormone gradient, assumes a dominant role and generates signals that determine the fates of its neighbors." http://www.sciencedirect.com/science/article/pii/S1534580713000427 View in LinkedIn
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linkedin post 2018-08-25 08:15:35

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EPIGENETICS AND TRANSPOSONS. "The hypothesis that transposable elements activated in the vegetative cell generate mobile siRNA that reinforces the methylation and silencing of cognate sperm transposable elements. This hypothesis is consistent with the known ability of small RNAs to move between plant cells." (siRNA = small interfering RNAs or silencing RNAs). http://www.sciencedirect.com/science/article/pii/S1534580713000427 View in LinkedIn
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linkedin post 2018-08-25 08:13:24

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EPIGENETIC PROGRAMMING. "Communication between cells of both male and female gametophytes is also apparently important for preserving the integrity of gametic chromosomes by reinforcing the silencing of transposable elements in sperm and egg nuclei." http://www.sciencedirect.com/science/article/pii/S1534580713000427 View in LinkedIn
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