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GENETIC NOVELTY. "Transposable elements (TEs) are the key players in generating genomic novelty by a combination of the chromosome rearrangements they cause and the genes that come under their regulatory sway. Genome size, gene content, gene order, centromere function, and numerous other aspects of nuclear biology are driven by TE activity." https://lnkd.in/daec-Ac View in LinkedIn

SPARED UNTIL LAST. "Autolytic changes in the cell do not extend injtially to the mitochondria or nucleus, both of which remain unaffected until very late in the process of senescence." https://lnkd.in/dNWP3KD View in LinkedIn

SECOND PROPOSITION. "Second, viruses and mobile elements contribute specific genes that play major roles in the emergence of coherent wholes at a new level of complexity." https://lnkd.in/dwWBEqU View in LinkedIn

PLUNDERING THE LEAF SOURCES. ">50% of the protein and 70% of the lipid is associated with the chloroplasts.Consequently, the initial stages of the senescence syndrome involve a breakdown of membrane structure within the chloroplast." https://lnkd.in/dNWP3KD View in LinkedIn

FIRST PROPOSITION. "Here, I present evidence and argument that selfish elements make key contributions to evolutionary transitions at least at two levels. First, the parasite–host arms race leads to increased organizational complexity of biological systems, i.e. serving as a catalyst of evolutionary transitions." https://lnkd.in/dwWBEqU View in LinkedIn

REDIRECTED ENERGY. "In theory, the progressive senescence of existing somatic tissues reflects the minimum energy spent on maintenance of these tissues - energy that is thus available for seed development." https://lnkd.in/dNWP3KD View in LinkedIn

BROAD SPECTRUM. "The relationships between genomic parasites and their hosts encompass a wide range of ‘selfishness’, i.e. the parasites form a broad spectrum with respect to the cost they incur on the host." https://lnkd.in/dwWBEqU View in LinkedIn

SOMATIC DECLINE. "After fertilization and as the seeds mature, the somatic tissues of the plant become increasingly senescent. However, if reproduction is delayed, anatomically definable vegetative meristems can initiate in axils of older leaves." https://lnkd.in/dNWP3KD View in LinkedIn

SENESCENCE SYNDROME. "However, photosynthetic organs are rich in nutrients, which would be lost without mechanisms that salvage them before the obsolete organs are cast off. We refer to this salvage process as the senescence syndrome." https://lnkd.in/dNWP3KD View in LinkedIn

ANCIENT PROCESS. "It is not surprising that plants have evolved mechanisms for dealing with obsolete organ systems. The shedding of leaves by the process of abscission is a very ancient trait - fossils from as early as the Devonian period (i.e., -400 million years ago) show evidence of abscission scars." https://lnkd.in/dNWP3KD View in LinkedIn