Category: Uncategorized

SMALL SEEDS. "Accessory costs of reproduction frequently equal or exceed direct investment in offspring, and can limit the evolution of small offspring sizes. Early angiosperms had minimum seed sizes, an order of magnitude smaller than their contemporaries." https://lnkd.in/e6Ry-qh View in LinkedIn

TRANSPOSONS KEY. "Transposable elements (TEs) are a dominant feature of most flowering plant genomes...indicate that TEs can explain much about their rapid evolution and diversification. Genome size in angiosperms is highly correlated with TE content and the overwhelming bulk (>80%) of large genomes can be composed of TEs." (Viral fossils). https://lnkd.in/eyHApyP View in LinkedIn

"GENOME SIZE varies c. 2400-fold in angiosperms (flowering plants), although the range of genome size is skewed towards small genomes. There are two major drivers of this astonishing GS diversity: (i) polyploidy, or whole-genome duplication, causing, at least initially, step-wise increases in GS, and (ii) deviation in repeat copy numbers, that can either result in subtle or more dramatic GS changes." http://www.sciencedirect.com/science/article/pii/S0959437X15001057 View in LinkedIn

PUZZLING RANGE. "Genome sizes vary more than 2,300-fold among angiosperms, from that of Paris japonica (2n = 12, 1C = ~149 Gbp) to that of carnivorous Genlisea margaretae (2n = ~40, 1C = ~63 Mbp). The biological significance of this massive variation is puzzling." https://lnkd.in/e4xhW7h View in LinkedIn

SUPER-PLOIDY. "Most flowering plant lineages have undergone multiple rounds of polyploidy in their ancestry, a process that is ongoing in many lineages. Consequently, supposedly diploid species are in fact palaeopolyploids. For example, the ‘diploid’ A. thaliana may be as high as 48-ploid, and ‘tetraploid’ cytotypes (96-ploid) exist in nature." http://www.sciencedirect.com/science/article/pii/S0959437X15001057 View in LinkedIn

WHOLE GENOME DUPLICATION. "Following a WGD in the common ancestor of all extant angiosperms, a complex pattern of both ancient and recent polyploidy is evident across angiosperm phylogeny. In several cases, ancient WGDs are associated with increased rates of species diversification." http://www.sciencedirect.com/science/article/pii/S1369526616300425 View in LinkedIn

"POLYPLOIDY, or whole-genome duplication (WGD), is a ubiquitous feature of plant genomes, contributing to variation in both genome size and gene content. Although polyploidy has occurred in all major clades of land plants, it is most frequent in angiosperms." https://lnkd.in/eebDSft View in LinkedIn

PHYLOGENY OF ANGIOSPERMS. "Phylogenetic analysis of gene sequences has significantly impacted views of angiosperm relationships. Consequently, the overall phylogeny of angiosperms has been radically revised at all levels." https://lnkd.in/eZS95mc View in LinkedIn

NUTRITIONAL ASPECTS. "A species with a large genome size might require a large supply of nutrients (e.g., phosphorus), preventing its establishment in nutrient-limited environments. Thus, there may be selection against duplicating genome sizes in species with especially large content." https://lnkd.in/bCmw3Fr View in LinkedIn

Goodbye, Earth: 'We're going to live on Mars in 2027' View in LinkedIn