linkedin post 2019-12-01 07:04:28

linkedin post 2019-12-01 07:04:28

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REPURPOSED PATHWAYS. "We propose that this mechanism might have operated originally in the context of primitive plant apices to facilitate bifurcation. Recruitment of this pathway to form leaves occurred independently and in parallel in different plant lineages." Another case of bolt-on evolution. http://www.nature.com/nature/journal/v434/n7032/abs/nature03410.html View in LinkedIn
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linkedin post 2019-12-01 07:02:58

linkedin post 2019-12-01 07:02:58

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NOT TWO PATHWAYS. "Here we show that this is not so. Gene expression data from a microphyllous lycophyte, phylogenetic analyses, and a cross-species complementation experiment all show that a common developmental mechanism can underpin both microphyll and megaphyll formation." http://www.nature.com/nature/journal/v434/n7032/abs/nature03410.html View in LinkedIn
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linkedin post 2019-12-01 07:02:03

linkedin post 2019-12-01 07:02:03

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TWO PATHWAYS. "Our current understanding of how leaves develop is restricted to processes that operate during megaphyll formation. Because microphylls and megaphylls evolved independently, different mechanisms might be required for leaf formation." http://www.nature.com/nature/journal/v434/n7032/abs/nature03410.html View in LinkedIn
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linkedin post 2019-12-01 06:59:32

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INDEPENDENT EVOLUTION. "Originally coined to emphasize morphological differences, ‘microphyll’ and ‘megaphyll’ became synonymous with the idea that vascular plant leaves are not homologous. Although it is now accepted that leaves evolved independently in several euphyllophyte lineages, ‘megaphyll’ has grown to reflect another type of homology, that of euphyllophyte leaf precursor structures." http://www.sciencedirect.com/science/article/pii/S1360138508002987 View in LinkedIn
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linkedin post 2019-12-01 06:58:12

linkedin post 2019-12-01 06:58:12

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LITTLE LEAF AND BIG LEAF LINEAGES. "In extant plants, these events are represented by microphyllous leaves in lycophytes (clubmosses, spikemosses and quillworts) and megaphyllous leaves in euphyllophytes (ferns, gymnosperms and angiosperms)." http://www.nature.com/nature/journal/v434/n7032/abs/nature03410.html View in LinkedIn
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linkedin post 2019-12-01 06:56:33

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PLANT EMERGENCE. "Vascular plants evolved in the Middle to Late Silurian period, about 420 million years ago. The fossil record indicates that these primitive plants had branched stems with sporangia but no leaves. Leaf-like lateral outgrowths subsequently evolved on at least two independent occasions." https://lnkd.in/dkj5_Ru View in LinkedIn
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linkedin post 2019-12-03 06:53:03

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PREDICTING MEMORY FAILURE. “Researchers developed an algorithm that predicted with high accuracy whether a person would remember a given word. By stimulating the brain only when a person read words that were likely to be forgotten, the researchers could boost performance by up to 140%. Penn psychologist Michael Kahana says that the team has recorded from the brains of about 80 people in total and is seeking regulatory approval to use a more precise electrode array.” https://lnkd.in/d6RG5sQ View in LinkedIn
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