linkedin post 2018-09-09 04:07:01

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BOUNDARIES. "In order for lateral primordia to distinguish themselves as a population of cells separate from the shoot apical meristem (SAM), a meristem-to-organ boundary must be created. Mutants lacking appropriate genetic mechanisms for separation of organ primordia into distinct lateral organs are considered to be mutants in the process of ‘boundary formation’." https://lnkd.in/dD4GcAS View in LinkedIn
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linkedin post 2018-09-07 04:14:25

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DYNAMIC PROCESS. "While gene family evolution is pervasive, it may be especially important in our own evolution since it appears that the "revolving door" of gene duplication and loss has undergone multiple accelerations in the lineage leading to humans." http://www.ncbi.nlm.nih.gov/pubmed/19153999 View in LinkedIn
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linkedin post 2018-09-08 06:18:53

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LABILE FUSIONS. "Fusion tends to be more labile in the outermost perianth than in petals, a phenomenon that may predict different genetic mechanisms underlying organ separation. In some cases, developmental characters within a flower are highly correlated with fusion of particular tissues; for example, early fusion of petals is predominantly found in flowers with inferior ovaries and reduced sepal whorl(s)." https://lnkd.in/dD4GcAS View in LinkedIn
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linkedin post 2018-09-08 06:15:45

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EARLY FUSIONS. "However, the capacity for fusion of plant parts was clearly present in early angiosperms, as basal fusion of the outermost perianth can even be found in the early diverging Amborella, in which a short fusion zone among the tepals occurs before the fusion with the stamen whorl, as well as in the early diverging lineages, including Cabomba, Canellales, Aristolochiaceae, Myristicaceae and Degeneria (Magnolialaes)." https://lnkd.in/dD4GcAS View in LinkedIn
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linkedin post 2018-09-08 06:13:43

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LATER FUSION EVOLUTION. "Fusion of parts does not become a major element in angiosperm evolution until the establishment of whorled floral phyllotaxy and the establishment of a fixed meristem, or the arrangement of the flower into defined whorls comprising regular multiples of organs." https://lnkd.in/dD4GcAS View in LinkedIn
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linkedin post 2018-09-08 06:09:04

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GYNOECIUM FUSIONS. "The fusion of individual carpels into a gynoecium occurred several times independently among angiosperms and proceeded through separate developmental mechanisms; either via fusion at the centre of the gynoecium resulting in axile placentation or fusion into a unilocular ovary with parietal placentation. Both types may have evolved independently from unfused carpels." https://lnkd.in/dD4GcAS View in LinkedIn
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