21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-09-26 03:26:48

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THE GREAT ALGAL JUMP. "Algae dominated the oceans of the precambrian time over 700 million years ago. Between 500 and 400 million years ago, some algae made the transition to land, becoming plants by developing a series of adaptations to help them survive out of the water." https://lnkd.in/d6dpu-q View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-09-26 03:24:46

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CANDIDATE ALGAE. "Fossil and biochemical evidence indicates plants are descended from multicellular green algae. Various green algal groups have been proposed for this ancestral type, with the Charophytes often being prominently mentioned. Cladistic studies support the inclusion of the Charophytes (including the taxonomic order Coleochaetales) as sister taxa to the land plants." https://lnkd.in/d6dpu-q View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-09-26 03:23:47

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ALGAE ANCESTORS. "Land plants, also called embryophytes, descended from freshwater algae about 480 Ma. Most of the major phylogenetic groups of land plants now have at least one high-quality draft or reference genome sequence." http://rstb.royalsocietypublishing.org/content/369/1648/20130355.short View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-09-26 03:21:37

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EARLY PLANT SEEDS. "However, do we generally appreciate the evolution of this adaptation, much less the diverse effects it has had on terrestrial ecosystems and, indeed, our own culture? No. We take it for granted, even though land plants evolved the seed millions of years before the first amniote is recorded in the fossil record." https://academic.oup.com/bioscience/article/65/6/626/304981/Seeds-and-Fruits-Underwriting-the-Diversity-of View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-09-27 03:02:46

linkedin post 2020-09-27 03:02:46

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SUBMERGED LIFE. "The photosynthetic apparatus needs to be modulated to accommodate the changes in light attenuation through the water depth. Consequently, the overall light intensity is decreased and the wavelength composition of sunlight reaching underwater plants is different. Accordingly, seagrasses have one of the highest light requirements among angiosperms." http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8 View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-09-26 03:19:26

linkedin post 2020-09-26 03:19:26

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PLANT TRANSITION TO DRY LAND. "Plants faced precisely the same problem: that of the pteridophytic life cycle with its free-living gametophytes and swimming sperm in need of freestanding water, being dragged from their supportive environment by the increasingly complex sporophytic adaptations to life on land." https://academic.oup.com/bioscience/article/65/6/626/304981/Seeds-and-Fruits-Underwriting-the-Diversity-of View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-09-26 03:17:28

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FRAGMENT FROM NATURE explores for this and next weekend the ancient transition of plants from the water to dry land, and then those that returned to salt water. Those plants that re-adapted to salt water are the focus of this fragment. This is the sister posting to match the one about the return of the whales to the sea a couple of weeks ago. Like the whales, plants returning to the sea had to reinvent solutions to metabolic problems including salt toxicity, low CO2 diffusion rates, and low light levels. View in LinkedIn
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21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-09-29 03:11:30

linkedin post 2020-09-29 03:11:30

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WHOLE PLANT MEMORY. "But can it be found also on the whole plant level? One promising example is the developmental memory represented by reaction of axillar buds of Scrophularia cuttings to leaf removal, demonstrated by classical experiments of R. Dostál from the 1960s, or later experiments demonstrating specific response of Bidens axillar buds to cotyledon injury in decapitated plants. later experiments demonstrating specific response of Bidens axillar buds to cotyledon injury in decapitated plants.” http://www.tandfonline.com/doi/full/10.4161/psb.4.5.8276#abstract View in LinkedIn
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