21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-08-02 05:07:39

Uncategorized
SO ENDS this first of two weekends on the return to aquatic life of some plants. This is akin to the journey that whales took, returning to the sea after leaving the sea for dry land, equally challenging both anatomically and metabolically. Evolution has numerous examples of similar reversals, classically, flightless birds. With an engine that generates constant diversity in search of a purpose, evolution has this ability sometimes to go one step forward and two steps back. View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments

linkedin post 2020-08-02 04:56:31

Uncategorized
SO ENDS this first of two weekends on the return to aquatic life of some plants. This is akin to the journey that whales took, returning to the sea after leaving the sea for dry land, equally challenging both anatomically and metabolically. Evolution has numerous examples of similar reversals, classically, flightless birds. With an engine that generates constant diversity in search of a purpose, evolution has this ability sometimes to go one step forward and two steps back. View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-08-02 04:56:07

linkedin post 2020-08-02 04:56:07

Uncategorized
SALT TOXICITY. "Specific to marine environments, seagrasses are often exposed to high salt levels and short-term salinity fluctuations in the coastal and estuarine system. Increased levels of sodium (Na+) are known to be toxic, partly due to the fact that both Na+ and potassium (K+) have very similar physicochemical properties." http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8 View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-08-02 04:55:47

linkedin post 2020-08-02 04:55:47

Uncategorized
NEW CHALLENGES. "Submergence also exposes organisms to the forces of wave action and tidal currents that effects reproductive functions and reduces the availability of carbon dioxide (CO2). Consequently, seagrasses have evolved to propagate via hydrophilous pollination and rely on carbonic acid and bicarbonate instead of CO2." http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8 View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-08-02 04:55:29

linkedin post 2020-08-02 04:55:29

Uncategorized
ANAEROBIC SEDIMENT. "One factor contributing to these high light requirements is the reducing sediments to which seagrasses are rooted. These sediments challenge seagrass root tissues with anaerobic conditions since marine sediments are often oxygen deficient. When the internal transport of oxygen from shoot to root tissues is not sufficient, seagrasses can be forced to resort to fermentative metabolism." http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8 View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-08-02 04:55:09

linkedin post 2020-08-02 04:55:09

Uncategorized
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
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2020-08-02 04:54:27

linkedin post 2020-08-02 04:54:27

Uncategorized
PARALLEL EVOLUTION OF SEAGRASSES. "Phylogenetic analysis of members of the entire order, based on the plastid gene encoding for RuBisCO large subunit, indicates that the return into the sea occurred at least three times independently through parallel evolution from a common aquatic-freshwater ancestor of terrestrial origin." http://bmcevolbiol.biomedcentral.com/articles/10.1186/1471-2148-11-8 View in LinkedIn
Read More