Embryophyte

Land plants
Temporal range: (Spores from Dapingian (early Middle Ordovician))
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Streptophyta
Clade: Embryophytes
Engler, 1892[3][4]
Divisions

Traditional groups:

Synonyms

The embryophytes (/ˈɛmbriəˌfts/) are a clade of plants, also known as Embryophyta (/ˌɛmbriˈɒfətə, -ˈftə/) or land plants. They are the most familiar group of photoautotrophs that make up the vegetation on Earth's dry lands and wetlands. Embryophytes have a common ancestor with green algae, having emerged within the Phragmoplastophyta clade of freshwater charophyte green algae as a sister taxon of Charophyceae, Coleochaetophyceae and Zygnematophyceae.[12] Embryophytes consist of the bryophytes and the polysporangiophytes.[13] Living embryophytes include hornworts, liverworts, mosses, lycophytes, ferns, gymnosperms and angiosperms (flowering plants). Embryophytes have diplobiontic life cycles.[14]

The embryophytes are informally called "land plants" because they thrive primarily in terrestrial habitats (despite some members having evolved secondarily to live once again in semiaquatic/aquatic habitats), while the related green algae are primarily aquatic. Embryophytes are complex multicellular eukaryotes with specialized reproductive organs. The name derives from their innovative characteristic of nurturing the young embryo sporophyte during the early stages of its multicellular development within the tissues of the parent gametophyte. With very few exceptions, embryophytes obtain biological energy by photosynthesis, using chlorophyll a and b to harvest the light energy in sunlight for carbon fixation from carbon dioxide and water in order to synthesize carbohydrates while releasing oxygen as a byproduct.

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  9. ^ Cronquist, A.; Takhtajan, A.; Zimmermann, W. (1966). "On the Higher Taxa of Embryobionta" (PDF). Taxon. 15 (4): 129–134. doi:10.2307/1217531. JSTOR 1217531.
  10. ^ Whittaker, R. H. (1969). "New concepts of kingdoms or organisms" (PDF). Science. 163 (3863): 150–160. Bibcode:1969Sci...163..150W. CiteSeerX 10.1.1.403.5430. doi:10.1126/science.163.3863.150. PMID 5762760. Archived from the original (PDF) on 2017-11-17. Retrieved 2014-11-28.
  11. ^ Margulis, L (1971). "Whittaker's five kingdoms of organisms: minor revisions suggested by considerations of the origin of mitosis". Evolution. 25 (1): 242–245. doi:10.2307/2406516. JSTOR 2406516. PMID 28562945.
  12. ^ Delwiche, Charles F.; Timme, Ruth E. (2011-06-07). "Plants". Current Biology. 21 (11): R417–R422. Bibcode:2011CBio...21.R417D. doi:10.1016/j.cub.2011.04.021. ISSN 0960-9822. PMID 21640897. S2CID 235312105.
  13. ^ Cite error: The named reference Puttick-2018 was invoked but never defined (see the help page).
  14. ^ Gerrienne, Philippe; Gonez, Paul (January 2011). "Early evolution of life cycles in embryophytes: A focus on the fossil evidence of gametophyte/sporophyte size and morphological complexity". Journal of Systematics and Evolution. 49 (1): 1–16. doi:10.1111/j.1759-6831.2010.00096.x. hdl:2268/101745. S2CID 29795245.

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