BIO220H1 Study Guide - Casparian Strip, Lycopodiopsida, Suberin
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BIO220H1 Full Course Notes
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Document Summary
Tracheophytes [gr. trakhoia: tube + phyton: plant]: those plants with xylem and phloem, including psilophytes, club mosses, horsetails, ferns, gymnosperms, and angiosperms. Nontracheophytes: those plants lacking well-developed vascular tissue; the liverworts, hornworts, and mosses. Gymnosperm (jim no sperm) [gr. gymnos: naked + sperma: seed]: a plant, such as a pine or other conifer, whose seeds do not develop within an ovary (hence, the seeds are naked). Angiosperm (an jee oh spurm) [gr. angion: vessel + sperma: seed]: one of the flowering plants; literally, one whose seed is carried in a vessel (i. e. , fruit). Middle lamella: a layer of polysaccharides that separates plant cells; a shared middle lamella lies outside the primary walls of the two cells. Primary wall: cellulose-rich cell wall layers laid down by a growing plant cell. Secondary wall: wall layers laid down by a plant cell that has ceased growing; often impregnated with lignin or suberin.
