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Patterns of xylem development: xylem in brown; arrows show direction of development from protoxylem to metaxylem. Xylem development can be described by four terms: centrarch, exarch, endarch and mesarch. As it develops in young plants, its nature changes from protoxylem to metaxylem (i.e. from first xylem to after xylem). The patterns in which ...
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Title Director Cast Genre Notes Lúdas Matyi: Kálmán Nádasdy: Imre Soós, György Solthy, Erzsi Pártos, Teri Horváth: The first Hungarian film in color, Best male actor, Karlovy Vary Film Festival 1950
In a vascular plant, the stele is the central part of the root or stem [1] containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue and a pericycle, which, if present, defines the outermost boundary of the stele.
Magyar rekviem: Károly Makk: György Cserhalmi: Drama: Halálutak és angyalok: Zoltán Kamondi: Enikő Eszenyi: Drama: Screened at the 1991 Cannes Film Festival: A hetedik testvér: Jenő Koltai, Tibor Hernádi: Csongor Szalay (voice), Balázs Simonyi (voice), Álmos Elõd (voice) Animated fantasy-comedy-drama: Szerelmes szívek: György ...
English: xylem (blue) carries water from the roots upwards phloem (orange) carries products of photosynthesis from the place of their origin (source) to organs where they are needed (roots, storage organs, flowers, fruits – sink); note that e.g. the storage organs may be source and leaves may be sink at the beginning of the growing season
A pteridophyte is a vascular plant (with xylem and phloem) that reproduces by means of spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. They are also the ancestors of the plants we see today.
This is incorrect. Most clades of xylem-bearing plants lack vessel elements. The defining feature of xylem in recent cladistic and morphological literature seems to be the presence of the compound lignin, not a cell type. In fact, some of the "xylem" in the Silurian rhyniophytes has been found not to be true xylem, despite the structure of the ...