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Unformatted text preview: Meristems, Tissues meristems - determines how the plant body develops after germination acts like stem cells in animals divides >> 1 meristematic cell, 1 cell able to differentiate apical meristems- elongates roots/shoots o located at tips of stems/roots, behind root cap o produces primary growth, primary tissues (xylem/phloem) o constantly divides >> adds cells to tips of plant body >> size lengthens o root cap cells, epicotyl/hypocotyls protect root/shoot meristems o primary meristems- protoderm (epidermis), procambium (vascular tissues), ground meristem (ground tissue) lateral meristems- peripheral cylinders of meristematic tissue, increases girth o produces secondary growth (sometimes not found in herbaceous, fleshy plants) o secondary growth >> treelike plants o 2 lateral meristems in woody plants - cork cambium (produces cork in outer bark), vascular cambium (produces secondary vascular tissue, between xylem/phloem) o secondary tissues - secondary xylem (main wood component), secondary phloem (near outer surface) plant body organization - 4 types...
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- Fall '10