stems - STEMS I FUNCTIONS A Support leaves and reproductive...

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STEMS I. FUNCTIONS A. Support leaves and reproductive structures B. Produce carbohydrates C. Store materials D.Transport water and solutes between roots and leaves II. STRUCTURE OF PRIMARY STEMS A.Gross anatomy (node, internode, leaf (leaf scar), axillary buds (bud scales), terminal buds (bud scale scars) lenticels 1. Drawing of stem 1
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B. Internal anatomy ( see sectional diagrams ) 1. Apical meristem a) Step meristem (like root) b) Tunica - Corpus Model (1) Peripheral Meristems (2) Pith meristem c) Produces three primary meristems 2
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(1) Protoderm (2) Procambiam (3) Ground meristem d) Axillary buds and apical dominance 2. Primary stem comprised of three basic tissues a) Epidermis from protoderm via tunica (1) Usually one cell thick (2) Often have trichomes (3) Stomata 3
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(4) Cuticle b) Vascular form procambiam via peripheral meristem (1) Xylem and phloem occur in vascular bundles (2) Phloem forms before xylem (3) Xylem differentiates on inside of bundle (a) Endarch pattern (4) Undifferentiated cells between xylem and phloem remain
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stems - STEMS I FUNCTIONS A Support leaves and reproductive...

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