lecturenotes1 - Plant Structure Growth and Development...

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Plant Structure Growth and Development Chapter 35 Three Basic Plant Organs Roots Anchors a vascular plant Absorbs Minerals & Water Stores nutrients Stems Alternating system of nodes and internodes Axillary buds Terminal Bud Apical Dominance Leaves Main photosynthetic organ Blade & Petiole Monocot & Dicot vein patterns differ Three Tissue Systems Dermal Tissue Outer protective covering Epidermis in non-woody plants Periderm replaces epidermis in woody plants Vascular Tissue Plumbing Transports materials (water & nutrients)between roots and shoots Xylem: conveys water from roots to shoots Phloem: conveys organic nutrients from where they are made to where they are needed Ground Tissue The rest (everything that isn’t Dermal or Vascular Tissues) Pith is internal to the vascular tissue Cortex is external to the vascular tissue Ground tissue is often specialized in storage, photosynthesis and support
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Plant Structure Growth and Development Chapter 35 Common Types of Plant Cells Parenchyma Cells Thin & flexible primary walls Most lack secondary walls Protoplast has a large central vacuole “typical” plant cells – not very specialized Perform most metabolic functions including photosynthesis Generally retain the ability to differentiate into other types of plant cells Alive at functional maturity Collenchyma Cells Grouped in strands or cylinders Useful for supporting the young parts of the plant Unevenly thick primary cell walls and no secondary cell walls They are flexible Alive at functional maturity Scerenchyma Cells Also function in support
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This note was uploaded on 03/27/2012 for the course BIO 1442 taught by Professor Britton during the Spring '11 term at University of Florida.

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lecturenotes1 - Plant Structure Growth and Development...

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