Chapter 32

Chapter 32 - Peridem Complex tissue Covers woody parts of...

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Chapter 32 (Plant Structure, Growth, and Differentiation) Root System Generally underground Obtains water and dissolved minerals for the plant Anchors the plant firmly in place. Shoot System Generally aerial Obtains sunlight Exchanges gases Co2, oxygen, water vapor Consists of A vertical stem that bears leaves (main organs of photosynthesis) Reproductive structures (flowers and fruits in flowering plants) Buds (undeveloped embryonic shoots) Develop on stems Vascular Tissue System Conducts materials throughout plant body Provides strength and support Xylem Complex tissue, conducts water and dissolved minerals. Conducting cells of cylem Tracheids Vessel elements Phloem Complex tissue, conducts sugar in solution Conducting cells of phloem Sieve tube elements Assisted by companion cells Dermal Tissue System Outer protective covering of plant body Epidermis Complex tissue Covers herbaceous plant body
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Unformatted text preview: Peridem Complex tissue Covers woody parts of plant body Epidermis Waxy cuticle redices water loss Secreted by epidermis covering aerieal parts Stomata permit gas exchange Between shoot system and atmosphere Trichomes (outgrowths or hairs) Many sizes, shapes, and functions. Growth in Plants Localized in specific regions (meristems) Unlike animals Involves 2 processes: Cell division Cell elongation Cell differentiation Primary Growth Increase in stem or root length Occurs in all plants Secondary Growth Increase in stem or root girth (thickness) In long cylinders of meristematic cells Throughout length of older stems and roots Apical Meristems Localized At tips of roots and shoots Within buds of stems Responsible for primary growth Two Lateral Meristems Responsible for secondary growth Vascular cambium Cork cambium...
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This note was uploaded on 02/29/2012 for the course BIO 123 taught by Professor Druger during the Spring '08 term at Syracuse.

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Chapter 32 - Peridem Complex tissue Covers woody parts of...

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