Plant Structures and Growth BIOL 1407. Root System Environment: Soil Functions: –Anchorage –Absorbs water and minerals –Transport Photo Credit: Rasbak.

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Presentation transcript:

Plant Structures and Growth BIOL 1407

Root System Environment: Soil Functions: –Anchorage –Absorbs water and minerals –Transport Photo Credit: Rasbak van TeunSpaans, Wikimedia Commons

Root Hairs Close to tip of root Extensions of epidermal cells ↑ surface area ↑ absorption

Shoot System Environment: Atmosphere Functions: –Photosynthesis –Transport –Support –Reproduction Photo Credit: Doyle Cross, El Yunque Cloud Forest, Puerto Rico 2007

Shoot System Organs: –Stems –Leaves –Flowers Photo Credit: Joseph Amana, Biology Student, Lady Bird Johnson Wildflower Center 2005

Growth Indeterminate growth  Grow throughout life Primary growth Secondary growth

Meristems Growth Zones Apical Meristems –At tips of roots & shoots –Primary Growth

Meristems Lateral Meristems –Only in woody plants –Cylinder in mature roots and stems –Secondary Growth Wood Bark

Root Tip

Dicot Root X-Sec

Stele of Dicot Root

Shoot Tip

Dicot Stem X-Sec

Dicot Leaf X-Sec

Lower Epidermis of Leaf

Vascular Tissue Xylem –Water –Minerals Phloem –Organic compounds

Xylem

Phloem

Plant Videos VA8to&feature=relatedhttp:// VA8to&feature=related Carnivorous Plants:

The End Unless otherwise specified, all images in this presentation came from: Campbell, et al Biology, 8 th ed. Pearson Benjamin Cummings.

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