Plant A&P Primary Tissue Systems Lecture 3

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15 Terms

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Parenchyma Tissue Characteristics

  • Can de/redifferentiate

  • Living protoplast

  • Thin walled

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Collenchyma Tissue Characteristics

  • Elongated w/ tapered ends

  • 1* wall only

  • Pectin & cellulose

  • Living

  • Just below epidermis

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Sclerenchyma Tissue Characteristics

  • Dead at maturity

  • 2* walls

  • No de/redifferentiation

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Function of Parenchyma Cells

Photosynthesis, Storage, Respiration, Regeneration

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Function of Collenchyma Cells

Support for HERBACEOUS plants (no 2* growth)

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Function of Sclerenchyma Cells

Support in plants that have ceased elongation, Economical importance (flax fibers for fabrics and ropes)

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Chlorenchyma

Specialized Parenchyma

  • Contain chloroplasts

<p>Specialized Parenchyma</p><ul><li><p>Contain chloroplasts</p></li></ul><p></p>
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Storage Parenchyma

Stores pigments

<p>Stores pigments</p>
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Transfer Cells

Specialized Parenchyma

  • Short distance transport

  • Associated w/ vascular tissues and conducting cells

<p>Specialized Parenchyma</p><ul><li><p>Short distance transport</p></li><li><p>Associated w/ vascular tissues and conducting cells</p></li></ul><p></p>
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Arenchyma

Specialized Parenchyma

  • Air cavities

  • Aquatic plants

  • Oxygen diffusion

<p>Specialized Parenchyma</p><ul><li><p>Air cavities</p></li><li><p>Aquatic plants</p></li><li><p>Oxygen diffusion</p></li></ul><p></p>
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Angular Collenchyma

Hemicellulose and ligning in angles between cells

<p>Hemicellulose and ligning in angles between cells</p>
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Lamellar Collenchyma

No intercellular space, compactly arranged, found in petiole of leaves

<p>No intercellular space, compactly arranged, found in petiole of leaves</p>
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Lacunar Collenchyma

Variation of angular type, spherical/oval cells, small intercellular spaces, in fruit walls

<p>Variation of angular type, spherical/oval cells, small intercellular spaces, in fruit walls</p>
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Fibers

Specialized Sclerenchyma

  • Elongated, thin

  • Generally thin

  • Supportive tissues

  • Xylem and Phloem fibers

<p>Specialized Sclerenchyma</p><ul><li><p>Elongated, thin</p></li><li><p>Generally thin</p></li><li><p>Supportive tissues</p></li><li><p>Xylem and Phloem fibers</p></li></ul><p></p>
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Sclereids

Specialized Sclerenchyma

  • Living or dead

  • No further growth

  • Support, Strength, Defense

  • Relatively short

<p>Specialized Sclerenchyma</p><ul><li><p>Living or dead</p></li><li><p>No further growth</p></li><li><p>Support, Strength, Defense</p></li><li><p>Relatively short</p></li></ul><p></p>