Chapter 32 and 33 - Plant Structure and Growth Know the...

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Plant Structure and Growth Know the difference between: herbaceous and woody plants annuals, biennials and perennials dicots and monocots deciduous and evergreens Understand the basic divisions of the plant body. Be able to list and explain the function of the three types of tissue systems that exist in the vascular plant.
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Plant Structure and Growth Understand the differences in the cell wall structure of the various types of tissue. Know the types of simple and complex tissues that make up these tissue systems and the role they play in allowing the tissue system to carry out its role. Be able to describe the structure and function of the two types of vascular tissues in plants. Be able to explain how plants grow and the difference between primary and secondary growth.
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Plants Over 300,000 varities Size Climate All have the same basic structure roots stems leaves
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Classifications Herbaceous: stems and leaves die back to the ground at the end of the season Vs. Woody: Aerial parts persist all year long (cell wall have lignin)
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Classifications Annuals: Biennials: Perennials: (all woody plants)
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Classifications (Trees) Deciduous: Vs. Evergreen:
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Classifications (Vascular System) Monocot: Vs. Eudicot :
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Classifications (Roots) Taproot: Vs. Fibrous:
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Plant Body Root System Vs. Shoot System Simple tissues Vs. Complex tissues
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Plant Tissue Systems Vascular Plants 3 tissue systems Each tissue system contains two or more kinds of tissues Ground tissue system Vascular tissue system Dermal tissue system Organs
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Ground Tissue System 3 Simple Tissues Parenchyma Collenchyma Sclerenchyma Plant cell walls Functions:
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Ground Tissue System (Parenchyma) Parenchyma cells Thin 1° cell walls Most common cell and tissue type Photosynthesis Storage Secretion Can differentiate into other cell types
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Ground Tissue System (Collenchyma) Collenchyma cells Uneven thick 1° cell walls Flexible Provides support in soft, non-woody organs Not found uniformly throughout the plant Occurs as long stands near stem surfaces and along leaf veins
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Ground Tissue System (Sclerenchyma) Sclerenchyma cells 1° and 2° cell walls Unable to stretch and Elongate Provide support for plant body (dead cells) Sclereids: variable shape cells found in shells of nuts or stones of fruit Fibers: long, tapered cells often found in patches or clumps in wood, inner bark, and leaf ribs
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Ground Tissue System Cell Wall Materials Cellulose: 40-60% of plant dry weight (glucose polymer) Hemicellulose (variable in composition) Pectin Lignin (2° cell wall) strengthening; derived from amino acids
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Ground Tissue System Cell Wall Composition Parenchyma: cellulose (predominantly),
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This note was uploaded on 12/07/2009 for the course BIO 101 taught by Professor Don during the Fall '09 term at Ivy Tech Community College.

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Chapter 32 and 33 - Plant Structure and Growth Know the...

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