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![Page 1: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/1.jpg)
• Highlight or underline-
• New cells formed in the meristems of a plant are similar in appearance and function
• Some must remain meristematic
• Most mature and become other tissues
Plant Tissues
![Page 2: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/2.jpg)
• Highlight or underline- Tissues may be classified• I Meristems• II Permanent
– A Dermal- surface– B Ground
• Parenchyma• Collenchyma• Sclerenchyma
C Vascular• Xylem• Phloem
Plant Tissues
![Page 3: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/3.jpg)
• Highlight or underline-
• A simple tissue is composed of only one cell type.
• Complex tissues contain more than one cell type
Plant Tissues
![Page 4: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/4.jpg)
Meristematic Tissue
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Apical meristems are located at the tips of stems and roots.
The activity of these meristems results in an increase in plant length.
This is primary growth
The resulting tissues are called primary tissues
![Page 5: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/5.jpg)
Meristematic Tissue
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Lateral meristems are found near the periphery of stems and roots and are responsible for increase in diameter.
This is know as secondary growth and secondary tissues
![Page 6: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/6.jpg)
Questions 4a and b
Guard Cells Bean shaped
Others?
![Page 7: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/7.jpg)
Surface Tissues
Observe and answer questions 4 a and b.
![Page 8: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/8.jpg)
Observe and answer Question 5a and b
Other epidermal cells
![Page 9: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/9.jpg)
Questions 6 and 7
7. The guard cells regulate the size of stomata. As a result they control gas exchange and water loss
6. Protects against __?__ loss
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Question 8
Clue: how many kinds of cells are present?
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Figure 2.9 Lower Epidermis
Epidermal
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Periderm or cork
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Periderm replaces the epidermis on plants with active lateral meristems.
Cork cells fit tightly together and are dead at maturity.
![Page 13: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/13.jpg)
Simple Fundamental Tissue
Collenchyma
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Collenchyma is a simple tissue with irregularly thickened cell walls
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Collenchyma
Answer Question 9
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Parenchyma
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Parenchyma is the most common kind of simple tissue. It makes up the bulk of the herbaceous (non woody) plant body.
![Page 16: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/16.jpg)
Parenchyma
![Page 17: Highlight or underline- New cells formed in the meristems of a plant are similar in appearance and function Some must remain meristematic Most mature.](https://reader036.fdocuments.us/reader036/viewer/2022070409/56649e7c5503460f94b7e212/html5/thumbnails/17.jpg)
Sclerenchyma
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Sclerenchyma cells have thick secondary cell walls and are dead at maturity
In contrast to collenchyma has evenly thickened walls
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Sclerenchyma
Question 11
Very thick walls
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Sclerenchyma
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Sclerenchyma Fibers Figure 2.11
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Question 12
Sclerenchyma Parenchyma Collenchyma
Figure 2.12
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Important Note:
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Parenchyma, collenchyma and sclerenchyma are basic cell types that often form simple tissues. Frequent references will be made of these three tissues. Know their characteristics and main functions.