Bio 101 Plant AnatomyEx. 2-5 Post lab discussion<br />
Meristems<br />Based on location<br />Apical meristem<br />Lateral Meristem<br />Based on origin<br />Primary meristems<br...
Root apex vs. Shoot apex<br />Root apex –bidirectional (root cap and towards the axis)<br />SUBTERMINAL<br />No lateral ap...
Fundamental Tissues<br />Parenchyma<br />Collenchyma<br />Sclerenchyma<br />
Parenchyma<br />P-walls only; except for parenchyma found in secondary xylem<br />Living<br />Intercellular spaces<br />
Collenchyma<br />Angular<br />Lamellar<br />Lacunar<br />
Sclerenchyma<br />Differentiate:<br />Sclereids<br />Fibers<br />FIBERS:<br />a. Xylaryfibers—<br />1. libriform(absent in...
Extra xylary fibers<br />Monocot: bundle sheath<br />Climbing dicots: cortical layer; pericyclic fibers<br />
Sclereids<br />brachysclereids– phloem, cortex and bark of stems<br />---flesh of fruits of pear<br />Macrosclereids– test...
Parenchyma Origins<br />Ground meristem<br />Procambium<br />Phellogen<br />Vascular cambium<br />
Collenchyma origins<br />Ground meristem<br />Procambium<br />
Sclerenchyma origins<br />Sclereid<br />Parenchyma (sclerosis)—protoderm, procambium, or cambium, ground merisetm<br />Fib...
Conducting Tissues<br />XYLEM<br />Vessels<br />Tracheids<br />Fibers (libriform and fiber-tracheid)<br />Parenchyma– ray ...
Vessel orTracheid?<br />Imperforated<br />Tapering ends<br />Short and drum-like<br />Arranged end to end<br />Overlapping...
Perforation (vessels)<br />Simple<br />Multiple<br />Scalariform<br />Reticulate<br />foraminate<br />
Secondary wall pattern <br />Tracheids and vessel elements<br />Protoxylem – annular or helical<br />Metaxylem– scalarifor...
Annular– helical– scalariform—reticulate--pitted<br />
Phloem <br />Sieve tube elements<br />-- arranged end to end<br />-- enucleate<br />-- with specialized depressions at the...
Sieve plate<br />Simple<br />Compound <br />
Origins, Topography<br />Vessel<br />Tracheid<br />Sieve tube<br />Companion cell<br />Sieve cell<br />
Advantages <br />Helical or annular tracheids?<br />
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Bio101plantanatomyex2 5postlab-091210042920-phpapp02 (1) (1) (1)

  1. 1. Bio 101 Plant AnatomyEx. 2-5 Post lab discussion<br />
  2. 2. Meristems<br />Based on location<br />Apical meristem<br />Lateral Meristem<br />Based on origin<br />Primary meristems<br />Secondary meristems<br />
  3. 3. Root apex vs. Shoot apex<br />Root apex –bidirectional (root cap and towards the axis)<br />SUBTERMINAL<br />No lateral appendages<br />No nodes and internodes<br />Branching initiated beyond <br />the region of most active growth<br />
  4. 4. Fundamental Tissues<br />Parenchyma<br />Collenchyma<br />Sclerenchyma<br />
  5. 5. Parenchyma<br />P-walls only; except for parenchyma found in secondary xylem<br />Living<br />Intercellular spaces<br />
  6. 6.
  7. 7. Collenchyma<br />Angular<br />Lamellar<br />Lacunar<br />
  8. 8. Sclerenchyma<br />Differentiate:<br />Sclereids<br />Fibers<br />FIBERS:<br />a. Xylaryfibers—<br />1. libriform(absent in gymno) 2. fiber-tracheid<br />b. Extraxylaryfibers– location?<br />
  9. 9.
  10. 10. Extra xylary fibers<br />Monocot: bundle sheath<br />Climbing dicots: cortical layer; pericyclic fibers<br />
  11. 11.
  12. 12. Sclereids<br />brachysclereids– phloem, cortex and bark of stems<br />---flesh of fruits of pear<br />Macrosclereids– testa of seeds of legumes<br />Osteosclereids– seeds and leaves of dicots<br />Astrosclereids--leaves<br />
  13. 13. Parenchyma Origins<br />Ground meristem<br />Procambium<br />Phellogen<br />Vascular cambium<br />
  14. 14. Collenchyma origins<br />Ground meristem<br />Procambium<br />
  15. 15. Sclerenchyma origins<br />Sclereid<br />Parenchyma (sclerosis)—protoderm, procambium, or cambium, ground merisetm<br />Fiber<br />Procambium<br />Cambium<br />Ground meristem<br />
  16. 16. Conducting Tissues<br />XYLEM<br />Vessels<br />Tracheids<br />Fibers (libriform and fiber-tracheid)<br />Parenchyma– ray parenchyma and axial parenchyma<br />PHLOEM<br />Sieve tube or sieve cells<br />Companion cells or albuminous cells<br />Fibers (bast fibers)<br />parenchyma<br />
  17. 17. Vessel orTracheid?<br />Imperforated<br />Tapering ends<br />Short and drum-like<br />Arranged end to end<br />Overlapping<br />
  18. 18. Perforation (vessels)<br />Simple<br />Multiple<br />Scalariform<br />Reticulate<br />foraminate<br />
  19. 19. Secondary wall pattern <br />Tracheids and vessel elements<br />Protoxylem – annular or helical<br />Metaxylem– scalariform; reticulate; pitted<br />
  20. 20.
  21. 21. Annular– helical– scalariform—reticulate--pitted<br />
  22. 22. Phloem <br />Sieve tube elements<br />-- arranged end to end<br />-- enucleate<br />-- with specialized depressions at their end wall (sieve areas)<br />---sieve plates (end wall)<br />
  23. 23. Sieve plate<br />Simple<br />Compound <br />
  24. 24.
  25. 25. Origins, Topography<br />Vessel<br />Tracheid<br />Sieve tube<br />Companion cell<br />Sieve cell<br />
  26. 26. Advantages <br />Helical or annular tracheids?<br />

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