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Anatomy of Pisum Sativum (garden pea)

Anatomy of Pisum Sativum (garden pea). by Wannasiri Wannarat. Characters of Pisum sativum. Kingdom   Plantae Class   Magnoliopsida Order   Fabales Family   Fabaceae Genus   Pisum L. Species   Pisum sativum L. -- garden pea  (USDA website,2006)  

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Anatomy of Pisum Sativum (garden pea)

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  1. Anatomy of Pisum Sativum (garden pea) by Wannasiri Wannarat

  2. Characters of Pisum sativum Kingdom  Plantae Class  Magnoliopsida Order  Fabales Family  Fabaceae Genus  Pisum L. Species  Pisumsativum L. -- garden pea (USDA website,2006)   • Angiosperm (Dicot plant) • Annual plant (cultivation during cool season) • edible seeds • a climbing stem which grows as tall as 6 feet • self-fertilization (female and male are from the same flower)

  3. Leaves Tendrils Guard cell Pinnately Compound Stipules (leaflike appendages)

  4. An epidermal section Guard cell No Subsidiary cells (Anomacytic ) Stomata (20x) stomatal complexes

  5. A paradermal section Major vein Reticulated venation Mid vein Minor vein Palisade parenchyma Guard cell (60x) Plastids (4x)

  6. XS of blade Bifacial leaf Upper epidermis Tracheary element Palisade parenchyma Spongy parenchyma Lower epidermis (40x)

  7. XS of Mid vein Upper epidermis Fibers Xylem Phloem Fibers (20x) Lower epidermis (60x)

  8. XS of tendril Xylem Phloem Fibers Epidermis Parenchyma cells Modified leaf (20x) Stomata (4x) Mesophyll cells (60x)

  9. XS of Stem Eustele ( lyzogenous pith) Epidermis Discrete vascular bundle Cortex (4x)

  10. Primary vascular tissue Discrete vascular bundle Interfasicular region Fascicular cambium Metaxylem Protoxylem Primary phloem (20x)

  11. XS of vascular bundle Opened collateral vascular bundle Endarch primary xylem pattern Epidermis Fibers Primary phloem Metaxylem Parenchyma cells Crushed protoxylem (20x)

  12. Primary phloem Fibers (40x) Metaxylem (60x) Companion cell Phloem Sieve cell

  13. LS vs. XS of stem Epidermis 4 4 1 2 3 3 2 4 1 (20x) Secondary wall thickening parenchyma (20x) Mesophyll cells 1=Protoxylem, 2=Metaxylem, 3=Promary phloem, 4= Fiber

  14. LS of primary xylem Metaxylem Protoxylem Pits Helical thickening ( 40x)

  15. Collenchyma tissue Collenchyma (40x) Angular (4x) Stomata (60x)

  16. Leaf gap Leaf gap Leaf trace Branch trace xylem

  17. LS of root Root primodia Endogenous Rhizodermis (4x) Vascular cylinder Cortex (20x) Root hairs (trichoblasts)

  18. Root primodium apical meristem Vascular cylinder Crushed endodermis Cortex Parenchyma Pericycle Primary xylem (20x)

  19. Branch root Root hairs Rhizoderm Cortex Vascular tissue (4x)

  20. Branch root (cont.) Fibers (10x) (20x) Metaxylem Primary phloem Vascular tissue (xylem) Curshed Protoxylem

  21. Primary state of root Primary xylem pattern : triarch (exdarch) (4x) Metaxylem Cortex Endodermis (40x) Protoxylem Pericycle Primary phloem

  22. Flower bud Anther (4x)

  23. Male reproduction Microspore Callose wall Locule (40x) (20x) Tetrads of microspores Anther

  24. Hydrothode ? Stoma xylem (40x) (4x)

  25. references • USDA website. 04/28/06. <http://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=PISA6&display=31> • Berg, L.R. (1997). Introductory Botany Plant, People & The environment (1st edition). Brooks/Cole-Thomson Learning, USA. • Raven, P.H., R.F.Evert, and S.E. Eichhorn. (2003). Biology of Plants (6th edition). W.H. Freeman and company, New York, USA. • Esau, K. (1976). Anatomy of seed plants (2nd edition). John Wiley & Son, Khundlli, India.

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