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

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

5. A paradermal section Reticulated venation Major vein 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 Modified leaf 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 3 2 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

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

16. Leaf gap
Leaf gap
Leaf trace
Branch trace
xylem

17. LS of root Endogenous Vascular cylinder Root hairs (trichoblasts)
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 Tetrads of microspores Anther Microspore
Callose wall
Locule
(40x)
(20x)
Tetrads of microspores
Anther

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

25. references
USDA website. 04/28/06. <
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.