Anatomy of Pisum Sativum (garden pea)

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Presentation transcript:

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) 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)

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

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

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

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

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

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

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

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

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

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

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

LS of primary xylem Metaxylem Protoxylem Pits Helical thickening

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

Leaf gap Leaf gap Leaf trace Branch trace xylem

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

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

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

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

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

Flower bud Anther (4x)

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

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

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.