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Cucumis Sativus L. Nick Lorenz May 1, 2006. Phylogeny. Interesting Facts. Cucumbers originated in India where they have been cultivated for 3000 years. Introduced to the New World by Columbus. Pollinated by bees - PowerPoint PPT Presentation
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Cucumis Sativus L.Cucumis Sativus L.
Nick LorenzNick Lorenz
May 1, 2006May 1, 2006
PhylogenyPhylogeny Genus Cucumis L.
Gourd Family Cucurbitaceae
Related to Squash, Melons, Pumpkins
Interesting FactsInteresting Facts Cucumbers originated in India where they have been Cucumbers originated in India where they have been
cultivated for 3000 years.cultivated for 3000 years. Introduced to the New World by Columbus.Introduced to the New World by Columbus. Pollinated by bees Pollinated by bees Cucumbers contain 5 calories per ounce and only very Cucumbers contain 5 calories per ounce and only very
small amounts of nutrientssmall amounts of nutrients Three different flower types --- staminate (male), Three different flower types --- staminate (male),
pistilate (female) and hermaphrodite (both male and pistilate (female) and hermaphrodite (both male and female).female).
FlowersFlowersMale Staminate --->Male Staminate --->
Female Pistilate Female Pistilate (below and right)(below and right)
Ovary
Pollen
Sepal
Fruit AnatomyFruit Anatomy
Parietal Parietal PepoPepo Inferior OvaryInferior Ovary Hard to distinguish Hard to distinguish
endocarpendocarp
Ovule
Placenta
Ovules r.s.
Apical MeristemApical MeristemTunica-CorpusTunica-CorpusFlower DevelopmentFlower Development
Flowering Buds
Leaf Primordial
Tunica
Corpus
Leaf MorphologyLeaf MorphologyDicotDicotBifacialBifacialPalmate (major) and Palmate (major) and
Reticulate (minor) Reticulate (minor) venationvenation
Dicot Dicot VenationVenation
Leaf Venation Major Vein
Minor Vein
Major Vein
Petiole and Leaf GapPetiole and Leaf Gap
Petiole x.s.Leaf Trace
Leaf Gap
Vascular Bundles missing
StomataStomata
Paracytic Paracytic with different subsidiary cells
Trichome CityTrichome City
Stinging -LeafShort Multicellular Uniseriate- Stem
Glandular Capitate -Leaf Long Multicellular Uniseriate- Stem
Stem Vascular Stem Vascular MorphologyMorphology
Open Open Bicollateral Bicollateral AmphicribralAmphicribralSclerificationSclerification
Secondary Growth of Vascular Bundles (x.s. 4x with Toluidine Blue)
Stem VascularStem VascularSecondary Phloem
Metaxylem
Protoxylem
Primary Phloem
Vascular Cambium
Epidermis and TissuesEpidermis and Tissues
Angular Collenchyma
Epidermis
Reticulate Metaxylem
Helical protoxylem not shownSieve Elements with callose
Large Parenchyma
Root SystemRoot SystemFiberous RootsFiberous Roots
TriarchTriarch
Lateral Root Phloem
Endodermis
Rhizodermis
XylemEpidermis
RootRoot
Exarch Development
Later Secondary Growth
Vascular Cambium
Cortex
Secondary Growth with Phelloderm
Phellogen in StemPhellogen in StemMultiple Phellem Multiple Phellem
layerslayersSuberinSuberinTissues outside Tissues outside
phellem our lostphellem our lost
Thank youThank you