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Cucumis Sativus L.

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

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Cucumis Sativus L.

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  1. Cucumis Sativus L. Nick Lorenz May 1, 2006

  2. Phylogeny

  3. Interesting Facts • Cucumbers originated in India where they have been cultivated for 3000 years. • Introduced to the New World by Columbus. • Pollinated by bees • Cucumbers contain 5 calories per ounce and only very small amounts of nutrients • Three different flower types --- staminate (male), pistilate (female) and hermaphrodite (both male and female).

  4. Flowers • Male Staminate ---> • Female Pistilate (below and right) Pollen Ovary Sepal

  5. Fruit Anatomy Ovule Placenta • Parietal • Pepo • Inferior Ovary • Hard to distinguish endocarp Ovules r.s.

  6. Apical Meristem • Tunica-Corpus • Flower Development Leaf Primordial Flowering Buds Tunica Corpus

  7. Leaf Morphology • Dicot • Bifacial • Palmate (major) and Reticulate (minor) venation

  8. Dicot Venation Major Vein Minor Vein Major Vein Leaf Venation

  9. Petiole and Leaf Gap Vascular Bundles missing Leaf Gap Leaf Trace Petiole x.s.

  10. Stomata Paracytic with different subsidiary cells Paracytic

  11. Trichome City Long Multicellular Uniseriate- Stem Glandular Capitate -Leaf Short Multicellular Uniseriate- Stem Stinging -Leaf

  12. Stem Vascular Morphology • Open • Bicollateral • Amphicribral • Sclerification Secondary Growth of Vascular Bundles (x.s. 4x with Toluidine Blue)

  13. Stem Vascular Secondary Phloem Vascular Cambium Metaxylem Primary Phloem Protoxylem

  14. Epidermis and Tissues Epidermis Reticulate Metaxylem Helical protoxylem not shown Sieve Elements with callose Large Parenchyma Angular Collenchyma

  15. Root System • Fiberous Roots • Triarch Xylem Epidermis Endodermis Rhizodermis Lateral Root Phloem

  16. Root Vascular Cambium Cortex Later Secondary Growth Secondary Growth with Phelloderm Exarch Development

  17. Phellogen in Stem • Multiple Phellem layers • Suberin • Tissues outside phellem our lost

  18. Thank you

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