Cucurbita (Squash) Plant Anatomy James Craig

Red Warty Thing Strawberry BACKGROUND: Herbatious dicotyledon Appears to be one of the first domesticated species. The oldest remains have been found in Mexico, 8750 BC Brought to Europe in the 1500's by Spanish and French Explorers. Thousands of varieties of squash Blue Hubbard Chirimen Galeux d'Eysines Black Futsu Patisson Strie

Primary Vein Secondary Vein Tertiary Vein Leaf: Dorsiventral Net Venation pattern 2 layers of palisade cells Spongy Mesophyll Palisade Cells Vein Cotyledon

Adaxial Abaxial Stomata Cotyledon Leaf Peels Wavy/Crenulated Cells Stomata: Raised Anomocytic (no subsidiary cells)

Paradermal section Epidermis Palisade Cells

Open System Bicollateral Very small amount of 2ndary growth which is limited to the vascular bundle 2ndary Phloem occurs only in the external phloem Stem Vascular Bundle: 10X (Toluidine Blue-O) Internal Phloem Perivascular Fibers Parenchyma Xylem Darkly Stained Companion Cells External Phloem Vascular Cambium Stem 2ndary growth 10x

Angular Collenchyma Epidermis Perivascular Fibers Transverse Stem: 20X Toluidine Blue-O

Stem Longitudinal Section: 10x Sieve Plates Xylem Phloem Toluidine Blue-O Methylene Blue Sieve Plate anubis.ru.ac.za/virtualplant/anatomy/prac1a.htm

Stem To Root Transition: Toluidine Blue-O 4x 10x 4x 10x Pith cavity Tetrarch

Adventitious Root Vascular Vein Toluidine Blue-O 4x Root Hair Zone Differentiation Zone 4x

Root Cap Central Cylinder Cortex Quiescent Center Apical Initials 10x Wholemount Rhizodermis Protoderm

Apical Meristem 20X Leaf Primordia approximately 10 total Apical Meristem

Multicellular Uniseriate Trichomes Secretory Trichomes Stalked Capitate Head Capitate Head

Oil Droplet Pollen Grains 20x (Toluidine Blue-O) Apertures Exine

Flower Multicellular Uniseriate Trichomes (Toluidine Blue-O) Yellow/Orange Pigment 20x 10x

Cucurbitis Fruit Cross-section 4X (Toluidine Blue-O) Primary Vascular Bundles 20x Lenticel Periderm Filling Tissue Phellogen

Bibliography Exercise 1: the stem - variation in structure. anubis.ru.ac.za/virtualplant/anatomy/prac1a.htm Harvest Moon Farms & Seed Company. Cucurbitis. I. Agbagwa and B. Ndukwu. The value of morpho-anatomical features in the systematics of Cucurbita L. (Cucurbitaceae) species in Nigeria. African Journal of Biotechnology. Vol. 3 pp , October 2004 Katherine Esau. Plant Anatomy. John Wiley & Sons, Inc, New York Richard Crang & Andry Vassilyev. Plant Anatomy. McGraw Hill Companies Inc. 2003