Transcript Datura Leaf
Gross Anatomical study of Crude Drugs Datura Leaf Gross Anatomical study of Crude Drugs Datura Leaf Objectives On completion of this period you would be able to know the • Biological source • Histology • Constituents and • Uses of Datura Can You Identify this Plant? Fig:1 1. Can we use this plant as medicinal plant? Ans: Yes/ No 2. Which part of the plant is used as a medicinal agent? Ans: Flowering tops and leaves 3. How do you confirm that this plant is Datura? Ans: By leaves , flowers and fruits 4. Are there any other methods to confirm the genuinity of crude drug? Ans: Yes . By histological study Datura Biological source : Dried leaves and flowering tops of Datura metel Family : Solanaceae A transverse section of Datura leaf shows Upper Epidermis Mesophyll Lower Epidermis Fig :3 Lamina : Dorsiventral Upper Epidermis : • Straight walls • 600 to 1100 cells/ sq.mm • Single layered • rectangular Fig :4 Stomata : Cruciferous or anisocytic (unequal celled) Fig :5 Trichomes : Covering Trichomes Uniseriate Multicellular Warty Blunt tip Glandular Trichomes Unicellular stalk Head 2-4 celled Fig : 6 Mesophyll Palisade : • Single layered • compact cells • radially elongated • covering 2/5 th of the lamina Fig : 7 Spongy Parenchyma • 6 – 8 layers • Loosely arranged • intercellular spaces • cluster crystals • Microspheroid al crystals • Vascular strands Fig : 8 Lower Epidermis : • Cuticle • Wavy walls 700 – 1250 cells / sq.mm • Single layered • Rectangular • Stomata • Numerous trichomes Fig : 9 Midrib Continuous epidermal cells & presence of Collenchyma at • below upper epidermis • above lower epidermis having thick walled cellulosic cells Fig : 10 Cortical Parenchyma contains • Prisms of calcium oxalate • Microsphenoidal crystals Vascular Bundle • Xylem : Lignified • Phloem: Nonlignified Fig : 11 Chemical constituents Tropane Alkaloids namely • Scopolamine (hyoscine) • Hyocyamine • Atropine Uses • Parasympatholytic • CNS depressant • Mydriatic • Antispasmodic • Gastric and duodenal ulcers QUIZ 1. Which type of stomata present in Datura? Ans: Cruciferous or Anisocytic stomata 2. Whether the palisade parenchyma continuously arranged or not ? Ans: Yes 3. What type of trichomes are present in Datura leaf? Ans: Covering & glandular trichomes 4. Collenchyma is present at--------&--------region Ans: Below upper & above lower epidermis Questions 1. Describe in detail about the histology of Datura leaf with a neat labelled diagram. 2. Write the Botanical source, family, constituents and uses of Datura leaf Thank you