Pharmacognosy I Lab4 PDF

NewMansoura University Faculty of Pharmacy PharmDProgram ______________________________________________ Pharmacognosy I (PPC101) Section.4  Botany and Medicinal Plants(PPC101) Section No.4 The Permanent tissues Pe...

NewMansoura University Faculty of Pharmacy PharmDProgram ______________________________________________ Pharmacognosy I (PPC101) Section.4  Botany and Medicinal Plants(PPC101) Section No.4 The Permanent tissues Permanent tissues may be classified according to their function, structure and position in the plant body. They may be pictured as composed of four systems of tissues; 1- dermal, 2- vascular, 3- ground 4- secretory. Botany and Medicinal Plants(PPC101) Section No.4 Major tissue types of Vascular Plants  Botany and Medicinal Plants(PPC101) Section No.4 Dermal tissues appendages 1- stomata 2- Trichomes (hairs)  Botany and Medicinal Plants(PPC101) Section No.4 Trichomes Non glandular Glandular Branched Unbranched Stellate Candelabra Unicellular Multicellular Multicelluar uniseriate biseriate hibiscus rosemary Senna Calendula  Botany and Medicinal Plants(PPC101) Section No.4 Non glandular Trichomes Uniseriate multicellular non-glandular trichome Biseriate multicellular Unicellular non-glandular non-glandular trichome Botany and Medicinal Plants(PPC101) Section No.4 Non glandular Trichomes Candelabra trichome Stellate Candelabra Botany and Medicinal Plants(PPC101) Section No.4 Applications on Non glandular trichomes  Botany and Medicinal Plants(PPC101) Section No.4 Trichomes Non glandular Glandular Branched Unicellular stalk, Unicellular stalk, Multicellular glandular Unicellular stalk, unicellular head multicellular stalk, trichome bicellular head (Capitate) head unicellular (Bicapitate) head hyoscyamus mentha Labiaceous digitalis in menthe and clavate as in hyoscyamus F. solanaceae  Botany and Medicinal Plants(PPC101) Section No.4 Glandular Trichomes Capitate tr Bicapitate tr Clavate trichome Unicellular stalk, multicellular head glandular trichome Unicellular stalk, Unicellular stalk, unicellular head bicellular head in hyoscyamus glandular trichome glandular trichome  Botany and Medicinal Plants(PPC101) Section No.4 Glandular Trichomes Labiaceous trichome as in Mentha unicellular short stalk and multicellular head (8 club-shaped cells) gland and detached cuticle Surface view Side view  Botany and Medicinal Plants(PPC101) Section No.4 Glandular Trichomes Branched glandular trichome Uniseriate multicellular stalke Unicellular head glandular trichome Multiserriate, Multicellular stalk, multicellular head glandular trichome Botany and Medicinal Plants(PPC101) Section No.4 Applications on glandular trichomes  Botany and Medicinal Plants(PPC101) Section No.4 Ground or Fundamental tissues The most important type of these tissues are the: 1- parenchyma, 2- collenchymas, and 3- sclerenchyma.  Botany and Medicinal Plants(PPC101) Section No.4  living cells, having a large vacuole and thin wall.  Isodiametric or elongated.  Retain their ability to divide.  Large intercellular space.  Storage of water and food.  Photosynthesis (chlorenchyma).  can have very large.  intercellular space (aerenchyma). Botany and Medicinal Plants(PPC101) Section No.4 Large cells Intercellular Thin walls spaces  Botany and Medicinal Plants(PPC101) Section No.4 Parenchyma having chloroplast to do the photosynthesis Palisade cells Spongy tissues  Botany and Medicinal Plants(PPC101) Section No.4 Cells having in between large air spaces present in some aquatic plants to keep up the buoyancy of these plants and also to facilitate the exchange of gases. Cells Air space  Botany and Medicinal Plants(PPC101) Section No.4  Living cells.  More elongated and narrower than parenchyma.  For stretching power and Supporting tissue.  Cellulosic walls of irregular thickness.  Thickness on corners (angular).  With intercellular space (lacunar).  Botany and Medicinal Plants(PPC101) Section No.4 No intercellular spaces Small cells Thick walls angle shape thickness between cells  Botany and Medicinal Plants(PPC101) Section No.4 The cells are arranged in tangential rows, the lumen appears almost circular due to massive thickening, and the thickening material chiefly deposited on the tangential walls.  Botany and Medicinal Plants(PPC101) Section No.4  Non living cells  Often lignified  For support sclerenchyma Sclerides Fibers  Botany and Medicinal Plants(PPC101) Section No.4 There are considered an lignified elements i.e give with ph/HCL (red colour) + ph/HCL Botany and Medicinal Plants(PPC101) Section No.4 Pharmacognosy I (PPC101) Section No.4