PPT-Plant transport: Xylem and Phloem

Chapter 4 pp 47 54 Lecture Outline Evolution of vascular tissue The xylem transports water and nutrients The phloem transports sugars and other organic compounds Xylem and phloem structure and function. Exploring Leaf Longevity. Martha Carlson, PhD candidate. NRESS, UNH, 2012. Twig, 2 Buds, 2 Petioles. The petiole of each leaf cups forming buds that will open next spring. Notice the soft hairy . trichomes. suspension-feeder: . there are rows of projections called . lamellae . on the bill.. “…when the mouth is closed, the large upper bill completely covers the lower …and when the mouth is slightly ajar, the adjacent lamellae of the upper and lower bills can act together as a sieve.” They must interdigitate. The tongue (hydrostat, blood) powers this filter via . Types of stems. Either woody or nonwoody. Generally, adapted to support leaves; also transport materials and provide storage. . -stolons – grow along soil surface and produce new plants (strawberry). 3 Systems of Plants we will study. Root system. Stem system. Leaf system. Main Functions of the Root system. 1. . . Anchorage and support.. The plant root system anchors the plant in the soil and provides physical support. . . (64 cells). Tube-like structure. (64 cells). Flattened structure. (64 cells). Surface area . . 420,000 . . m. 2. (168 cell surfaces . . 2500 . . m. 2. /cell. surface). Surface area/volume . Learning intentions. Develop microscope skills. Remove xylem from celery and prepare a microscope slide. Identify the lignin rings that strengthen xylem vessels. List the substances transported in the xylem. 2006-2007 Plant Anatomy Basic plant anatomy 1 root root tip root hairs Roots Roots anchor plant in soil, absorb minerals & water, & store food fibrous roots (1) mat of thin roots that spread out 1. Overview of Transport in a Vascular Plant. 2. TERMS TO BE REVIEWED. 1. passive transport 10. chemiosmosis. 2. transport proteins 11. proton pump. 3. active transport 12. membrane potential. Rahman. Associate Professor. J. N. College, Boko. Permanent Tissues. The Permanent tissues develop from apical meristem. They lose the power of cell division either permanently or temporarily.. They are classified into two types:. . Single layer of compactly arranged cell. Unicellular root hairs develop by some of these cells.. Cortex. . Major part of the root is occupied by several layers of parenchyma.. It is a protective tissue.. Epidermis. It consist of uniseriate, tangentially elongated cells.. The cells are living, achlorophylous and . vacuolate. The outer walls of the epidermal cells have cuticle to check water loss. Numerous multicellular hairs develop on the epidermis. In. . boerhaaviA (dicot) . Dracaena (monocot) . Secondary growth. Secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots thickning. . TDC 2. ND. SEMESTER. Definition of Stele and . Stelar. System. :. According to the earlier botanists, the vascular bundle is the fundamental unit in the vascular system of . pteridophytes. and higher plants. Van . DIAGRAMS OF PARTS OF THE PLANT. XYLEM TISSUE. Form a continuous system for the transport of water and minerals in one direction. They consist of:. dead lignified tracheids. vessels. supporting fibres.