Phloem Transport

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Cards (48)

  • Plants transport organic compounds from sources to sinks
  • Active transport is used to load organic compounds into phloem sieve tubes at the source
  • High concentrations of solutes in the phloem at the source lead to water uptake by osmosis
  • Incompressibility of water allows transport along hydrostatic pressure gradients
  • Raised hydrostatic pressure causes the contents of the phloem to flow towards sinks
  • Structure and function are correlated in the phloem of plants
  • What process does the phloem use to transport materials?
    active translocation
  • What does the phloem transport?
    food and other organic substances
  • Phloem occupy the outer portion of the vascular bundle and are composed of sieve tube elements and companion cells
  • Phloem vessel walls consists of cells that are connected at their transverse ends to form porous sieve plates
  • Vessels are composed of living tissue, however sieve tube elements lack nuclei and have few organelles
  • A storage organ is a part of a plant specifically modified to store energy or water
  • Examples of storage organs include bulbs, tubers, and storage roots
  • Hyphae are the tubular projections of multicellular fungi that form a filamentous network (mycelium)
  • Fungal hyphae release digestive enzymes in order to absorb nutrients from food sources
  • What is it called when certain species of fungi form a symbiotic relationship with plants whereby both species benefit?
    mutualism
  • What benefits do plants get from their relationship with fungi?
    Mineral transfer
  • What benefits do fungi get from their relationship with plants?
    Nutrient absorption