Plant Transport

-Wrapping it up Activity Agenda: -Bell Ringer -Transport Notes -Wrapping it up Activity -Exit Slip Bell Ringer Gymnosperm or Angiosperm? This plant has a finite growing season and the seeds are encased in tissue. This plant will stay green year around and has “naked seeds”. Monocot and Dicot are the two types of the seed plant. MINI TEST next class!!

copyright cmassengale Taxonomy Plants are divided into two groups Based on the presence or absence of an internal transport system for water and dissolved materials Vascular vs. Nonvascular Vascular Bundles copyright cmassengale

Nonvascular Plants Do not have vascular tissue for support or conduction of materials Called Bryophytes Require a constantly moist environment Sporophyte stage Gametophyte Stage Moss Gametophytes & Sporophytes copyright cmassengale

copyright cmassengale Nonvascular Plants Plants can’t grow as tall Cells must be in direct contact with moisture Materials move by diffusion cell-to-cell Sperm must swim to egg through water droplets copyright cmassengale

copyright cmassengale Nonvascular Plants Includes mosses (Bryophyta), liverworts (Hepatophyta), and hornworts (Antherophyta) Liverworts Hornworts copyright cmassengale

copyright cmassengale Vascular Plants Also called Tracheophytes Subdivided into two groups -- Seedless vascular plants and Seed-bearing vascular plants (Angiosperms and Gymnosperms) Club Moss copyright cmassengale

copyright cmassengale Vascular System Xylem tissue carries water and minerals upward from the roots Phloem tissue carries sugars made by photosynthesis from the leaves to where they will be stored or used Sap is the fluid carried inside the xylem or phloem copyright cmassengale

Vascular Tissue of Root Plays a key role in water and mineral transport. Root hair provide large surface area for uptake. This is where most water and minerals are absorbed. copyright cmassengale

Vascular Tissue in Stem Monocots- vascular bundles are scattered thoughout the stem. Dicots- vascular bundles are in a cylinder. copyright cmassengale

Vascular Tissue in Leaf Photosynthesis! Because water also evaporates from surfaces and lost to atmosphere Transpiration occurs! Lost water is drawn in through xylem vessels. Gas exchange also occurs here. When plants give off O2 they open stomata, but then close again so that too much water loss does not occur. They keep them open long enough for photosynthesis to occur. copyright cmassengale

copyright cmassengale Transport in Plants Water Transport The combination of root pressure, capillary action, and transpiration provides enough force to move water though xylem even in the tallest plants. Capillary action- cohesion + adhesion (water molecules stick together) copyright cmassengale

copyright cmassengale Transport in Plants Nutrient Transport Nutrients are pushed though phloem. This process moves sugars from sources to a sink. Sources are where sugar is produced, sinks is a cell where sugar is used or stored. As nutrients move, this changes concentration levels and changes movement in fluid. As a result- phloem is about to move nutrients any where it is needed. copyright cmassengale

copyright cmassengale

So putting it all together… http://highered.mheducation.com/sites/9834092339/student_view0/chapter38/animation_-_phloem_loading.html

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