9.2+Transport+in+angiospermophytes

9 Plant science - 9.1 Plant structure and growth - 9.2 Transport in angiospermophytes - 9.3 Reproduction in angiospermophytes - Plant science labs

9.2 Transport in angiospermophytes
Watch this youtube video and be amazed - Trees Are Freaking Amazing (download) media type="custom" key="24801616"
 * Starter **

Read this article from Scientific American about the importance of transpiration to the ecology of Amazonian rainforest. Discuss what you have learned in class.


 * Assessment statements** (IBO notes added to some point to clearly indicate what needs to be understood and what does not)
 * 9.2.1 || Outline how the root system provides a large surface area for mineral ion and water uptake by means of branching and root hairs. ||
 * 9.2.2 || List ways in which mineral ions in the soil move to the root. There are three processes: diffusion of mineral ions, fungal hyphae (mutualism), and mass flow of water in the soil carrying ions. ||
 * 9.2.3 || Explain the process of mineral ion absorption from the soil into roots by active transport. ||
 * 9.2.4 || State that terrestrial plants support themselves by means of thickened cellulose, cell turgor and lignified xylem. ||
 * 9.2.5 || Define transpiration. Transpiration is the loss of water vapour from the leaves and stems of plants. ||
 * 9.2.6 || Explain how water is carried by the transpiration stream, including the structure of xylem vessels, transpiration pull, cohesion, adhesion and evaporation. Limit the structure of xylem vessels to one type of primary xylem. ||
 * 9.2.7 || State that guard cells can regulate transpiration by opening and closing stomata. ||
 * 9.2.8 || State that the plant hormone abscisic acid causes the closing of stomata. ||
 * 9.2.9 || Explain how the abiotic factors light, temperature, wind and humidity, affect the rate of transpiration in a typical terrestrial plant. ||
 * 9.2.10 || Outline four adaptations of xerophytes that help to reduce transpiration. These could include: reduced leaves, rolled leaves, spines, deep roots, thickened waxy cuticle, reduced number of stomata, stomata in pits surrounded by hairs, water storage tissue, low growth form, CAM (crassulacean acid metabolism) and C4 physiology. ||
 * 9.2.11 || Outline the role of phloem in active translocation of sugars (sucrose) and amino acids from source (photosynthetic tissue and storage organs) to sink (fruits, seeds, roots). No detail of the mechanism of translocation or the structure of phloem is required. ||

Log in to the [|DCS Bridge]to obtain your workbooks and supporting resources. Word versions of workbooks available below for those unable to access the DCS Bridge. media type="custom" key="24801618"
 * Workbooks and Worksheets **

An alternative set of notes, which covers all of plant science, from [|i-Biology] can be found here. media type="custom" key="24801620"


 * Presentations and tutorials **

Steven Taylor ([|i-Biology]) has a great presentation to view and take notes from before starting your notebook. media type="custom" key="24801622"

This is a [|good summary] of plant transport from LeavingBio

Why does water move up a stem this [|pressure flow animation] from W H Freeman explains this in part

Use [|click4biology] to review and complete your notes


 * Activity Suggestions **


 * Use links and articles **