1 / 10

Transpiration Lab

Transpiration Lab. Transpiration. Drives movement of water through a plant Enters through the root hairs, passes through the xylem, up into the leaves, and out through stomata Transpiration = evaporation of water from the leaves

ranae
Download Presentation

Transpiration Lab

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Transpiration Lab

  2. Transpiration • Drives movement of water through a plant • Enters through the root hairs, passes through the xylem, up into the leaves, and out through stomata • Transpiration = evaporation of water from the leaves • Hydrogen bonding—weak interaction between hydrogen atom of one molecule and the oxygen atom of another molecule • You investigated factors that affect the rate of transpiration

  3. Stomata (singular: stoma) • Hundreds of stomata in the epidermis of a leaf • Most on lower surface • Receives less solar radiation • Allow carbon dioxide to enter

  4. Guard Cells • Guard cells surround each stoma • Regulate rate of transpiration by opening and closing • Fig. A—guard cells are turgid, stomatal opening is large • Fig B—guard cells are flaccid, stomal opening closes

  5. Photosynthesis • 6CO2 + 6H2O C6H12O6 + 6O2carbon + water glucose + oxygen dioxide (sugar) • Leaf needs carbon dioxide and water for photosynthesis • For carbon dioxide to enter, stomata must be open • However, plant must not lose too much water • Balance between conserving water and having enough CO2 for photosynthesis

  6. Factors That Affect the Rate of Transpiration • Light vs. dark • Humid vs. dry • Breezy vs. still air • Hot vs. warm

  7. Calculating Water Loss • Rate of transpiration is measured as the amount of water lost/sq. meter/minute

  8. Results

  9. Part 2: Stem Structure • Stems are specialized for storage, transport, and structural support

  10. Identify each of the structures • Choices for Tissue Type: xylem, phloem, parenchyma, epidermis • Choices for Function: food transport, water transport, food storage, protection

More Related