Stoma on the leaf of a tomato plant
Image
Photo:
Leaf of a tomato plant – macroscopically and microscopically.
Type of media:
Image (421.9 kByte)
Last update:
2018-10-26
License:
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
This medium is made available under a CC BY-SA 4.0 international license.
What does this mean?
How to reference this medium
Media package:
Description:
Evaporation is vital for plants.
Its leaves are covered on all surfaces by epidermal cells, which are protected by a layer of wax (cuticle) on the outside, making it hard for water vapor (as well as for oxygen and CO2) to permeate the surfaces. Gas is exchanged with the environment through stomata. These stomata consist of two bean-shaped guard cells, which regulate the gas exchange of the leaf and thus can also control the evaporation rate in the range of two orders of magnitude.
Information and ideas:
The microscopic photo originates from an electron microscope.
Its leaves are covered on all surfaces by epidermal cells, which are protected by a layer of wax (cuticle) on the outside, making it hard for water vapor (as well as for oxygen and CO2) to permeate the surfaces. Gas is exchanged with the environment through stomata. These stomata consist of two bean-shaped guard cells, which regulate the gas exchange of the leaf and thus can also control the evaporation rate in the range of two orders of magnitude.
Information and ideas:
The microscopic photo originates from an electron microscope.
Related media:
There are no other media directly related to this file.
Learning resource type:
Illustration
Subjects:
Biology
Grade levels:
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
School types:
Middle/high school
Keywords:
Environment (general); Leaf (plant); Water; Water cycle; Environment; Water (vital for life); Water circuit
Bibliography:
Siemens Stiftung Media Portal
Author:
MediaHouse GmbH using a photo from: Dartmouth Electron Microscope Facility (licence: CC0)
Rights holder:
© Siemens Stiftung 2016