Plant Labyrinth Lab Report
The Wonders of
Plants
Experiment 2 – Upside Down Mungbeans
Experiment 3 – Plant Labyrinth
6/18/2015
Mt Gravatt State High School
Trinity Wong
Abstract
Introduction:
Plants can’t move like animals do but they respond to certain stimuli, making them change the direction in which they grow. Plants are very sensitive to their environment and have evolved many forms of "tropisms" in order to ensure their survival.
A tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant.
Positive = the plant, or a part of it, grows in the direction from which the stimulus originates.
Negative = the plant, or part of it, grows away from the stimulus.
Tropisms frequently interact between …show more content…
Geotropism (gravity or earth stimulation)
Geotropism, also called gravitropism as plants use the gravitational pull for orientation. The roots of the plant grow into the soil (positive geotropism) in the direction of the gravitational pull of the Earth. The shoots of the plant grow in the opposite direction against gravity towards the light (negative geotropism, positive phototropism).
Amyloplasts, which are non-pigmented organelle found in some plant cells, settle at the bottom of the cells of the shoots and roots in response to gravity, causing calcium signalling and the release of indole acetic acid. Indole acetic acid (IAA, the most common, naturally-occurring plant hormone of the auxin class) inhibits cell elongation in the lower side of roots, but stimulates cell expansion in shoots, which causes shoots to grow upward. (As can be seen in figure 1)
Experiment Upside Down Mung beans will be mainly focused on …show more content…
If plants do not use photosynthesis, they would be unable to food for themselves and oxygen for other life forms. Entire food chains would lose its foundation, herbivores that depend on plant material for food would die off, and without their food source, and carnivores would disappear too. Soon, almost all creatures (including humans) would starve and die off because they ultimately depend on other plants and creatures for food. Furthermore, there will be massive amounts of carbon dioxide and very little oxygen left on Earth, making it difficult to
Plants
Experiment 2 – Upside Down Mungbeans
Experiment 3 – Plant Labyrinth
6/18/2015
Mt Gravatt State High School
Trinity Wong
Abstract
Introduction:
Plants can’t move like animals do but they respond to certain stimuli, making them change the direction in which they grow. Plants are very sensitive to their environment and have evolved many forms of "tropisms" in order to ensure their survival.
A tropism is a growth movement whose direction is determined by the direction from which the stimulus strikes the plant.
Positive = the plant, or a part of it, grows in the direction from which the stimulus originates.
Negative = the plant, or part of it, grows away from the stimulus.
Tropisms frequently interact between …show more content…
Geotropism (gravity or earth stimulation)
Geotropism, also called gravitropism as plants use the gravitational pull for orientation. The roots of the plant grow into the soil (positive geotropism) in the direction of the gravitational pull of the Earth. The shoots of the plant grow in the opposite direction against gravity towards the light (negative geotropism, positive phototropism).
Amyloplasts, which are non-pigmented organelle found in some plant cells, settle at the bottom of the cells of the shoots and roots in response to gravity, causing calcium signalling and the release of indole acetic acid. Indole acetic acid (IAA, the most common, naturally-occurring plant hormone of the auxin class) inhibits cell elongation in the lower side of roots, but stimulates cell expansion in shoots, which causes shoots to grow upward. (As can be seen in figure 1)
Experiment Upside Down Mung beans will be mainly focused on …show more content…
If plants do not use photosynthesis, they would be unable to food for themselves and oxygen for other life forms. Entire food chains would lose its foundation, herbivores that depend on plant material for food would die off, and without their food source, and carnivores would disappear too. Soon, almost all creatures (including humans) would starve and die off because they ultimately depend on other plants and creatures for food. Furthermore, there will be massive amounts of carbon dioxide and very little oxygen left on Earth, making it difficult to