| What is Auxin? Where is it Made? | -A plant Hormone
-They control the Growth at the Tips of Shoots and Roots
-Auxin is made in the Tips |
| What does the Auxin do in the Tips? | -It will Diffuse backwards, to start up the Cell Elongation Process [Cells get Longer]
-This process happens with the Cells behind the Tips |
| What does Auxin Promote and Inhibit? | -Growth
-In the Roots, Auxin Inhibits Growth
-In the Shoot, Auxin Promotes Growth |
| Shoots are Positively Phototropic. What does this Mean? | -When the Tip is being Beamed on by Light, Auxin starts to gather more so on the Shaded Side [Majority goes on Opposite Side]
-The Cells there Grow [Elongate] Faster on that Side, which has the Shoot bend, toward the Light
-The Positive part is saying that it Grows Towards the Source |
| Shoots are Negatively Gravitropic. What does this Mean? | -When the shoot grows Sideways, the Gravity makes an the Distribution of Auxin uneven, with the Majority on the Lower/Bottom side
-The Lower side grows Faster, and the Shoot bends Upwards.
-The Negative part is saying it Grows Away the Source [Force] |
| Roots are Positively Gravitropic. What does this Mean? | -Root that grows Sideways will have the Auxin unevenly Distributed, and the Majority will be at the Bottom Side
-But the Extra Auxin cancels the Growth, so the Cells on the Top Side Elongate Faster, and the Root bends Downwards
-Since its Following Gravity's Forces, its Growing With it [Positive] |
| Roots are Negatively Phototropic. What does this Mean? | -If the Root gets Beamed on with Light, the Majority of the Auxin will go to the Shaded Side
-Again, the Extra Auxin cancels the Growth, so the Cells that has the Sunshine on Elongate, and therefore the Root grows Downwards
-Since its growing Away from Light, its Negative |
| Explain a Practical that can Prove of the Positive Phototropic | -Put 10 cress seeds, in 3 different Petri dishes, that is Lined with Most Filter Paper
-Shine a Light Directly on one, and Different Directions on the Other two
-Wait a Week, and then you will see that the Cress Seeds are growing Towards the Light [Other variables: Temperature, distance from Lamp and Type of Seeds should be the Same] |
| What is Gibberellin? | -Plant Hormone
-This starts Seed Germination, [Seed grows to a Plant], Stem Growth and Flowering |
| How can Gibberellin start the Stem? Can it work with Auxin? | -It can because of Stem Elongation. [Like with Cell Elongation]
-Working with auxin can create Huge effects on the Plant Growth |
| How is Ethene made, and what does it do? | -Ethene is found in Aging leaves
-It makes the Cells that connect the Leaf to the Plant to Expand, making the Cell break the Cell Walls, therefore breaking the Connection
-Ethene can also make Enzymes, that can make Fruit to Ripen |
| How can Auxin be involved in Leaves? | -Auxin is also made by Young Leaves
-Auxin also stops the Shedding of Leaves
-As the leaf gets older, it makes Less Auxin [Leaf Loss] |
| Selective Herbicides: Explain in terms of Plant Hormones | -Selective Herbicides [Weed killers] made using Auxin
-Majority of weeds in a Field growing are Broad-leaved, and Grass an Cereals are opposite, Narrow-leaves
-Weed killers affect only the Broad leaved. Their normal Growth is disturbed from the Auxin, therefore killing them |
| Rooting Power: Explain in terms of Plant Hormones | -Cutting is simply a bit of the Plant that was Cut off
-A cutting can't grow in the soil, usually, but Rooting powder changes that, because it has Auxin
-Roots quickly appear, as well as new Plants
-Clones can be made Quickly |
| Producing Seedless Fruit: Explain in terms of Plant Hormones | -Fruits, that has seeds, grow on Plants that have been Pollinated
-However, if Auxin and Gibberellins are given to the Unpollinated Flowers, the Fruit can grow, but the seeds
-This makes Parthenocarpic Fruit [Seedless Fruit] |
| Controlling Dormancy: Explain in terms of Plant Hormones | -Seeds won't Germinate [Grow and Put out Shoots] until they have experienced certain Conditions. This is Dormancy
-Seeds that are given Gibberellin can alter their Dormancy and can have them Germinate at a time of year where they Couldn't
-Can ensure that they all Germinate at the same time |
| How can Ethene be used in Transporting food? | -Ethen will make the Fruit want to Ripen. Fact
-But Fruit is first picked Unripe so that its Hard - meaning it will not be Damaged during Transport or Storage
-Ethene then Applied to make it Soft for me and you :) |
