-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Auxin and plant hormones
- Thread starter Alzaabi
- Start date
- Messages
- 220
- Reaction score
- 202
- Points
- 53
I don't have notes here but I can explain it to u
Auxin is kind of a plant growth hormone which make the plant grow rapidly.
If the plant receive sunlight on one side, the auxin gathers on the other side and make the plant grow towards the light. Usually auxin are present everywhere in the plant the are more in the darker side. It is because of these Auxin plant bend towards light
Auxin is kind of a plant growth hormone which make the plant grow rapidly.
If the plant receive sunlight on one side, the auxin gathers on the other side and make the plant grow towards the light. Usually auxin are present everywhere in the plant the are more in the darker side. It is because of these Auxin plant bend towards light
- Messages
- 220
- Reaction score
- 202
- Points
- 53
Plant hormones are signal molecules produced within the plant, and occur in extremely low concentrations. Hormones regulate cellular processes in targeted cells locally and when moved to other locations, in other locations of the plant. Hormones also determine the formation of flowers, stems, leaves, the shedding of leaves, and the development and ripening of fruit. Plants, unlike animals, lack glands that produce and secrete hormones, instead each cell is capable of producing hormones. Plant hormones shape the plant, affecting seed growth, time of flowering, the sex of flowers, senescence of leaves and fruits. They affect which tissues grow upward and which grow downward, leaf formation and stem growth, fruit development and ripening, plant longevity, and even plant death. Hormones are vital to plant growth and lacking them, plants would be mostly a mass of undifferentiated cells.
Attachments
Auxis are hormones produced at the tip of the plant.
They are killed by light so they are always on the shady part of the shoot, This makes it grow at high rate in this area causing it to bend towards light. That's positive phototropism
When there is a high concentration of auxins, this causes elongation at this side so the plant will grow away from light and when auxins accumulate on the side of light, then it will grow away from light.
Geo tropism, Auxins accumulate on the oposite side of gravity, making it grow at a high rate in this area so it grows towards gravity but when it is on the down side then it grows towards light, negative geotropism and positive phototropism in one.
They are killed by light so they are always on the shady part of the shoot, This makes it grow at high rate in this area causing it to bend towards light. That's positive phototropism
When there is a high concentration of auxins, this causes elongation at this side so the plant will grow away from light and when auxins accumulate on the side of light, then it will grow away from light.
Geo tropism, Auxins accumulate on the oposite side of gravity, making it grow at a high rate in this area so it grows towards gravity but when it is on the down side then it grows towards light, negative geotropism and positive phototropism in one.