Why do you think the sunflower are tried of travelling habits.
Answers
Answered by
1
Scientists have answered a burning question central to the charm of sunflowers: Why do young flowers move their blooms to always face the sun over the course of a day?
And then: Once sunflowers reach maturity, why do they stoptracking the sun and only face east?
In a newly-published article in Science, the researchers say the young plant's sun-tracking (also called heliotropism) can be explained by circadian rhythms – the behavioral changes tied to an internal clock that humans also have, which follow a roughly 24 hour cycle. A young flower faces east at dawn and greets the sun, then slowly turns west as the sun moves across the sky. During the night, it slowly turns back east to begin the cycle again.
"It's the first example of a plant's clock modulating growth in a natural environment, and having real repercussions for the plant," UC Davis professor and study co-author Stacey Harmer says in a press release from the university.
The researchers found that the plant's turning is actually a result of different sides of the stem elongating at different times of day. Science released this animation to illustrate the phenomenon:
"Growth rates on the east side were high during the day and very low at night, whereas growth rates on the west side were low during the day and higher at night," the journal article reads. Here's more:
"The higher growth rate on the east versus west side of the stem during the day enables the shoot apex to move gradually from east to west. At night, the higher growth rate on the west side culminates in the apex facing east at dawn."
The researchers tied plants up so they couldn't move or turned them away from the sun – and they found those flowers eventually had "decreased biomass and less leave area" than flowers that could move with the sun.
hope it helps!
please mark me as a brainliest!!
And then: Once sunflowers reach maturity, why do they stoptracking the sun and only face east?
In a newly-published article in Science, the researchers say the young plant's sun-tracking (also called heliotropism) can be explained by circadian rhythms – the behavioral changes tied to an internal clock that humans also have, which follow a roughly 24 hour cycle. A young flower faces east at dawn and greets the sun, then slowly turns west as the sun moves across the sky. During the night, it slowly turns back east to begin the cycle again.
"It's the first example of a plant's clock modulating growth in a natural environment, and having real repercussions for the plant," UC Davis professor and study co-author Stacey Harmer says in a press release from the university.
The researchers found that the plant's turning is actually a result of different sides of the stem elongating at different times of day. Science released this animation to illustrate the phenomenon:
"Growth rates on the east side were high during the day and very low at night, whereas growth rates on the west side were low during the day and higher at night," the journal article reads. Here's more:
"The higher growth rate on the east versus west side of the stem during the day enables the shoot apex to move gradually from east to west. At night, the higher growth rate on the west side culminates in the apex facing east at dawn."
The researchers tied plants up so they couldn't move or turned them away from the sun – and they found those flowers eventually had "decreased biomass and less leave area" than flowers that could move with the sun.
hope it helps!
please mark me as a brainliest!!
patidarsanjay4pda1l1:
Help me for answers
ok
Similar questions