What direction do plants grow towards in the dark? (Tropisms)

Watch
?Hannah
Badges: 14
Rep:
?
#1
Report Thread starter 4 years ago
#1
Quick question in biology homework
0
reply
RMNDK
Badges: 3
Rep:
?
#2
Report 4 years ago
#2
(Original post by hannahrobinsxn)
Quick question in biology homework
Think about the tropisms you've learn: phototropism, geotropism, hydrotropism (possible others).

There's no light so phototropism is out of the question. Hydrotropism concerns only the roots.
The only tropism exhibited by the shoot is geotropism, specifically negative geotropism. Auxin will stimulate the cells to elongate and grow upwards to counteract gravity. Since there's no light to stimulate a positive phototropic effect, they simply just keep growing up straight.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Have you experienced financial difficulties as a student due to Covid-19?

Yes, I have really struggled financially (57)
17.17%
I have experienced some financial difficulties (94)
28.31%
I haven't experienced any financial difficulties and things have stayed the same (126)
37.95%
I have had better financial opportunities as a result of the pandemic (44)
13.25%
I've had another experience (let us know in the thread!) (11)
3.31%

Watched Threads

View All