In particular, sunflowers always seek to face the sun, how do this work??? Does it depend on there growth, as in that they grow towards the sunlight due to their ability to photosynthesis at a higher rate when facing that certain direction?
In: Earth Science
I KNOW THIS ONE!!!
I can remember this lesson from school. Apparently “because they want to” isn’t a legit reason.
Plant stems have something called auxins in them. The plant stem grows at the and rate , but sunlight reacts with the auxins and inhibits the growth on that side of the stem, hence the opposite side grows faster and the plants lean towards the sun.
Auxins. Thanks Mrs Barker.
There are many more reasons for this. One of them is the plant hormone Auxin. When a plant receives sunlight only from a side,the Auxin hormone moves towards the side which doesn’t receive sunlight. Auxin is a growth hormone, thus it promotes growth of the part with less sunlight. Hence,the part in sunlight grows slowler than the part which doesn’t receive light. This results in bending of the plant towards the light.
The cells around the plant respond to light levels. The side facing the sun gets more light and this triggers a response to grow in that direction.
Latest Answers