How do flowers turn and e.g. follow the sun?

Question

It's a lovely sunny day and I was thinking for France and sunflowers. It is a mystery to me how sunflowers face the sun all day. That means that they rotate throughout the day and at night they let their heads hand down. How do they do that? They haven't got any muscles because they are plants.

Answer 1

A PARTIcular class of plant hormones(phytohormones) called auxins are responsible for this behavior.plants do not have muscles but they show curvature(turning) movements due to different growth on different sides.This differential growth is due to  more pressure created by water (turgor)  on one side and so, can be easily changed leading to rotationary movements of sunflower.the same hormone is also  responsible for the movement of plant stem toward light source

Answer 2

god helps them

Answer 3

The phototropic ones only follow the sun for a period. When the sunflower is growing the stem & material is soft and pliable, the unbloomed bud is light and will follow the sun during this phase. However, when the sunflower blooms the sunflower slowly stops growing, instead putting the energy into the seed head. At this point the rest of the sunflower (stem, etc.) starts to solidify, and will eventually solidify facing in an eastwardly direction and the bloom will no longer follow the sun. So, the phototropic ones do follow the sun but only for a time and once bloomed will eventually "freeze" facing in an eastwardly direction.

Answer 4

plants growing towards the sun is called phototropism. plant hormones that are sensitive to light (auxins) are found on the side of the plant in the shade (they are photophobic) auxins loosen plants cell walls so that osmosis (diffusion of water) happens at a greater rate so the cells expand more (becoming turgid). If the side containing auxins expands the plant will face the light

Answer 5

The stems of the flowers contain a hormone called auxin.  This hormone speeds up cell growth.  But it is "shy" of light (photophobic) so it moves to the shady part of the stem. This part of the stem therefore grows faster than the sunny side making the stem curve toward the light. So as the sun moves during the day the auxin move to the shady part of the plant and so the flower faces the sun.

Answer 6

I am no expert but all plants face the sun for photosynthesis, the fiber in the stems will move and form to where the flower can face the sun and get the maximum light available to produce food for itself.