Movement of the plant. (1973)

Forest.

Lawn.

Wildflowers.

Accelerated shooting of the germination of the seed of the plant.

With this shooting, the movement of the sprout is clearly visible.

A cartoon explaining which part of the plant and which substances regulate its growth.

The hormone auxin stimulates plant growth.

The hormone is especially active in the cell division zone and in the stretching zone.

Tropisms are growth movements that plants make under the influence of a unilaterally directed stimulus.

The root of the seed grows downwards, as a reaction of the plant to gravity.

Changing the movement of the root when applying top dressing.

When a toxic substance is introduced into the ground for the plant, the root bypasses it.

The stem moves in the opposite direction, because it has a negative tropism.

When the plant is positioned horizontally, the stem turns into a vertical position.

A field with sunflowers.

The tops of the plants bend towards the light.

This behavior of the plant allows the most complete use of light for photosynthesis.

Climbing plants feel the surfaces, find support and pull the plant up.

Accelerated shooting of this process.

The process of turning the plant to the light is controlled by auxins, they accumulate on the shadow side of the plant and tilt it towards the light.

A cartoon explaining all kinds of tropisms.

Trees.

The sun shines through the foliage of the tree.

Accelerated shooting of the growth of flowers.

Nasti - movement of plants caused by the influence of an environment acting uniformly.

For example, the effects of temperature, humidity and light.

The flowers open when the illumination increases.

When the illumination decreases, at sunset, morning flowers close and night flowers open, for pollination by nocturnal insects.

Water lilies are closed even in bad weather, when the general illumination changes.

A cartoon explaining the mechanism of closing and opening flowers during photonasty.

The reaction of some plants to touch is also a dynamic movement.

A cartoon explaining the action of seismology.

Sourness.

When the sun increases the illumination of the sourdough, its leaves droop.

This is caused by two environmental factors - temperature and illumination.

Another example of nastic influence.

During the flowering period in many cereals, with an increase in temperature and a decrease in humidity, rapid growth of staminate filaments is observed.

Pollen is picked up by the wind and carried throughout the field.

The grain field is swaying in the wind.

Insectivorous plants growing on nitrogen-poor soils extract it from the bodies of dead insects.

A flycatcher plant catches a caterpillar.

In order for the plant to close, you need to touch the three bristles on the flower.

Dewdrop leaves.

The insect sticks to the surface of the leaf.

The leaf rolls up and gradually digests the insect, extracting nitrogen so necessary for the plant.

A swamp in the forest.

The poppy flower opens.

Alternating frames with plant movements.

The sunflower turns to the sun.