Question

Какие изменения происходят у деревьев и кустарников осенью

Answer 1

Идет подготовка к зиме. В связи с укорочением светового дня происходит разрушения хлоропластов в листьях в результате чего листья желтеют и опадают.

Answer 2

У них начинают выпадать листья

Answer 3

Changes in Trees and Shrubs during Autumn

Autumn is a season of change, and this is particularly evident in the transformation of trees and shrubs. During this time, several notable changes occur in these plants. Let's explore some of the key changes that take place during autumn:

1. Leaf Color Change: One of the most noticeable changes in trees and shrubs during autumn is the vibrant display of colors in their leaves. As the days become shorter and temperatures drop, the production of chlorophyll, the pigment responsible for the green color in leaves, decreases. This allows other pigments, such as carotenoids (which produce yellow and orange colors) and anthocyanins (which produce red and purple colors), to become more visible.

2. Leaf Drop: As autumn progresses, trees and shrubs shed their leaves in a process known as leaf abscission. This is a natural response to the changing environmental conditions. The abscission layer forms at the base of the leaf stem, cutting off the flow of nutrients and water to the leaf. Eventually, the leaf falls off, allowing the plant to conserve energy and prepare for the winter months.

3. Fruit and Seed Production: Autumn is also a time when many trees and shrubs produce fruits and seeds. These structures serve as a means of dispersal, allowing plants to reproduce and spread their genetic material. Examples of fruits and seeds commonly seen during autumn include acorns, berries, and cones.

4. Bark Changes: In addition to changes in leaves and fruits, some trees and shrubs also undergo changes in their bark during autumn. For example, the bark of certain species may become more textured or develop a different coloration. These changes can provide added protection against harsh winter conditions and may also serve as a form of camouflage.

5. Preparation for Winter: Autumn is a crucial time for trees and shrubs to prepare for the upcoming winter. They undergo physiological changes to ensure their survival during the colder months. These changes include the production of protective compounds, such as antifreeze proteins, and the closure of leaf buds to prevent damage from freezing temperatures.

It's important to note that the specific changes observed in trees and shrubs during autumn can vary depending on the species and environmental conditions. Additionally, the timing and intensity of these changes can be#### Changes in Trees and Shrubs During Autumn

During autumn, trees and shrubs undergo several changes as they prepare for the winter season.

Color Changes: One of the most noticeable changes during autumn is the transformation of foliage colors. The leaves of many trees and shrubs change from green to vibrant hues of red, orange, and yellow as the days become shorter and temperatures drop.

Leaf Shedding: As autumn progresses, trees and shrubs begin to shed their leaves. This process, known as abscission, involves the formation of a layer of cells at the base of each leaf's stem, which eventually causes the leaves to fall off.

Preparation for Winter: During autumn, trees and shrubs also prepare for the harsh winter conditions. They reduce their metabolic activities and conserve energy by shedding leaves and entering a state of dormancy.

Fruit and Seed Production: Autumn is a crucial time for the production and dispersal of fruits and seeds by trees and shrubs. Many species produce fruits and seeds during this season, which are then dispersed by wind, animals, or other means.

Environmental Adaptations: In addition to these visible changes, trees and shrubs also undergo various environmental adaptations during autumn. These may include changes in root growth, nutrient storage, and the development of protective structures to withstand the upcoming winter.

Overall, autumn brings about a series of significant changes in trees and shrubs as they prepare for the winter season, including color transformations, leaf shedding, preparation for winter, fruit and seed production, and environmental adaptations.