Question

Почему растение увядает, если содержание влаги в почве недостаточно??? объясните на примере транспирации

Answer 1

Дефицит влаги действует на процессы поглощения воды,прорастания семян , транспирацию.Особенно часть влаги теряется через транспирацию особенно при ярком свете или высокой температуре.Я не очень поняла ваш вопрос, но это все что я о ней знаю

Answer 2

Why do plants wilt if there is insufficient moisture in the soil? Explain using the example of transpiration.

When a plant does not receive enough moisture from the soil, it can lead to wilting. This is because water plays a crucial role in maintaining the turgidity and overall health of plant cells. Insufficient moisture in the soil affects the process of transpiration, which is the loss of water vapor from the plant's leaves.

Transpiration is the process by which water is transported from the roots to the leaves of a plant and then evaporates into the atmosphere. It occurs through tiny openings on the surface of leaves called stomata. These stomata allow water vapor to escape, creating a gradient that pulls water up through the plant's vascular system.

When there is not enough moisture in the soil, the plant's roots struggle to absorb an adequate amount of water. As a result, the water potential in the plant decreases, causing the stomata to close partially or completely. This closure helps to conserve water within the plant, but it also restricts the exchange of gases, including carbon dioxide needed for photosynthesis.

Without sufficient water, the plant's cells lose turgor pressure, which is the pressure exerted by the cell contents against the cell wall. Turgor pressure helps to maintain the rigidity and shape of plant cells. When turgor pressure decreases, the plant cells become flaccid, causing the plant to wilt.

Additionally, water is essential for nutrient uptake in plants. When there is a lack of moisture in the soil, the plant's ability to absorb essential nutrients is compromised. This can further weaken the plant and contribute to wilting.

In summary, when a plant lacks sufficient moisture in the soil, it affects the process of transpiration, leading to the closure of stomata and reduced water uptake. This results in a decrease in turgor pressure, causing the plant cells to become flaccid and the plant to wilt.