
Что такое тургор?срочно!


Ответы на вопрос

Ответ:
напряжённое состояние оболочек живых клеток.
Объяснение:



Turgor: An Overview
Turgor is a term used in biology to describe the state of rigidity or firmness in plant cells and tissues due to the pressure exerted by the cell contents against the cell wall. It is a result of the osmotic flow of water into the cell, causing the cell to expand and become turgid. Turgor pressure plays a crucial role in maintaining the shape, structure, and overall health of plant cells.
The Role of Turgor Pressure in Plants
Turgor pressure is essential for various physiological processes in plants. Here are some key roles of turgor pressure:
1. Cell Expansion: Turgor pressure allows plant cells to expand and elongate, contributing to the growth and development of plant tissues and organs.
2. Leaf and Stem Rigidity: Turgor pressure provides rigidity to leaves and stems, enabling them to maintain their shape and withstand external forces such as wind or gravity.
3. Support for Plants: Turgor pressure helps support the weight of plants, preventing them from wilting or collapsing.
4. Transport of Nutrients: Turgor pressure facilitates the movement of water, minerals, and other nutrients within the plant's vascular system.
Factors Affecting Turgor Pressure
Several factors influence turgor pressure in plant cells. These include:
1. Water Availability: Turgor pressure depends on the availability of water. When water is abundant, cells absorb it through osmosis, leading to increased turgor pressure. Conversely, water deficiency can cause a decrease in turgor pressure, resulting in wilting.
2. Osmotic Potential: The osmotic potential of the cell contents affects turgor pressure. Higher solute concentrations inside the cell create a lower osmotic potential, leading to water uptake and increased turgor pressure.
3. Cell Wall Elasticity: The elasticity of the cell wall influences turgor pressure. A more rigid cell wall can withstand higher turgor pressure, while a less elastic cell wall may limit the expansion of the cell.
Conclusion
In summary, turgor is the state of rigidity or firmness in plant cells due to the pressure exerted by the cell contents against the cell wall. Turgor pressure is crucial for maintaining the shape, structure, and overall health of plant cells. Factors such as water availability, osmotic potential, and cell wall elasticity affect turgor pressure in plants.
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