Turgorbedingten

Turgorbedingten is a term used in plant physiology to describe processes and phenomena that are influenced or driven by turgor pressure within plant cells. Turgor pressure refers to the hydrostatic pressure exerted by the cell contents against the cell wall, arising when water is taken up into the cell’s vacuole by osmosis. The concept is central to understanding how plant cells maintain rigidity and how tissues respond to changes in hydration.

The generation of turgor pressure depends on water potential, which combines solute potential and pressure potential. When the cell wall is capable of withstanding internal pressure, water entry increases turgor, contributing to cell expansion and the mechanical support of tissues. Conversely, loss of water reduces turgor and can lead to wilting or plasmolysis, where the plasma membrane pulls away from the cell wall under hypertonic conditions.

Turgor pressure has several key roles. It provides structural support for non-woody tissues, drives rapid movements in some plants, and enables growth through controlled cell expansion as the cell wall loosens in response to turgor and developmental signals. In guard cells, changes in turgor regulate stomatal aperture, affecting gas exchange and transpiration.

Methods exist to measure turgor, such as pressure probes, and turgor-related concepts are fundamental in studies of drought tolerance, irrigation strategies, and postharvest physiology. In German-language literature, turgorbedingten emphasizes the dependence of observed effects on internal hydrostatic pressure.