Turgorins

Turgorins are a class of plant signaling molecules involved in mediating responses to environmental stimuli, particularly touch and gravity. They are thought to be a type of phytohormone, though their precise classification and mechanisms of action are still areas of active research. Turgorins are primarily associated with the regulation of plant movements, such as the nastic movements observed in some plants, like Mimosa pudica, in response to mechanical stimulation.

The term "turgorin" is derived from "turgor," referring to the turgor pressure within plant cells, which is the force exerted by the cell contents against the cell wall. Changes in turgor pressure are crucial for many plant processes, including cell expansion and movement. Turgorins are believed to influence these turgor changes by affecting ion fluxes across cell membranes, particularly potassium ions and chloride ions. These ion movements alter the osmotic potential within specific cells, leading to water redistribution and subsequent changes in cell volume and pressure.

Research suggests that turgorins are not a single compound but rather a group of molecules that may include calcium ions, signaling lipids, and potentially other small organic molecules. Their production and signaling pathways are activated by various mechanical stimuli, including wind, touch, and even sound waves. While their role in rapid movements is well-studied, there is also evidence suggesting turgorins may play a part in longer-term developmental processes and in plant defense responses. Further investigation is ongoing to fully elucidate the diverse roles and biochemical nature of turgorins in plant physiology.