Biostimulants
Osmoprotectants
Osmoprotectants are low-molecular-weight organic substances that help plants maintain their water balance and cell integrity under stressful conditions. Within biostimulants, osmoprotectants are used to limit damage from drought, salt, and temperature stress and to support the physiological stability of plants.
What are osmoprotectants?
Osmoprotectants (Osmoprotectants) are compounds that can accumulate in plant cells without being toxic. They contribute to regulating osmotic pressure and protecting cellular structures against dehydration and ionic disturbance.
- Low-molecular-weight, non-toxic compounds
- Active in the cytoplasm and vacuoles
- Support osmotic balance
- Protect proteins and membranes
Mechanism of osmo-protection
By accumulating in cells, osmoprotectants increase the osmotic potential without disturbing enzymatic processes. This allows water to be retained better and cell structures to remain intact.
Osmoprotectants and abiotic stress
Drought stress
In case of water shortage, osmoprotectants help maintain turgor pressure and limit structural damage to cells.
Salt stress
Under salt stress, osmoprotectants help reduce ionic stress and support ion balance in plant cells.
Temperature stress
In both heat and cold stress, osmoprotectants stabilize proteins and membranes and support metabolism.
Influence on plant physiology
Osmoprotectants influence multiple physiological processes, including water management, redox balance and enzyme stability, allowing plants to function better under stress.
Osmoprotectants in biostimulant formulations
Osmoprotectants are often used in biostimulants aimed at stress management, especially during stress-sensitive growth phases.
- Specifically applicable under abiotic stress
- Suitable for foliar and root application
- Easily combinable with other biostimulant raw materials
- Widely applicable in various crops
Effect on plant performance
Correctly applied osmoprotectants contribute to:
- Improved stress tolerance
- Retention of water balance
- Protection of cell structures
- Increased plant vitality
Overview: role of osmoprotectants
| Aspect | Contribution of osmoprotectants |
|---|---|
| Water balance | Retention of turgor pressure |
| Cell protection | Stabilization of membranes and proteins |
| Stress adaptation | Limiting damage under stress |
| Plant physiology | Support of vital processes |
| Formulation | Stress-oriented biostimulant raw material |