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Biological Properties Of Betaine
Dec 12, 2017

Maintains cell osmotic pressure: When subjected to salinity or water stress, a large amount of organic osmotic regulator such as betaine accumulates in the cytoplasm, and the inorganic osmotic regulator in the cytoplasm mainly helps to squeeze the vacuole to make cytoplasm and intracellular vacuoles) External environment to maintain the infiltration balance, thus avoiding the high concentration of inorganic cytoplasm of enzymes and metabolic poisoning. Betaine accumulation in plants under salt stress is an important physiological phenomenon conducive to plant growth under stress and its content is positively correlated with plant salt tolerance.

The protective effect of the enzyme: Betaine high solubility, without electrostatic charge, the high concentration of many enzymes and other biological macromolecules had no effect, and even have a protective effect. Betaine protects the cell membrane of beet root to prevent heat damage and increase the temperature required for enzymatic thermal denaturation; can protect the spinach thylakoid membrane against freezing stress; relieves the poisoning of enzyme activity by high concentration of salt; prevents dehydration-induced protein thermokinetics Interference; aerobic respiration and energy metabolism process also has a good protective effect. Betaine has a stabilizing effect on the peripheral skin of PSH.

Persistence of salt resistance: Betaine rapidly synthesizes and accumulates to very high concentrations in the body, with no feedback inhibition in the biosynthetic reaction and produces NAOH. Among the more than 150 metabolites studied, betaine is the best osmolyte and a very low concentration of exogenous betaine works well. Such as medium containing o8m (Xi Na a few NaCI, Escherichia coli growth stopped completely, but adding 10 yang lo) few betaine, the growth was completely restored when the stress relieved, the content of proline in the leaves and roots immediately Decreased, while the content of betaine remained basically stable, indicating that the accumulation of proline is a temporary plant stress response, while the accumulation of betaine may be permanent or semi-permanent.Betaine metabolism is slow, indicating Betaine metabolic regulation is mainly determined by the synthesis.

Affect the Distribution of Inorganic Ions: Barley can accumulate betaine under salt stress. Betan Garoon and others in the study of betaine accumulating mangrove plants found that betaine can be transported through the betaine / P roline transporter. Liu Jun and other exogenous betaine to observe the alleviating effect of barley on salt stress, the results showed that betaine can reduce the membrane lipid peroxidation, increase salt content of barley seedling roots and fresh weight of seedlings. Betaine treatment can significantly reduce the Na ratio in the root system. In the leaves, due to the large amount of root interception of phloem, lm was significantly lower than that of salt treatment, and betaine could trap ca2 + in root system, In addition, betaine has a certain regulatory effect on stomatal movement, respiration and related gene expression under adverse conditions.