Ionic and Permeability Relationships of Polygonaceae Plants Growing at Different Salt Levels

Ionic and Permeability Relationships of Polygonaceae Plants Growing at Different Salt Levels

Note: The NaCl-induced K + and H + flow rates are dependent on the NaCl concentration, and the K + outflow and H + outflow rates have a significant positive correlation.

Salt is an important factor affecting crop yields. People solve the problem of high salt toxicity by improving the salt tolerance of crops, but this creates an economic burden. Polygonaceae plants are inherently resistant to salt. This extraordinary salt tolerance allows us to understand how plants react to salt, but its physiological mechanisms are still unclear.

In 2011, Australian scientists studied the relationship between quinoa ions and permeation of Polygonaceae using non-invasive micro-test techniques. They were treated with 6 salt levels (0-500 mM NaCl) for 70 days and found to be suitable for growth of 100 mM and 200 mM NaCl. It has described a very effective system Chenopodiaceae regulating osmotic NaCl to prevent the sudden appearance of coercion. K ⁺ was found to maintain high and low levels of Na ^+, K ⁺ stem portion gradually increases in old leaves in young plants, which is a salt of K ⁺ in the environment osmoregulation important role evidence. After 5-fold increase (from 100 mM increased to 500 mM) salt level, only Na ⁺ content increased by 50%, indicating a very strong xylem control Na ⁺ or Na ⁺ from the effective capacity divided by shifting the blade.

Chenopodiaceae K after receipt of the root inducing NaCl ⁺ H ⁺ efflux and a strong positive correlation between the outer stream, the described fast NaCl induced H ⁺ - ATPase activation needs to be restored or increased membrane potential depolarization The cytoplasm further leaks K ⁺ . This work emphasizes the osmotic adjustment of inorganic ions in halophytes, the process of controlling the loading and transport of lignin Na ⁺ and K ⁺ to stems.

Key words: saline soil plant, ion loading, membrane transport, osmotic adjustment, K ⁺ , salt stress

References: Hariadi Y et al. Journal of Experimental Botany, 2011, 62: 185 - 193.

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