The salinization of the soil is very serious, causing many agricultural and environmental problems. How to study the response of plants to salt-alkali stress and find plant varieties that can resist salt-alkali stress is one of the means to deal with soil salinization. The mechanism of salt stress on plants has been studied in the past. However, the salt stress and salt resistance of woody plants are not only difficult, but the understanding of the mechanism is stagnant.

Chen Shaoliang Laboratory of Beijing Forestry University used "non-invasive micro-testing technology (SIET)" to determine the H ⁺ of the salt-tolerant varieties of Populus euphratica and salt-sensitive varieties of poplar roots, cells and protoplasts. , Na ⁺ and Cl ^- flow rates, comparing the ability of Na ⁺ in the two varieties after short-term treatment and long-term treatment. Long-term stress leads to an increase in Na ⁺ outflow from root protoplasts and an increase in H ⁺ influx. Such NaCl-induced Na ⁺ / H ⁺ exchange are suppressed Amiloride and sodium alum, described the stress is discharged Populus Na ⁺ Na ⁺ / H ⁺ antiporter proactively transmembrane results. In contrast, the Na ⁺ / H ⁺ antiporter is lacking in the root tissue and cell levels of the masses after salt stress. In addition, the salt-stressed Populus euphratica retains a higher Cl ^- capacity than the poplar. Populus roots NaCl induced H ^+, Na ⁺ and Cl ^- in the different streams and isotonic mannitol caused by ion flow, the ion current indicates that the transition is mainly caused by the ion effect.