大豆生長於鹽逆揖情況下，若經馴化，其葉細胞中的glutationereductase 等酵素活性，均比末馴化植物高的很多。遺些酵素於正常生長情況下均分佈於棄掉體，但在鹽逆境下，其活性大步發現於細胞質中。由於這些醇素括性的增加，使細胞中由於鹽逆鏡所產生的過氧化氫濃度減少，以致減少細胞臨的脂質過氧化作用2而保持細胞膜的完整性。由於細胞膜未植過氧化氫所碰撞，所以細胞中的離于或其它物質，則不會審露出來，也因而使細胞能持保持適中的慘遭壓，以便植物於鹽逆墳情配下不敢脫7.1<.而不能生存。另外，gLutathione reductase 活性也使細胞中的GSH/GSSG含量比例增加。此比側的提高，也可使植物細胞中含有一血的酵素保持其還原性而不被氧化而3年去其催化活性o所以高體度的GSG/GSSG比冊，對植物的耐盟性也有極重要的生理明白E。

Salt-acclimated soybean plants had higher activities of glutathione reductase and of its related enzymes， ascorbate peroxidase. and dehydroascorbate reductase， than those of non-acclimated plants grown under the salt-stress wndition. Those enzymes， which mainly distributed 1.11 different organelles under normal growth condition， became predominantly in cytosol under this adverse env.ironrment. Those H202 scavenging enzymes might protect the plasma membrane of leaf cells from lipid peroxidation. The maintaining of integ.ity of plasma membrane of leaf cells by reduction of the lipid peroxidation might reduce the lev，el of ionic leakage out of cells， and so favors plants to adapt �he salt-stress ，environment.Besides， the glutathione reductase also kept high ratio of GSH/GSSG in cytosol. ·I"hehigh ratio of GSH/GSSG may bave po·sitive effects on plants to tolerat the salt-stress environment.