混合盐胁迫对油葵保护性酶活性、细胞膜透性及其主要农艺性状的影响

Effects of mixed salt stress on protective enzyme activity,cell membrane permeability and main agronomic traits of oil-sunflower

研究了不同浓度混合盐NaCl和NaHCO3对油葵苗期叶片、根系细胞膜透性,SOD、POD酶活性,油葵物候期、成熟期主要农艺性状的影响,目的在于对其耐盐性进行初步鉴定。结果表明:随着土壤混合盐浓度增大,叶片和根系的细胞膜透性,SOD、POD酶活性均呈现上升的趋势,差异显著,其中叶片SOD酶活性明显高于根系,并与盐浓度呈极显著的正相关。油葵的整个生育期明显受土壤盐浓度的影响,生育期延长,百粒重、单株产量、盘径、株高、干物质、鲜重有较大幅度下降。

Effects of NaC1 and NaHC03 on membrane permeability, SOD activity and POD activity of roots and leaves as well as specific characteristics of the tolerance of oil-sunflower were studied under various levels of salt stress. The results showed as follows： Compared with CK, membrane permeability, SOD activity and POD activity of the root and leaves appeared an increasing trend and significant level with the increase of salt concentration. At the same time the SOD activity of leaves was significantly higher than that of roots. The effects of salt concentration on phenology was signif- icant in oil-sunflower, and the growth period of oil-sunflower was delayed, while the plant height, faceplate diameters, dry weight and fresh weight of shoot and root and 100-grain weight declined significantly.