盐胁迫对粳稻品种生长和生理特性的影响

以津原85、金穗26、隆粳27、辽粳763为试验材料,研究了不同盐胁迫浓度对这4个品种生长和抗逆性的影响,以期为盐碱地适宜水稻品种的筛选提供理论参考。结果表明,盐胁迫显著抑制水稻幼苗的生长,金穗26受到的影响最小。在盐胁迫下,津原85离子选择吸收性较强,有利于提高耐盐性。盐胁迫对水稻的主要伤害是破坏膜质结构,进而影响细胞正常功能。盐胁迫浓度较高时,细胞丙二醛含量表现为辽粳763>隆粳27>津原85>金穗26。耐盐性水稻品种和盐敏感水稻品种的过氧化氢酶活性也有差别。综合来看,耐盐性高低依次表现为金穗26>津原85>隆粳27>辽粳763。

Effects of Salt Stress on Elements Absorption and Stress Resistance of Japonica Rice Varieties

The effects of different salt stress concentrations on the growth and stress resistance of four japonica rice varieties Jinyuan 85, Jinsui 26, Longgeng 27, Liaogeng 763 were studied, in order to provide a theoretical reference for the screening of suitable rice varieties in saline-alkali land. The results showed that salt stress significantly inhibited the growth of rice seedlings, and the growth of Jinsui 26 seedlings was the least affected by salt. Under salt stress, Jinyuan 85 ion had strong selective absorption, which is beneficial to improve its salt tolerance. The main damage of salt stress to rice was that salt stress destroys the membrane structure and further affects the normal function of cells. When the salt stress concentration was higher, the MDA content of the cells was Liaogeng 763>Longgeng 27>Jinyuan 85>Jinsui 26. There were also differences in catalase activity between salt tolerant rice and salt sensitive rice. Taken together, the order of salt tolerance was Jinsui 26> Jinyuan 85> Longgeng 27> Liaogeng 763.