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在NaCl胁迫下 ,番茄种子萌发过程中超氧物歧化酶 (SOD)和过氧化氢酶(CAT)活性明显降低 ,丙二醛 (MDA)含量和电解质渗漏显著增加 ,种子内Na+ 含量大幅度上升而K+ 大量外渗 ,从而显著抑制种子萌发。将种子进行吸湿—回干处理后再置于NaCl胁迫下 ,NaCl的上述伤害得到显著缓解。吸湿—回干处理有可能通过提高细胞膜保护酶活性 ,抑制膜脂过氧化来维持细胞膜结构的完整性 ,因而减少Na+ 的大量吸收及K+ 的外渗 ,最终提高了盐胁迫下种子的萌发能力。
Under NaCl stress, the activity of superoxide dismutase (SOD) and catalase (CAT) in tomato seeds decreased significantly, and the content of malondialdehyde (MDA) and electrolyte leakage increased significantly, and the content of Na + in seeds increased significantly The K + extravasation, which significantly inhibited seed germination. After the seeds were hygroscopic-dried and then placed under NaCl stress, the above-mentioned injuries of NaCl were significantly relieved. Hygroscopicity - dehydration treatment may improve the integrity of cell membrane structure by increasing cell membrane protective enzyme activity and inhibiting membrane lipid peroxidation, thus reducing the large absorption of Na + and the extravasation of K +, finally increasing the seed germination ability under salt stress.