氯化钙对盐胁迫下荆芥种子萌发及幼苗生理特性的影响

为研究盐胁迫下,氯化钙浸种对荆芥种子萌发及苗期生理特性的影响,以荆芥种子为试验材料,研究了不同浓度氯化钙(0、2.5、5、10、20、40 mmol·L-1)浸种后,在150 mmol·L-1 NaCl胁迫下,荆芥种子的萌发及幼苗生长指标的变化.结果 表明,在150 mmol·L-1 NaC1胁迫下,荆芥种子萌发及幼苗...

Effects of CaCl2 on Seed Germination and Seedling Physiological Characteristics of Schizonepeta tenuifolia Briq. under Salt Stress

In order to study the effects of calcium chloride soaking seeds on the germination and physiological characteristics of Schizonepeta tenuifolia Briq. under salt stress, the seeds were soaked in different concentrations of CaCl₂ (2.5, 5, 10, 20 and 40 mmol·L^-1). The germinations of seed and physiological characteristics of seedling were measured in 150 mmol·L^-1 NaCl solution. The results showed that the seed germination and seedling growth of Schizonepeta tenuifolia Briq. were obviously inhibited under 150 mmol·L^-1 NaCl stress. Compared with salt stress treatment without CaCl2, soaking seeds of CaCl2 could improve the germination rate, germination potential, germination index, vigor index of seeds and the height, root length, fresh weight of seedlings. And the activities of superoxide dismutase, peroxidase and catalase of seedlings were increased, while the contents of malonaldehyde were decreased after CaCl₂ soaking. In addition, the contents of proline and soluble protein of seedlings were decreased after CaCl₂ soaking. These results indicated that CaCl₂ soaking could alleviate the damage under salt stress, and the effect of the treatment with 20 mmol·L-1 CaCl₂ was the best, which provided theoretical basis and technical reference for the cultivation and production of Schizonepeta tenuifolia Briq. in saline land area.