Proline level and amylase and ascorbate peroxidase activity in the germination of Plantago ovata forsk (plantaginaceae) seeds

摘要

The species Plantago ovata has great importance for the pharmaceutical industry due to the high mucilage level in its seeds. Thus, the present study aimed to verify proline level and amylase and ascorbate peroxidase activity in the germination of seeds subjected to stress, which was induced by using PEG, NaCl and CaCl2 solutions. Fifty seeds were placed into filter paper moistened with 15 mL of such solutions at the potentials 0,-0.2, -0.4, -0.6 and -0.8 MPa in the presence of light at 25oC. Proline levels decreased during Plantago ovata germination under water and salt stress, whereas the activity of ascorbate peroxidase and amylase was higher under PEG-induced stress, relative to those induced by NaCl and CaCl₂.