Effects of MeJA on Seed Germination and Seedling Growth of Glebionis coronaria Under Salt Stress
Taking the seeds of Glebionis coronaria as the test material,the effects of exogenous methyl jasmonate(MeJA)at different application concentrations(0.02,0.20,2.0,20,200 μmol·L-1)and soaking times(0,3,6,9,12,15 hours)on the germination indicators(germination rate,germination index,germination time,and shoot length),seedling growth indicators(root length,stem length,relative water content),and physiological indicators(chlorophyll,soluble sugar,soluble protein,proline content)of Glebionis coronaria seeds under salt stress were studied by using a water culture method with small leaves,in order to explore the optimal application concentration and treatment time of MeJA to alleviate salt damage in Glebionis coronaria.The results showed that under 150 mmol·L-1 NaCl stress,MeJA-treated seeds could alleviate salt damage to varying degrees.Among them,treatment with a 20 μmol·L-1 MeJA solution for 6 hours was the optimal concentration and time,significantly increasing seed germination rate and germination index,and also showed good effects on the growth of Glebionis coronaria seedlings.The content of chlorophyll and osmotic regulating substances increased.
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