5-氨基乙酰丙酸对油松种子萌发及生理特性的影响OA

In order to explore the effect of 5-aminolevulinic acid(5-ALA)soaking treatment on the ger-mination and physiological characteristics of Pinus tabulaeformis Carr.seeds,and to screen the best way to pretreat the seeds before seedling rearing,this experiment took the P.tabulaeformis Carr.seeds as the test material,and analyzed the effects of different concentrations of 5-ALA treatment for different times on the germination indexes and physiological indexes of the seeds.The results showed that the appropriate concentration of 5-ALA soaking treatment for the appropriate time could effec-tively promote the germination of the seeds and seedling growth,in which,30 mg/L 5-ALA soaking treatment for 12 hours had the best effect,and the germination percentage,germination potential,germination index and vigor index of the P.tabulaeformis Carr.seeds were significantly increased by 7.34％,9.00％,14.86％and 28.57％,respectively,and the relative electrical conductivity was signifi-cantly reduced,and the soluble sugar and soluble protein contents were significantly reduced.Soluble sugar and soluble protein content increased significantly,ether extract content decreased significantly,superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)activity increased,increased seed-ling root length,axis length and water content,chlorophyll content and carotenoid content increased significantly.However,excessive concentration of 5-ALA inhibited the germination of the seeds.