Abstract: Four different types of sesame germplasm resources ( Single-stem white sesame,Branched-stem white sesame,Single-stem Black sesame and Branched-stem black sesame ) treated with artificial ageing were used in this study. The standard germination test, electrical conductivity test, MDA content test, POD activity test and TTC re-ductive amounts test were conducted. The result showed that the germination potential,germination rate,germination index,vigor index,TTC reductive amounts and POD activity declined gradually with the increase of seed aging time, whereas MDA content increased gradually. The trend of conductivity change was not consistent between materials. The differences of resistance to artifical aging existed among the four accessions. With the correlation analysis be-tween the seed vigor indexes and the simulated field emergence rate,we got the conclusions that the suitable seed vigor testing methods for Single-stem white sesame were germination rate and electrical conductivity tests;for Branched-stem white sesame were germination rate,electrical conductivity test,MDA content test,POD activity test and TTC reductive amounts test;for Single-stem black sesame were germination rate and POD activity test;and for the Branched-stem black sesame were germination rate and TTC reductive amounts test. The results showed that ac-celerated aging under conditions of 42-43 ℃at 100%RH for 72 h were appropriate for an accelerated aging test for seed vigor in sesame.

Key words: Sesame, Accelerated aging, Seed vigor, Physiological characteristics, Vigor testing methords

CLC Number: 

• S565.3