The effects of DORN 1 mutation on the germination and H2O2 metabolism of Arabidopsis thali-ana seeds under salt stress were studied using DORN1 mutant(dorn1-3,in which T-DNA destroys the gene encoding exATP receptor DORN1).The results showed that DORN1 mutation could significantly reduce seed germination under salt stress,for the latter significantly increased the content of H2O2 and the activities of H2O2-scavenging enzymes in seed germination.The quenching agent of H2O2 could alleviate the inhibition of salt stress on the seed germination,indicating that a decrease of seed germination under salt stress could be closely related to H2O2 metabolism.Further observation showed that under salt stress DORN1 mutation could significantly increase the content of H2O2 and the activities of H2O2-scavenging enzymes during seed germination,suggesting that DORN1 mutation might affect seed germination under salt stress by altering the metabolism of H2O2.These observations suggest that the exATP receptor DORN1 plays an important regulatory role in Arabidopsis seed germination under salt stress,and this role is related to H2O2 metabolism.
关键词
盐胁迫/细胞外ATP受体/种子萌发/过氧化氢
Key words
salt stress/exATP receptor/seed germination/hydrogen peroxide
维普
万方数据