The Response Difference of Mitochondria in RecalcitrantAntiaris toxicariaAxes and OrthodoxZea maysEmbryos to Dehydration Injury

To understand their different responses to dehydration, we examined the changes in mitochondria activity during dehydration

Song-Quan Song

2009

Scholarcy highlights

  • Long-term preservation of recalcitrant seeds is very difficult because the physiological basis on their desiccation sensitivity is poorly understood
  • Survival of Antiaris toxicaria axes rapidly decreased and that of immature maize embryos very slowly decreased with dehydration
  • To understand their different responses to dehydration, we examined the changes in mitochondria activity during dehydration
  • Activities of cytochrome c oxidase and malate dehydrogenase of the A. toxicaria axis and maize embryo mitochondria decreased with dehydration, the parameters of maize embryo mitochondria were much higher than those of A. toxicaria, showing that the damage was more severe for the A. toxicaria axis mitochondria than for those of maize embryo
  • The state I and III respiration of the A. toxicaria axis mitochondria were higher than those of maize embryo, the former rapidly decreased, and the latter slowly decreased with dehydration
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