The Long-Standing Paradox of Seed Dormancy Unfolded?
2019
Nonogaki, Hiroyuki
There has been a long-standing question in seed research, why cyanide, a respiration inhibitor, breaks seed dormancy. While the alternative respiratory pathway and reactive oxygen species have been suggested to be part of the mechanism, the cell biological and mechanistic significance of this paradox remains unclear. The outcomes of recent research on mitochondrial RNA processing for the subunits of the electron transport chain complexes seem to offer a logical explanation. This opinion article attempts to integrate the accumulating evidence of mitochondrial involvement in ABA signaling with the frontier of seed research on DELAY OF GERMINATION1, a master regulator of dormancy, to present a coherent model for ABA signaling in seeds, which could also address the old paradox in seed research.
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