Increased accumulation of intron-containing transcripts in rice mitochondria caused by low temperature: is cold-sensitive RNA editing implicated?

An increase in the unspliced cox2 transcript and accompanying decrease in the frequency of RNA editing near the exon/intron junction (intron binding site 1, IBS1) have been reported in cold-treated wheat. Here, an attempt was made to clarify whether a similar phenomenon occurs in rice. Levels of unspliced cox2 transcript increased and its editing at the IBS was abolished after cold treatment.