Origin and evolution of chloroplast group I introns in lichen algae.

The history of group I introns is characterized by repeated horizontal transfers, even among phylogenetically distant species. The symbiogenetic thalli of lichens are good candidates for the horizontal transfer of genetic material among distantly related organisms, such as fungi and green algae. The main goal of this study was to determine whether there were different trends in intron distribution and properties among Chlorophyte algae based on their phylogenetic relationships and living conditions.

RETRACTED: Posttranscriptional processing of the ndhCKJ operon of barley chloroplasts: Cotranscription and coprocessing with the trnV gene.

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Characterization of the 5'- and 3'-ends of mRNAs of ndhH, ndhA and ndhI genes of the plastid ndhH-D operon.

The monocistronic mRNAs of ndhH and ndhA genes of the plastid ndhH-D operon accumulate during senescence. In a step forward to discover the mechanisms involved in the production of mature transcripts of the ndhH-D operon, we determined the 5 - and 3 -ends of low-molecular-weight ndhH, ndhA and ndhI transcripts of barley. The 3'-end of the only ndhH mRNA detected (1622 b) extends 421 b into exon1 of ndhA.