Related Experiment Video
Updated: Sep 14, 2026

Isolation and Respiratory Measurements of Mitochondria from Arabidopsis thaliana
Published on: January 5, 2018
Evolutionary aspects of "chloroplast-like" trnN and trnH expression in higher-plant mitochondria
1Institut de Biologie Moléculaire des Plantes, UPRA0406 du CNRS, Université Louis Pasteur, 12 rue du Général Zimmer, F-67084 Strasbourg Cedex, France.
Abstract:
Two identical "chloroplast-like" tRNAAsn genes, trnN1 and trnN2, have been identified in the potato (Solanum tuberosum) mitochondrial genome. The flanking sequences of trnN1 are unrelated to the corresponding authentic potato chloroplast regions, whilst those of trnN2 are very similar to the chloroplast sequences. The trnN1 copy is present in the mitochondrial genome of various plants whereas the second copy, trnN2, is absent from all the other plant genomes studied so far. Interestingly, both trnN copies are expressed in potato mitochondria. Sequences flanking the chloroplast-like tRNAHis gene (trnH), present as a single copy in the potato mitochondrial DNA, are unrelated to the corresponding chloroplast sequences, whereas chloroplast-derived sequences have been maintained in the vicinity of the maize chloroplast-like mitochondrial trnH gene. However, both the potato and the maize trnH are expressed in mitochondria.
Related Concept Videos
Non-nuclear Inheritance
Animal Mitochondrial Genetics
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
Export of Mitochondrial and Chloroplast Genes
The Anatomy of Chloroplasts
Structure of Chloroplasts
A...
Protein Transport to the Inner Chloroplast Membrane

