Independent degradation in genes of the plastid ndh gene family in species of the orchid genus Cymbidium (Orchidaceae; Epidendroideae)
Fig 4
Alignment of ndh gene regions in Dendrobium catenatum and Epipogium aphyllum.
A red dotted-box indicates a plastome-like chondriome region. The plastid ndh genes of Sobralia callosa were used as reference. A) In contrast with plastid ndhJ-K-C region of D. catenatum, mt-ndhJ-K-C region was similar to the reference in length with the exception of deletion in mt-ndhK. B) Both plastid and mt-ndhF of D. catenatum contained large deletions. C) The plastid region of D. catenatum from downstream of rpl32 to downstream of 5′ end of ndhG was transferred to the chondriome. D) The ndhI-A-H region in the chondriome of D. catenatum has a mt-ndhI-A exon2 region that is inverted relative to the reference, whereas this region was completely deleted in the plastome. E) Plastome of E. aphyllum has completely deleted all 11 ndh genes, whereas its chondriome has retained an ndhI-A region; there was an inversion between 3′ region of ndhI and upstream of 5′ end ndhA exon2.