Asset Details
Do you wish to reserve the book?
Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)
Do you wish to request the book?
Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Analysis of six chloroplast genomes provides insight into the evolution of Chrysosplenium (Saxifragaceae)
2020
Overview
Background
Chrysosplenium
L. (Saxifragaceae) is a genus of plants widely distributed in Northern Hemisphere and usually found in moist, shaded valleys and mountain slopes. This genus is ideal for studying plant adaptation to low light conditions. Although some progress has been made in the systematics and biogeography of
Chrysosplenium
, its chloroplast genome evolution remains to be investigated.
Results
To fill this gap, we sequenced the chloroplast genomes of six
Chrysosplenium
species and analyzed their genome structure, GC content, and nucleotide diversity. Moreover, we performed a phylogenetic analysis and calculated non-synonymous (Ka) /synonymous (Ks) substitution ratios using the combined protein-coding genes of 29 species within Saxifragales and two additional species as outgroups, as well as a pair-wise estimation for each gene within
Chrysosplenium
. Compared with the outgroups in Saxifragaceae, the six
Chrysosplenium
chloroplast genomes had lower GC contents; they also had conserved boundary regions and gene contents, as only the
rpl32
gene was lost in four of the
Chrysosplenium
chloroplast genomes. Phylogenetic analyses suggested that the
Chrysosplenium
separated to two major clades (the opposite group and the alternate group). The selection pressure estimation (Ka/Ks ratios) of genes in the
Chrysosplenium
species showed that
matK
and
ycf2
were subjected to positive selection.
Conclusion
This study provides genetic resources for exploring the phylogeny of
Chrysosplenium
and sheds light on plant adaptation to low light conditions. The lower average GC content and the lacking gene of
rpl32
indicated selective pressure in their unique habitats. Different from results previously reported, our selective pressure estimation suggested that the genes related to photosynthesis (such as
ycf2
) were under positive selection at sites in the coding region.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
