نتایج جستجو برای: chloroplast genome

تعداد نتایج: 240489  

2013
Rong Li Peng-Fei Ma Jun Wen Ting-Shuang Yi

BACKGROUND The ginseng family (Araliaceae) includes a number of economically important plant species. Previously phylogenetic studies circumscribed three major clades within the core ginseng plant family, yet the internal relationships of each major group have been poorly resolved perhaps due to rapid radiation of these lineages. Recent studies have shown that phyogenomics based on chloroplast ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Taegun Kwon Enamul Huq David L Herrin

Chloroplast DNA (cpDNA) is under great photooxidative stress, yet its evolution is very conservative compared with nuclear or mitochondrial genomes. It can be expected that DNA repair mechanisms play important roles in cpDNA survival and evolution, but they are poorly understood. To gain insight into how the most severe form of DNA damage, a double-strand break (DSB), is repaired, we have devel...

2016
Gurusamy Raman SeonJoo Park

Ampelopsis brevipedunculata is an economically important plant that belongs to the Vitaceae family of angiosperms. The phylogenetic placement of Vitaceae is still unresolved. Recent phylogenetic studies suggested that it should be placed in various alternative families including Caryophyllaceae, asteraceae, Saxifragaceae, Dilleniaceae, or with the rest of the rosid families. However, these anal...

Journal: :Molecular biology and evolution 2009
Vadim V Goremykin Francesco Salamini Riccardo Velasco Roberto Viola

The mitochondrial genome of grape (Vitis vinifera), the largest organelle genome sequenced so far, is presented. The genome is 773,279 nt long and has the highest coding capacity among known angiosperm mitochondrial DNAs (mtDNAs). The proportion of promiscuous DNA of plastid origin in the genome is also the largest ever reported for an angiosperm mtDNA, both in absolute and relative terms. In a...

Journal: :Plant physiology 2013
Yukihiro Kabeya Shin-ya Miyagishima

Chloroplasts arose from a cyanobacterial endosymbiont and multiply by division. In algal cells, chloroplast division is regulated by the cell cycle so as to occur only once, in the S phase. Chloroplasts possess multiple copies of their own genome that must be replicated during chloroplast proliferation. In order to examine how chloroplast DNA replication is regulated in the green alga Chlamydom...

2015
Anna V. Williams Laura M. Boykin Katharine A. Howell Paul G. Nevill Ian Small

Legumes are a highly diverse angiosperm family that include many agriculturally important species. To date, 21 complete chloroplast genomes have been sequenced from legume crops confined to the Papilionoideae subfamily. Here we report the first chloroplast genome from the Mimosoideae, Acacia ligulata, and compare it to the previously sequenced legume genomes. The A. ligulata chloroplast genome ...

2014
Chu-Yu Ye Zhangxiang Lin Gengmi Li Ying-Ying Wang Jie Qiu Fei Fu Haiqiang Zhang Li Chen Sisi Ye Weijie Song Gulei Jin Jinwen Zhu Yongliang Lu Longbiao Guo Longjiang Fan

The genus Echinochloa (Poaceae) includes numerous problematic weeds that cause the reduction of crop yield worldwide. To date, DNA sequence information is still limited in the genus Echinochloa. In this study, we completed the entire chloroplast genomes of two Echinochloa species (Echinochloa oryzicola and Echinochloa crus-galli) based on high-throughput sequencing data from their fresh green l...

2016
Shuai Wang Ge Bai Shu Wang Leiyun Yang Fen Yang Yi Wang Jian-Kang Zhu Jian Hua

Plants have varying abilities to tolerate chilling (low but not freezing temperatures), and it is largely unknown how plants such as Arabidopsis thaliana achieve chilling tolerance. Here, we describe a genome-wide screen for genes important for chilling tolerance by their putative knockout mutants in Arabidopsis thaliana. Out of 11,000 T-DNA insertion mutant lines representing half of the genom...

2017
David R. Smith

There is a strong positive relationship between nuclear genome size and cell size across the eukaryotic domain, but the cause and effect of this relationship is unclear. A positive coupling of cell size and DNA content has also been recorded for various bacteria, suggesting that, with some exceptions, this association might be universal throughout the tree of life. However, the link between cel...

Journal: :PLoS ONE 2009
Bojian Zhong Takahiro Yonezawa Yang Zhong Masami Hasegawa

BACKGROUND It has been suggested that the chloroplast genomes of the grass family, Poaceae, have undergone an elevated evolutionary rate compared to most other angiosperms, yet the details of this phenomenon have remained obscure. To know how the rate change occurred during evolution, estimation of the time-scale with reliable calibrations is needed. The recent finding of 65 Ma grass phytoliths...

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