Organellar genome divergence and environmental stress induce transcriptional cytonuclear responses in wheat alloplasmic hybrids
Abstract
The union of two or more different nuclear genomes with maternally inherited organellar genomes may lead to cytonuclear incompatibilities in plant allopolyploids. These incompatibilities may be reconciled by coevolutionary responses at the genomic and transcriptional levels. To date, the relationship between extent of divergence among parental organellar genomes and cytonuclear coevolutionary responses remains largely unexplored. Here, we studied transcriptional cytonuclear expression in synthetic alloplasmic allohexaploid wheat lines having the same nuclear subgenomic composition (the nuclear genome of Chinese Spring) but with varying cytoplasmic organelles (plasmon donors from B- and D- lineage Triticum/Aegilops species). A positive association between the extent of plastid organellar divergence from naturally occurring organelles in euplasmic Chinese Spring and transcriptional cytonuclear responses was observed. This response was enhanced under stress (highlight) treatment and was determined to be related to differential subgenomic methylation levels. These data comprise a transcriptional dimension of cytonuclear responses to polyploidy and point to a potentially responsible epigenomic regulatory mechanism.
Article Details
Journal Info
Proceedings of the National Academy of Sciences
National Academy of Sciences
Authors (19)
Yue Zhao
Keren Zhang
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Guo Li
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Yuming Wang
Xiaoyang Ding
Soybean Research Institute, Jilin Academy of Agricultural Sciences
Shuo Wang
Xi Pang
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Xueru Zhao
Chemistry Department
Yue Yu
Jiaqi Liu
Tingting Yu
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Guixian Bao
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Tianya Wang
Key Laboratory of Molecular Epigenetics of the Ministry of Education, Northeast Normal University
Zhongfu Ni
Frontiers Science Center for Molecular Design Breeding, Key Laboratory of crop Heterosis and Utilization, and Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Mingming Xin
Frontiers Science Center for Molecular Design Breeding, Key Laboratory of crop Heterosis and Utilization, and Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University
Bao Liu
Automotive Engineering Research Institute
Jonathan F. Wendel
Department of Ecology, Evolution and Organismal Biology, Iowa State University
Zhibin Zhang
State Key Laboratory for Mesoscopic Physics, Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, China.
Lei Gong
College of Chemistry and Chemical Engineering