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- W3210948462 abstract "Abstract Endosymbiotic association between hornworts and dinitrogen-fixing cyanobacteria form when the plant is limited for combined nitrogen (N). We generated RNA-Seq data to examine the temporal gene expression patterns during culture of N-starved Anthoceros punctatus in the absence and presence of the symbiotically competent cyanobacterium Nostoc punctiforme . Symbiotic nitrogenase activity commenced within 5 days of coculture reaching a maximal by 14 days. In symbiont-free gametophytes, chlorophyll content, chlorophyll fluorescence characteristics and transcription of genes encoding light harvesting and reaction center proteins, as well as the small subunit of ribulose-bisphosphate-carboxylase/oxygenase, were downregulated. The downregulation was complemented in a temporal pattern corresponding to the N . punctiforme provision of N 2 -derived ammonium. The impairment and complementation of photosynthesis was the most distinctive response of A . punctatus to N-starvation. Increases in transcription of ammonium and nitrate transporters and their N . punctiforme -dependent complementation was also observed. The temporal patterns of differential gene expression indicated N . punctiforme transmits signals to A . punctatus both prior to, and after its provision of fixed N. This is the only known temporal transcriptomic study during establishment of a symbiotic nitrogen-fixing association in this monophyletic evolutionary lineage of land plants. Highlights Temporal RNA-Seq analysis revealed how symbiotic cyanobacteria impact plant partners’ global gene expression and elucidated the nature of bidirectional communications between the partners" @default.
- W3210948462 created "2021-11-08" @default.
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- W3210948462 date "2021-10-27" @default.
- W3210948462 modified "2023-10-13" @default.
- W3210948462 title "<i>Nostoc</i> talks back: Temporal patterns of differential gene expression during establishment of the <i>Anthoceros-Nostoc</i> symbiosis" @default.
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- W3210948462 doi "https://doi.org/10.1101/2021.10.27.465970" @default.
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