Codominant grasses differ in gene expression under experimental climate extremes in native tallgrass prairie

PeerJ
Ava M HoffmanMelinda D Smith

Abstract

Extremes in climate, such as heat waves and drought, are expected to become more frequent and intense with forecasted climate change. Plant species will almost certainly differ in their responses to these stressors. We experimentally imposed a heat wave and drought in the tallgrass prairie ecosystem near Manhattan, Kansas, USA to assess transcriptional responses of two ecologically important C4grass species,Andropogon gerardiiandSorghastrum nutans. Based on previous research, we expected thatS. nutanswould regulate more genes, particularly those related to stress response, under high heat and drought. Across all treatments,S. nutansshowed greater expression of negative regulatory and catabolism genes whileA. gerardiiupregulated cellular and protein metabolism. As predicted,S. nutansshowed greater sensitivity to water stress, particularly with downregulation of non-coding RNAs and upregulation of water stress and catabolism genes.A. gerardiiwas less sensitive to drought,althoughA. gerardiitended to respond with upregulation in response to drought versusS. nutanswhich downregulated more genes under drier conditions. Surprisingly,A. gerardiionly showed minimal gene expression response to increased temperature, whileS. nutansshowed...Continue Reading

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Citations

Feb 5, 2021·The New Phytologist·Jesse E GrayMelinda D Smith

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Datasets Mentioned

BETA
GPL4521

Methods Mentioned

BETA
RNA-seq
PCR
protein folding

Software Mentioned

GOSeq
WGCNA package for R
GenePix
Trinotate
Pfam
HMMER
R
Trinity
BLAST
BLASTN

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