Enriched networks 'nucleoside/nucleotide and ribonucleoside/ribonucleotide metabolic processes' and 'response to stimulus' potentially conferred to drought adaptation of the epiphytic orchid Dendrobium wangliangii

Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology
Dake ZhaoGuangwan Hu

Abstract

Dendrobium wangliangii is an endangered and epiphytic orchid with tolerance to seasonally extreme arid conditions and occurs exclusively in the hot-dry valley area of southwestern China. To reveal its molecular basis responsible for ecological adaptation, large-scale transcriptome sequencing was performed using Illumina sequencing with pooled mRNA extracted from whole plants and pseudobulbs during drought and rainy seasons. Based on the target transcript selection, the differentially expressed genes were related to 8 well-known drought-tolerant categories, and to morphological traits in resistance to water stress including pseudobulbs and roots. Further gene ontology enrichment analysis revealed that 'nucleoside/nucleotide and ribonucleoside/ribonucleotide metabolic processes' and 'response to stimulus' were the two most important aspects in resistance to drought stress with respect to the whole plant. In addition, the difference in the number and category of differentially expressed genes in whole plant and stem suggested the involvement of genes specifically localized in the stem, such as GTP-binding protein, lipases, signaling related transcripts and those involved in the ATP metabolic process. The comprehensive analysis of ...Continue Reading

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Datasets Mentioned

BETA
PRJNA374407

Methods Mentioned

BETA
transgenic
electrophoresis
cDNA library construction
PCR
Illumina sequencing
environmental stress
endotransglucosylases

Software Mentioned

R
EdgeR
topGO
BLAST2GO
Adobe
PowerPoint
BlastP
Illumina HCS
RSEM
Trinity

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