Dehydration stress memory

Gene networks linked to physiological responses during repeated stresses of zea mays

Laetitia Virlouvet, Thomas J. Avenson, Qian Du, Chi Zhang, Ning Liu, Michael Fromm, Zoya V Avramova, Sabrina E. Russo

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Stress memory refers to the observation that an initial, sub-lethal stress alters plants’ responses to subsequent stresses. Previous transcriptome analyses of maize seedlings exposed to a repeated dehydration stress has revealed the existence of transcriptional stress memory in Zea mays. Whether drought-related physiological responses also display memory and how transcriptional memory translates into physiological memory are fundamental questions that are still unanswered. Using a systems-biology approach we investigate whether/how transcription memory responses established in the genome-wide analysis of Z. mays correlate with 14 physiological parameters measured during a repeated exposure of maize seedlings to dehydration stress. Co-expression network analysis revealed ten gene modules correlating strongly with particular physiological processes, and one module displaying strong, yet divergent, correlations with several processes suggesting involvement of these genes in coordinated responses across networks. Two processes key to the drought response, stomatal conductance and non-photochemical quenching, displayed contrasting memory patterns that may reflect trade-offs related to metabolic costs versus benefits of cellular protection. The main contribution of this study is the demonstration of coordinated changes in transcription memory responses at the genome level and integrated physiological responses at the cellular level upon repetitive stress exposures. The results obtained by the network-based systems analysis challenge the commonly held view that short-term physiological responses to stress are primarily mediated biochemically.

Original languageEnglish (US)
Article number1058
JournalFrontiers in Plant Science
Volume9
DOIs
StatePublished - Jul 24 2018

Fingerprint

desiccation (plant physiology)
plant response
Zea mays
stress response
transcription (genetics)
drought
genome
corn
seedlings
gene regulatory networks
systems analysis
lethal genes
transcriptome
stomatal conductance
Biological Sciences

Keywords

  • Chlorophyll fluorescence
  • Drought
  • Gene co-expression networks
  • Non-photochemical quenching
  • Photosynthesis
  • Stomatal conductance
  • Stress memory

ASJC Scopus subject areas

  • Plant Science

Cite this

Dehydration stress memory : Gene networks linked to physiological responses during repeated stresses of zea mays. / Virlouvet, Laetitia; Avenson, Thomas J.; Du, Qian; Zhang, Chi; Liu, Ning; Fromm, Michael; Avramova, Zoya V; Russo, Sabrina E.

In: Frontiers in Plant Science, Vol. 9, 1058, 24.07.2018.

Research output: Contribution to journalArticle

Virlouvet, Laetitia ; Avenson, Thomas J. ; Du, Qian ; Zhang, Chi ; Liu, Ning ; Fromm, Michael ; Avramova, Zoya V ; Russo, Sabrina E. / Dehydration stress memory : Gene networks linked to physiological responses during repeated stresses of zea mays. In: Frontiers in Plant Science. 2018 ; Vol. 9.
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