Deciphering energy-associated gene networks operating in the response of Arabidopsis plants to stress and nutritional cues

Tamar Avin-Wittenberg, Vered Tzin, Ruthie Angelovici, Hadar Less, Gad Galili

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Plants need to continuously adjust their transcriptome in response to various stresses that lead to inhibition of photosynthesis and the deprivation of cellular energy. This adjustment is triggered in part by a coordinated re-programming of the energy-associated transcriptome to slow down photosynthesis and activate other energy-promoting gene networks. Therefore, understanding the stress-related transcriptional networks of genes belonging to energy-associated pathways is of major importance for engineering stress tolerance. In a bioinformatics approach developed by our group, termed 'gene coordination', we previously divided genes encoding for enzymes and transcription factors in Arabidopsis thaliana into three clusters, displaying altered coordinated transcriptional behaviors in response to multiple biotic and abiotic stresses (Plant Cell, 23, 2011, 1264). Enrichment analysis indicated further that genes controlling energy-associated metabolism operate as a compound network in response to stress. In the present paper, we describe in detail the network association of genes belonging to six central energy-associated pathways in each of these three clusters described in our previous paper. Our results expose extensive stress-associated intra- and inter-pathway interactions between genes from these pathways, indicating that genes encoding proteins involved in energy-associated metabolism are expressed in a highly coordinated manner. We also provide examples showing that this approach can be further utilized to elucidate candidate genes for stress tolerance and functions of isozymes.

Original languageEnglish
Pages (from-to)954-966
Number of pages13
JournalPlant Journal
Volume70
Issue number6
DOIs
StatePublished - 1 Jun 2012
Externally publishedYes

Keywords

  • Arabidopsisthaliana
  • bioinformatics
  • coordination
  • energy
  • network
  • stress

ASJC Scopus subject areas

  • Genetics
  • Plant Science
  • Cell Biology

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