title: Different gene-specific mechanisms determine the 'revised-response' memory transcription patterns of a subset of A. thaliana dehydration stress responding genes.
abstract: Plants that have experienced several exposures to dehydration stress show increased resistance to future exposures by producing faster and/or stronger reactions, while many dehydration stress responding genes in Arabidopsis thaliana super-induce their transcription as a 'memory' from the previous encounter. A previously unknown, rather unusual, memory response pattern is displayed by a subset of the dehydration stress response genes. Despite robustly responding to a first stress, these genes return to their initial, pre-stressed, transcript levels during the watered recovery; surprisingly, they do not respond further to subsequent stresses of similar magnitude and duration. This transcriptional behavior defines the 'revised-response' memory genes. Here, we investigate the molecular mechanisms regulating this transcription memory behavior. Potential roles of abscisic acid (ABA), of transcription factors (TFs) from the ABA signaling pathways (ABF2/3/4 and MYC2), and of histone modifications (H3K4me3 and H3K27me3) as factors in the revised-response transcription memory patterns are elucidated. We identify the TF MYC2 as the critical component for the memory behavior of a specific subset of MYC2-dependent genes.
authors.affiliation: University of Nebraska School of Biological Sciences, 1901 Vine Street, Lincoln, NE 68588, USA.
authors.forename: Ning
authors.initials: N
authors.lastname: Liu
authors.affiliation: University of Nebraska School of Biological Sciences, 1901 Vine Street, Lincoln, NE 68588, USA School of Life Sciences, University of Science & Technology of China, 443 Huangshang Road, Hefei, Anhui 230027, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Ding
authors.affiliation: University of Nebraska Center for Biotechnology and Center for Plant Science Innovation, 1901 Vine Street, Lincoln, NE 68588, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Fromm
authors.affiliation: University of Nebraska School of Biological Sciences, 1901 Vine Street, Lincoln, NE 68588, USA zavramova2@unl.edu.
authors.forename: Zoya
authors.initials: Z
authors.lastname: Avramova
mesh_terms: D000040:Abscisic Acid / Q000502:physiology; D000222:Adaptation, Physiological; D017360:Arabidopsis / Q000235:genetics* / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors / Q000235:genetics / Q000378:metabolism; D002843:Chromatin / Q000235:genetics / Q000378:metabolism; D004257:DNA Polymerase II / Q000235:genetics / Q000378:metabolism; D003681:Dehydration; D044127:Epigenesis, Genetic; D018506:Gene Expression Regulation, Plant; D006657:Histones / Q000378:metabolism; D010937:Plant Growth Regulators / Q000502:physiology; D013312:Stress, Physiological / Q000235:genetics*; D014158:Transcription, Genetic
chemical_list: D029681:Arabidopsis Proteins; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D002843:Chromatin; D006657:Histones; C473611:MYC2 protein, Arabidopsis; D010937:Plant Growth Regulators; D000040:Abscisic Acid; D004257:DNA Polymerase II
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