Thermopriming Triggers Splicing Memory in Arabidopsis

Yu Ling, Natalia Lorena Gorron Serano, Ge Gao, Mohamed Atia, Morad Mokhtar, Yong Woo, Jeremie Bazin, Alaguraj Veluchamy, Moussa Benhamed, Martin Crespi, Christoph A Gehring, A S N Reddy, Magdy M. Mahfouz

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Abiotic and biotic stresses limit crop productivity. Exposure to a non-lethal stress, referred to as priming, can allow plants to survive subsequent and otherwise lethal conditions; the priming effect persists even after a prolonged stress-free period. However, the molecular mechanisms underlying priming are not fully understood. Here, we investigated the molecular basis of heat shock memory and the role of priming in Arabidopsisthaliana. Comprehensive analysis of transcriptome-wide changes in gene expression and alternative splicing in primed and non-primed plants revealed that alternative splicing functions as a novel component of heat shock memory. We show that priming of plants with a non-lethal heat stress results in de-repression of splicing after a second exposure to heat stress. By contrast, non-primed plants showed significant repression of splicing. These observations link ‘splicing memory’ to the ability of plants to survive subsequent and otherwise lethal heat stress. This newly discovered priming-induced splicing memory may represent a general feature of heat stress responses in plants and other organisms as many of the key components of heat shock responses are conserved among eukaryotes. Furthermore, this finding could facilitate the development of novel approaches to improve plant survival under extreme heat stress.
Original languageEnglish (US)
Pages (from-to)2659-2675
Number of pages17
JournalJournal of Experimental Botany
Volume69
Issue number10
DOIs
StatePublished - Feb 27 2018

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