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Does the memory of a first water deficit enable a more efficient response to a subsequent water deficit?

Abstract : In the current context of climate change, periods of water deficit occur more frequently along the crop cycle, leading to high yield losses. To limit the negative impact of recurrent water deficits, plants can adapt, via the mobilization of “stress memory”, allowing them to respond to a subsequent stress in a faster and/or more intensive manner. After a first stress event, plants can keep an imprint of this stress via the induction of epigenetic (e.g. memory gene regulation), physiological (e.g. stomatal closure) and molecular (e.g. compound accumulation) changes. When maintained between two stress periods, these changes may prepare plants for a subsequent water deficit. This work addresses the potential role of stress memory in plant adaptation to recurrent water deficits with a special focus on plant hydro-mineral uptake by roots. For this purpose, an experiment was conducted on the high throughput phenotyping platform (4PMI, Dijon, France), where several frequencies of water deficits were applied to pea plants. An integrative approach, including a structure-function ecophysiological framework characterizing plant hydromineral nutrition (nutrients and beneficial elements), enriched with root and nodule transcriptomic analyses (RNA-seq), revealed the mechanisms underlying the “memory effect” throughout the plant cycle. We will discuss the role of memory genes during recurrent stresses and plant strategies to acquire water as well as macro- and micro-nutrients more efficiently during recurrent stresses. This work offers the new perspective of considering plant memory in the design of ideotypes better adapted to multiple stress events in a context of climate change. Study conducted in the framework of the EAUPTIC project, supported by the “Fond Unique Interministériel" (n° 3870401/1), BPIFrance (n° DOS0097244/00), the Regional Council of Burgundy (n° DOS0133465/00), Dijon Metropole (n° CONV-DM2018-118-20180820), and the Fonds Européen de Développement Régional (n° 2018-6200FEO003S01889).
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https://hal.inrae.fr/hal-03320542
Contributor : Noureddine El Mjiyad <>
Submitted on : Monday, August 16, 2021 - 10:12:39 AM
Last modification on : Wednesday, September 1, 2021 - 11:39:52 AM

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  • HAL Id : hal-03320542, version 1

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Cécile Jacques, Sylvie Girodet, Jonathan Kreplak, Christophe Salon, Marion Prudent. Does the memory of a first water deficit enable a more efficient response to a subsequent water deficit?. Plant Science for Climate Emergency, Jun 2021, Virtuel, France. ⟨hal-03320542⟩

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