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  Primary carbohydrate metabolism genes participate in heat stress memory at the shoot apical meristem of Arabidopsis thaliana

Olas, J. J., Apelt, F., Annunziata, M. G., John, S., Richard, S. I., Gupta, S., et al. (2021). Primary carbohydrate metabolism genes participate in heat stress memory at the shoot apical meristem of Arabidopsis thaliana. Molecular Plant. doi:10.1016/j.molp.2021.05.024.

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 Creators:
Olas, Justyna Jadwiga1, Author
Apelt, Federico2, Author              
Annunziata, Maria Grazia3, Author              
John, S.4, Author              
Richard, Sarah Isabel1, Author
Gupta, S.2, Author              
Kragler, F.2, Author              
Balazadeh, S.5, Author              
Mueller-Roeber, B.4, Author              
Affiliations:
1external, ou_persistent22              
2Intercellular Macromolecular Transport, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753331              
3System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              
4Transcription Factors and Gene Regulatory Networks, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753316              
5Stress Control Networks, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_2435691              

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Free keywords: aldolase, carbon metabolism, heat stress, shoot apical meristem, thermomemory, thermopriming
 Abstract: In plants, the shoot apical meristem (SAM) is essential for the growth of above-ground organs. However, little is known about its molecular responses to abiotic stresses. Here, we show that the SAM of Arabidopsis thaliana displays an autonomous heat stress (HS) memory of a previous non-lethal HS, allowing the SAM to regain growth after exposure to an otherwise lethal HS several days later. Using RNA-seq, we identified genes participating in establishing the SAM’s HS transcriptional memory including the stem cell (SC) regulators CLAVATA1 (CLV1) and CLV3, HEAT SHOCK PROTEIN 17.6A (HSP17.6A), and primary carbohydrate metabolism gene FRUCTOSE-BISPHOSPHATE ALDOLASE 6 (FBA6). We demonstrate that sugar availability is essential for survival of plants at high temperature. HEAT SHOCK TRANSCRIPTION FACTOR A2 (HSFA2A) directly regulates expression of HSP17.6A and FBA6 by binding to heat shock elements in their promoters, demonstrating that HSFA2 is required for a transcriptional activation of SAM memory genes. Collectively, plants have evolved a sophisticated protection mechanism to maintain SC and, hence, their capacity to re-initiate shoot growth after stress release.

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Language(s): eng - English
 Dates: 2021-06-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

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Title: Molecular Plant
Source Genre: Journal
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Publ. Info: Oxford University Press
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 1674-2052
CoNE: https://pure.mpg.de/cone/journals/resource/1674-2052