Cold-priming of chloroplast ROS signalling is developmentally regulated and is locally controlled at the thylakoid membrane

Scientific Reports
Jörn van BuerMargarete Baier

Abstract

24 h exposure to 4 °C primes Arabidopsis thaliana in the pre-bolting rosette stage for several days against full cold activation of the ROS responsive genes ZAT10 and BAP1 and causes stronger cold-induction of pleiotropically stress-regulated genes. Transient over-expression of thylakoid ascorbate peroxidase (tAPX) at 20 °C mimicked and tAPX transcript silencing antagonized cold-priming of ZAT10 expression. The tAPX effect could not be replaced by over-expression of stromal ascorbate peroxidase (sAPX) demonstrating that priming is specific to regulation of tAPX availability and, consequently, regulated locally at the thylakoid membrane. Arabidopsis acquired cold primability in the early rosette stage between 2 and 4 weeks. During further rosette development, primability was widely maintained in the oldest leaves. Later formed and later maturing leaves were not primable demonstrating that priming is stronger regulated with plant age than with leaf age. In 4-week-old plants, which were strongest primable, the memory was fully erasable and lost seven days after priming. In summary, we conclude that cold-priming of chloroplast-to-nucleus ROS signalling by transient post-stress induction of tAPX transcription is a strategy to modify...Continue Reading

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Citations

Jun 20, 2020·BMC Plant Biology·Andras BittnerMargarete Baier
Nov 14, 2019·Plants·Martín L MaytaAnabella F Lodeyro
Jan 22, 2020·Scientific Reports·Jan Erik LeuendorfThomas Schmülling
Feb 6, 2021·International Journal of Molecular Sciences·Fiaz RasulBernd Mueller-Roeber
May 8, 2021·Biological Reviews of the Cambridge Philosophical Society·Ashish Kumar SrivastavaPenna Suprasanna

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Methods Mentioned

BETA
environmental stress
transgenic
PCR

Software Mentioned

R
SPSS23
Perligran
QUANTPRIME

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