BABA-Primed Histone Modifications in Potato for Intergenerational Resistance to Phytophthora infestans

Frontiers in Plant Science
Barbara MellerJolanta Floryszak-Wieczorek

Abstract

In this paper we analyzed β-aminobutyric acid (BABA)-primed epigenetic adjustment of potato cv. "Sarpo Mira" to Phytophthora infestans. The first stress-free generation of the potato genotype obtained from BABA-primed parent plants via tubers and seeds showed pronounced resistance to the pathogen, which was tuned with the transcriptional memory of SA-responsive genes. During the early priming phase before the triggering stress, we found robust bistable deposition of histone marks (H3K4me2 and H3K27me3) on the NPR1 (Non-expressor of PR genes) and the SNI1 gene (Suppressor of NPR1, Inducible), in which transcription antagonized silencing. Switchable chromatin states of these adverse systemic acquired resistance (SAR) regulators probably reprogrammed responsiveness of the PR1 and PR2 genes and contributed to stress imprinting. The elevated levels of heritable H3K4me2 tag in the absence of transcription on SA-dependent genes in BABA-primed (F0) and its vegetative and generative progeny (F1) before pathogen challenge provided evidence for the epigenetic mark for intergenerational memory in potato. Moreover, our study revealed that histone acetylation was not critical for maintaining BABA-primed defense information until the plants w...Continue Reading

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Citations

Jun 20, 2019·Frontiers in Plant Science·Daniel KuźnickiJolanta Floryszak-Wieczorek
Oct 15, 2020·International Journal of Molecular Sciences·Vasily V AshapkinBoris F Vanyushin
Mar 12, 2021·Plant Science : an International Journal of Experimental Plant Biology·Keren Martínez-AguilarRaúl Alvarez-Venegas
Jun 22, 2021·Frontiers in Plant Science·Pengfei Zhi, Cheng Chang

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Methods Mentioned

BETA
chemical treatment
acetylation
immunoprecipitation
PCR
Assay
ChIP
Histone Acetylation

Software Mentioned

ImageJ
Primer3 Output
PRIMER BLAST

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