Dem IPB wird erneut ein beispielhaftes Handeln im Sinne einer chancengleichheitsorientierten Personal- und Organisationspolitik bescheinigt. Das Institut erhält zum 6. Mal in Folge das TOTAL E-QUALITY…
Die Plant Science Student Conference (PSSC) wird seit 20 Jahren im jährlichen Wechsel von Studierenden der beiden Leibniz-Institute IPK und IPB organisiert. Im Interview erläutern Christina Wäsch…
Bittner, A.; Hause, B.; Baier, M.;Cold-priming causes oxylipin dampening during the early cold and light response of Arabidopsis thalianaJ. Exp. Bot.727163-7179(2021)DOI: 10.1093/jxb/erab314
Abstract
The comparison of transcriptome time-courses of the first 2 h of the cold or highlight response of 24 h cold primed and naive Arabidopsis thaliana showed that priming quickly modifies gene expression in a trigger-specific manner. It dampened up- as well as down-regulation of genes in the cold and in the light. 1/3 of the priming-regulated genes were jasmonate sensitive, including the full set of genes required for oxylipin biosynthesis. qPCR-based analysis in wildtype plants and mutants demonstrated that OPDA (12-oxo phytenoic acid) biosynthesis relative to the jasmonic acid (JA) availability controls dampening of the genes for oxylipin biosynthetic enzymes: Gene regulation in oxylipin biosynthesis mutants more strongly depended on the biosynthesis of the JA precursor OPDA than on its conversion to JA. Additionally, priming-dependent dampening during triggering was more linked to OPDA than to JA level regulation and spray application of OPDA prior to triggering counteracted gene dampening. In contrast to cold-priming induced dampening of ZAT10, priming regulation of the oxylipin hub was insensitive to priming-induced accumulation of thylakoid ascorbate peroxidase and mediated by modulation of the oxylipin sensitivity of genes for OPDA biosynthesis.