Fig. 9

Auxin and JA signal transduction pathways are synergistically involved in the regulation of pollen fertility stability under HT stress. A Differentially expressed genes (DEGs) and differential metabolite in the auxin signal transduction pathway. B Relative content of indoleacetic acid. (C, D) Heat maps showing expression levels of DEGs involved in auxin signal transduction. E DEGs and differential metabolite in the JA signal transduction pathway. F Relative contents of JA and methyl jasmonate. G, H Heat maps showing expression levels of DEGs involved in JA signal transduction and indole alkaloid biosynthesis pathways. Green solid circles and red rectangular boxes indicate differential metabolites and DEGs, respectively. AP_NH, NH under mild HT stress; AP_SH, SH under mild HT stress; JP_NH, NH under extreme HT stress; JP_SH, SH under extreme HT stress