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UVR8- mediated induction of flavonoid biosynthesis for UVB tolerance is conserved between the liverwort Marchantia polymorpha and flowering plants.

Clayton, W. A., et al. · 2018 · Plant Journal   research

doi:10.1111/tpj.14044   PMID:30044520

Linked genes (44)  6 core 38 peripheral

Gene ID Name Evidence / Role Function (this paper)
Mp1g16800 MpBZIP1 experimental subject bZIP transcription factor (Mapoly0001s0021), central activator of the UVB response. CRISPR hy5 mutants were hypersensitive to UVB and failed to induce flavones; reduced RUP1 induction, supporting a conserved UVR8/HY5 pathway.
Mp6g05290 MpCHI experimental subject Chalcone isomerase (Mapoly0167s0012), second committed step of flavonoid biosynthesis. CRISPR chi mutants lacked detectable flavones and were strongly UVB-damaged, confirming flavones contribute to UVB tolerance.
Mp5g01410 MpCHIL experimental subject Chalcone isomerase-like protein (Mapoly0175s0004) needed for full flavonoid production. CRISPR chil mutants had reduced flavones and increased UVB-induced surface bronzing.
Mp5g19050 MpR2R3-MYB14 experimental subject R2R3-MYB activator of flavonoid biosynthesis (Mapoly0073s0038). UVB-induced; 35S:MpMYB14 overexpression line had increased flavone/riccionidin A content and increased UVB tolerance, while myb14 mutants resembled wild-type.
Mp2g18040 MpRUP experimental subject WD40 repressor (Mapoly0094s0072) providing negative feedback on the UVB response. CRISPR rup1 mutants had increased flavone content and were UVB-hyposensitive (stunted/dark green under prolonged UVB).
Mp2g11590 MpUVR8 experimental subject UVB photoreceptor (Mapoly0023s0125); marchantia UVR8 coding sequence overexpressed (35S:MpUVR8, W285A) to confirm UVR8/HY5 control of UVB responses; CRISPR knockout could not be obtained. UVR8OE transgenics had increased HY5/COP1/RUP1 and flavonoid-gene expression and higher flavone content.
Mp1g03260 Mp1g03260 missing experimental background UVB-induced DEG, serine hydrolase-related (annotation).
Mp1g12530 Mp1g12530 missing experimental background UVB-induced DEG, unknown function (annotation).
Mp1g15490 Mp1g15490 missing experimental background UVB-induced DEG, unknown function (annotation).
Mp1g22750 Mp1g22750 missing experimental background UVB-induced DEG, UV-B-induced protein (annotation).
Mp1g27830 Mp1g27830 missing experimental background UVB-induced DEG, probable chloroplastic GTP diphosphokinase (annotation).
Mp2g21620 Mp2g21620 missing experimental background UVB-induced DEG, chloroplastic acyltransferase-like protein (annotation).
Mp2g25900 Mp2g25900 missing experimental background UVB-induced metallochaperone, reduced induction in rup1 (annotation).
Mp3g08790 Mp3g08790 missing experimental background UVB-induced chloroplastic FTSH ATP-dependent zinc metalloprotease (annotation).
Mp3g13950 Mp3g13950 missing experimental background UVB-induced DEG, unknown function (annotation).
Mp4g19200 Mp4g19200 missing experimental background UVB-induced chloroplastic ATP-dependent zinc metalloprotease (annotation).
Mp5g14220 Mp5g14220 missing experimental background UVB-induced DEG, unknown function (annotation).
Mp5g19740 Mp5g19740 missing experimental background UVB-induced DEG, epoxide hydrolase/pheophytin pheophorbide hydrolase (annotation).
Mp6g04480 Mp6g04480 missing experimental background UVB-induced DEG, fatty acid desaturase (annotation).
Mp6g07750 Mp6g07750 missing experimental background UVB-induced DEG, unknown function (annotation).
Mp6g14520 Mp6g14520 missing experimental background UVB-induced ELIP1 (early light-induced protein 1), characteristic UVB-response gene (annotation).
Mp6g14930 Mp6g14930 missing experimental background UVB-induced chloroplastic FTSH ATP-dependent zinc metalloprotease (annotation).
Mp7g07880 Mp7g07880 missing experimental background HSP18 heat-shock protein, highest induction of any 1-day SHF gene (annotation).
Mp8g04680 Mp8g04680 missing experimental background UVB-induced ABC1-complex kinase, oxidative stress response (annotation).
Mp8g05750 Mp8g05750 missing experimental background UVB-induced DEG, pyridoxal 5'-phosphate synthase subunit (annotation).
Mp6g11030 MpABCI7 experimental background UVB-induced DEG, ABC-type transporter (annotation).
Mp2g00930 MpBHLH4 experimental background UVB-induced bHLH4 transcription factor (top At hits AtMYC4/AtTT8), function unknown (annotation).
Mp3g17080 MpCER1 experimental background UVB-induced DEG, probable alkane wax biosynthetic function (annotation).
Mp5g12010 MpCOP1 experimental background UVB-induced COP1 transcript in NanoString panel (annotation).
Mp8g00970 MpDET1 experimental background UVB-induced DET1 (DE-ETIOLATED-1), photomorphogenic component (annotation).
Mp2g01670 MpDOXC6 experimental background Strongly UVB-induced 2OGD DOXC38 dioxygenase, top BLAST hits F3H/FLS (annotation).
Mp1g13010 MpDUO1 experimental background UVB-induced MYB6 transcription factor, function unknown (annotation).
Mp1g26540 MpF3H experimental background Strongly UVB-induced 2OGD DOXC28 dioxygenase, sole marchantia DOXC28 gene (annotation).
Mp5g20580 MpIDS4 experimental background UVB-induced DEG, all-trans-nonaprenyl-diphosphate synthase (ubiquinone biosynthesis) (annotation).
Mp3g07510 MpMYB02 experimental background MYB2 transcript in NanoString panel, altered in rup1 (annotation).
Mp1g10150 MpPAL1 experimental background UVB-induced PAL transcript activated by MpMYB14 (annotation).
Mp7g14880 MpPAL3 experimental background UVB-induced PAL (phenylalanine ammonia lyase) flavonoid-pathway gene (annotation).
Mp4g10060 MpPAL8 experimental background UVB-induced PAL (phenylalanine ammonia lyase) flavonoid-pathway gene (annotation).
Mp4g21980 MpPKS/CHS-like2 experimental background UVB-induced CHS (chalcone synthase) flavonoid-pathway gene (annotation).
Mp4g14450 MpPKS12 experimental background UVB-induced CHS (chalcone synthase) flavonoid-pathway gene (annotation).
Mp2g07060 MpPKS7 experimental background UVB-induced CHS (chalcone synthase) flavonoid-pathway gene, activated by MpMYB14 (annotation).
Mp1g13160 MpPPR_16 experimental background UVB-induced DEG, chloroplastic polycistronic transcript processing (annotation).
Mp2g22560 MpR2R3-MYB13 experimental background MYB13 transcript in NanoString panel, altered in rup1 (annotation).
Mp3g02240 MpSIG5 experimental background UVB-induced DEG, RNA polymerase sigma factor RPO (annotation).