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Amyloplasts are necessary for full gravitropism in thallus of Marchantia polymorpha.

Hashimoto-Sugimoto M, Norizuki T, Segami S, Ohta Y, Suetsugu N, Ueda T, Morita MT. · 2025 · Journal of experimental botany   research

doi:10.1093/jxb/eraf375   PMID:40827074   PMC12675261

Linked genes (7)  2 core 5 peripheral

Gene ID Name Evidence / Role Function (this paper)
Mp1g15530 MpAPS1 missing experimental subject Small subunit of ADP-glucose pyrophosphorylase; MpAPS1-Citrine localized to the plastid and Mpaps1-1ge/Mpaps1-2ge knockout mutants were generated, with reduced starch and amyloplasts impairing full gravitropism.
Mp4g13750 MpPGM1 experimental subject Phosphoglucomutase with a plastid transit peptide; MpPGM1-Citrine localized to the plastid and Mppgm1-1ge knockout mutants were generated, showing reduced starch/amyloplast formation and impaired thallus gravitropism.
MpEF1α missing experimental tool Used as a constitutive promoter to drive expression of Citrine-tagged starch biosynthesis genes for localization.
Mp2g11530 MpAPL1 missing sequence background ADP-glucose pyrophosphorylase large subunit gene identified by sequence analysis; not experimentally targeted.
Mp4g20740 MpAPL2 missing sequence background ADP-glucose pyrophosphorylase large subunit gene identified by sequence analysis; not experimentally targeted.
Mp4g10120 MpAPL3 missing sequence background ADP-glucose pyrophosphorylase large subunit gene identified by sequence analysis; not experimentally targeted.
Mp5g10560 MpPGM2 missing sequence background Cytosolic phosphoglucomutase homolog identified by sequence/phylogenetic analysis; lacks a plastid transit peptide and was not experimentally targeted.