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The Rab Geranylgeranyl Transferase Beta Subunit Is Essential for Embryo and Seed Development in Arabidopsis thaliana.

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cris.lastimport.scopus2024-02-12T20:17:37Z
dc.abstract.enAuxin is a key regulator of plant development affecting the formation and maturation of reproductive structures. The apoplastic route of auxin transport engages influx and efflux facilitators from the PIN, AUX and ABCB families. The polar localization of these proteins and constant recycling from the plasma membrane to endosomes is dependent on Rab-mediated vesicular traffic. Rab proteins are anchored to membranes via posttranslational addition of two geranylgeranyl moieties by the Rab Geranylgeranyl Transferase enzyme (RGT), which consists of RGTA, RGTB and REP subunits. Here, we present data showing that seed development in the rgtb1 mutant, with decreased vesicular transport capacity, is disturbed. Both pre- and post-fertilization events are affected, leading to a decrease in seed yield. Pollen tube recognition at the stigma and its guidance to the micropyle is compromised and the seed coat forms incorrectly. Excess auxin in the sporophytic tissues of the ovule in the rgtb1 plants leads to an increased tendency of autonomous endosperm formation in unfertilized ovules and influences embryo development in a maternal sporophytic manner. The results show the importance of vesicular traffic for sexual reproduction in flowering plants, and highlight RGTB1 as a key component of sporophytic-filial signaling.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorRychłowski, Michał
dc.contributor.authorTucker, Matthew R.
dc.contributor.authorRojek, Joanna
dc.contributor.authorGutkowska-Stronkowska, Małgorzata
dc.contributor.authorNowakowska, Julita
dc.date.accessioned2024-01-26T10:36:41Z
dc.date.available2024-01-26T10:36:41Z
dc.date.copyright2021-07-24
dc.date.issued2021
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number15
dc.description.versionFINAL_PUBLISHED
dc.description.volume22
dc.identifier.doi10.3390/IJMS22157907
dc.identifier.issn1422-0067
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122934
dc.identifier.weblinkhttps://www.mdpi.com/1422-0067/22/15/7907/pdf
dc.languageeng
dc.pbn.affiliationbiological sciences
dc.relation.ispartofInternational Journal of Molecular Sciences
dc.relation.pages7907 (1-26)
dc.rightsCC-BY
dc.sciencecloudnosend
dc.subject.enArabidopsis
dc.subject.enauxin
dc.subject.enembryo
dc.subject.enendosperm
dc.subject.enPIN1
dc.subject.enRab
dc.subject.enRab Geranylgeranyl Transferase
dc.subject.enseed
dc.subject.enseed coat
dc.titleThe Rab Geranylgeranyl Transferase Beta Subunit Is Essential for Embryo and Seed Development in Arabidopsis thaliana.
dc.typeJournalArticle
dspace.entity.typePublication