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MtABCG40 is a cytokinin transporter that limits lateral root density and nodule formation in Medicago truncatula

cris.virtual.author-orcid0000-0003-4445-5624
cris.virtual.author-orcid0000-0002-9535-7306
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cris.virtual.author-orcid0000-0003-0904-5873
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cris.virtualsource.author-orcid36fc7bfc-89c8-4648-af52-05dd31161d2f
cris.virtualsource.author-orcidbfa5ef69-3b47-4c53-a56b-3aff82a20b9d
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cris.virtualsource.author-orcide640ca9f-806b-4fe6-becb-615098483165
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dc.abstract.enNumerous studies have already demonstrated that cytokinin (CK) distribution plays a pivotal role in shaping plant morphology in response to environmental changes. However, the contribution of short-distance CK translocation to root mineral nutrition remains poorly understood, and the specific roles of CK transporters in root morphology are still unclear. Identifying the molecular identity of CK transporters is, therefore, essential for advancing our understanding of root plasticity, under varying soil fertility conditions and common nutritional deficiencies. In this study, we identified and characterised MtABCG40, a full-size ATP-binding cassette (ABC) transporter of the G subfamily in Medicago truncatula, as a CK transporter. MtABCG40 expression is root-specific, and it is induced both by nitrogen deficiency and CK treatment. We propose that MtABCG40 mediates the lateral translocation of CKs from the xylem to surrounding cells, giving rise to lateral organs, and thereby influencing root morphology, by suppressing the lateral root and nodule formation under nitrogen-limited conditions. Furthermore, MtABCG40 reduces apoplastic CK concentrations in the root meristematic zone, lowering the responsiveness of the root apical meristem to CKs. In summary, the activity of MtABCG40 indirectly influences CK perception and, consequently, modulates auxin-mediated cellular responses.
dc.affiliationWydział Rolnictwa, Ogrodnictwa i Biotechnologii
dc.affiliation.instituteKatedra Biochemii i Biotechnologii
dc.contributor.authorJamruszka, Tomasz
dc.contributor.authorBanasiak, Joanna
dc.contributor.authorPawela, Aleksandra
dc.contributor.authorJarzyniak, Karolina Maria
dc.contributor.authorXia, Jian
dc.contributor.authorBiała‐Leonhard, Wanda
dc.contributor.authorPlačková, Lenka
dc.contributor.authorTsering, Tashi
dc.contributor.authorIacobini, Francesca Romana
dc.contributor.authorNovák, Ondřej
dc.contributor.authorGeisler, Markus M.
dc.contributor.authorJasiński, Michał
dc.date.accessioned2025-12-10T14:29:52Z
dc.date.available2025-12-10T14:29:52Z
dc.date.issued2025
dc.description.abstract<jats:title>SUMMARY</jats:title> <jats:p> Numerous studies have already demonstrated that cytokinin (CK) distribution plays a pivotal role in shaping plant morphology in response to environmental changes. However, the contribution of short‐distance CK translocation to root mineral nutrition remains poorly understood, and the specific roles of CK transporters in root morphology are still unclear. Identifying the molecular identity of CK transporters is, therefore, essential for advancing our understanding of root plasticity, under varying soil fertility conditions and common nutritional deficiencies. In this study, we identified and characterised MtABCG40, a full‐size ATP‐binding cassette (ABC) transporter of the G subfamily in <jats:italic>Medicago truncatula</jats:italic> , as a CK transporter. <jats:italic>MtABCG40</jats:italic> expression is root‐specific, and it is induced both by nitrogen deficiency and CK treatment. We propose that MtABCG40 mediates the lateral translocation of CKs from the xylem to surrounding cells, giving rise to lateral organs, and thereby influencing root morphology, by suppressing the lateral root and nodule formation under nitrogen‐limited conditions. Furthermore, MtABCG40 reduces apoplastic CK concentrations in the root meristematic zone, lowering the responsiveness of the root apical meristem to CKs. In summary, the activity of MtABCG40 indirectly influences CK perception and, consequently, modulates auxin‐mediated cellular responses. </jats:p>
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if5,7
dc.description.number5
dc.description.points140
dc.description.volume124
dc.identifier.doi10.1111/tpj.70622
dc.identifier.eissn1365-313X
dc.identifier.issn0960-7412
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/6330
dc.languageen
dc.relation.ispartofPlant Journal
dc.relation.pagese70622
dc.rightsClosedAccess
dc.sciencecloudsend
dc.subject.enABCG transporters
dc.subject.encytokinin
dc.subject.enlateral root
dc.subject.ennodulation
dc.subject.enroot apical meristem
dc.subject.enroot morphology
dc.titleMtABCG40 is a cytokinin transporter that limits lateral root density and nodule formation in Medicago truncatula
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.issue5
oaire.citation.volume124