ArticleNature communications2025
KAI2-dependent signaling controls vegetative reproduction in Marchantia polymorpha through activation of LOG-mediated cytokinin synthesis (14).
Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Towards an integrated molecular understanding of plant hormones.Journal of integrative plant biology · 2026Review
- Review
- Initiation of asexual reproduction by the AP2/ERF gene GEMMIFER in Marchantia polymorpha.Current biology : CB · 2026Article
- B-GATA factors are required for nitrogen-responsive growth in Physcomitrium patens and Arabidopsis thaliana.The New phytologist · 2026Article
- SHOT GLASS, an R2R3-MYB transcription factor, promotes gemma cup and gametangiophore development in Marchantia polymorpha.The New phytologist · 2025Article
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9 authors.
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Abstract
Marchantia polymorpha reproduces vegetatively (asexually) by producing propagules known as gemmae within gemma cups and sexually through spores. We previously reported that KARRIKIN INSENSITIVE2 (KAI2)-dependent signaling promotes gemma cup and gemma formation. KAI2A perceives unidentified endogenous ligand(s), tentatively referred to as KAI2 ligands (KL). Perception of KL by KAI2 triggers MORE AXILLARY GROWTH2 (MAX2)-dependent proteolysis of MpSUPPRESSOR of MORE AXILLALRY GROWTH2 1-LIKE (MpSMXL). In this study, we identify genes working downstream of KAI2-dependent signaling in M. polymorpha. We find that KAI2-dependent signaling positively controls the expression of MpLONELY GUY (MpLOG), encoding a cytokinin biosynthesis enzyme. Disruption of the MpLOG function decreases endogenous cytokinin levels and causes defects similar to KAI2-dependent signaling mutants. Moreover, supplying exogenous cytokinins rescues the defects of Mplog and KAI2-dependent signaling mutants, implying that cytokinins work downstream of KAI2-dependent signaling. Activation of MpLOG by KAI2-dependent signaling occurs in a highly cell-type-specific manner, leading to cell-specific induction of GEMMA CUP-ASSOCIATED MYB1 (GCAM1), the master regulator of vegetative reproduction of M. polymorpha. We propose a genetic cascade, starting from KAI2-dependent signaling, that promotes vegetative reproduction through the induction of MpLOG and GCAM1. The interaction between KAI2-dependent signaling and cytokinin in M. polymorpha provides insights into the function and evolution of KAI2-dependent signaling.
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