Moritz Graeff
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View article: A phosphoinositide hub connects CLE peptide signaling and polar auxin efflux regulation
A phosphoinositide hub connects CLE peptide signaling and polar auxin efflux regulation Open
Auxin efflux through plasma-membrane-integral PIN-FORMED (PIN) carriers is essential for plant tissue organization and tightly regulated. For instance, a molecular rheostat critically controls PIN-mediated auxin transport in developing pro…
View article: Metaphloem development in the <i>Arabidopsis</i> root tip
Metaphloem development in the <i>Arabidopsis</i> root tip Open
The phloem transport network is a major evolutionary innovation that enabled plants to dominate terrestrial ecosystems. In the growth apices, the meristems, apical stem cells continuously produce early ‘protophloem’. This is easily observe…
View article: A microProtein repressor complex in the shoot meristem controls the transition to flowering
A microProtein repressor complex in the shoot meristem controls the transition to flowering Open
MicroProteins are potent post-translational regulators. In Arabidopsis (Arabidopsis thaliana), the miP1a/b microProteins delay floral transition by forming a complex with CONSTANS (CO) and the co-repressor protein TOPLESS. To better unders…
View article: Metaphloem development in the Arabidopsis root tip
Metaphloem development in the Arabidopsis root tip Open
The phloem transport network is a major evolutionary innovation that enabled plants to dominate terrestrial ecosystems. In the growth apices, the meristems, apical stem cells continuously produce early, so-called protophloem. This is easil…
View article: A morpho-transcriptomic map of brassinosteroid action in the Arabidopsis root
A morpho-transcriptomic map of brassinosteroid action in the Arabidopsis root Open
The effects of brassinosteroid signaling on shoot and root development have been characterized in great detail but did not identify a simple consistent positive or negative impact on a basic cellular parameter that would comprehensively ex…
View article: Conditional effects of the epigenetic regulator JUMONJI 14 in <i>Arabidopsis</i> root growth
Conditional effects of the epigenetic regulator JUMONJI 14 in <i>Arabidopsis</i> root growth Open
Methylation of lysine 4 in histone 3 (H3K4) is a post-translational modification that promotes gene expression. H3K4 methylation can be reversed by specific demethylases with an enzymatic Jumonji C domain. In Arabidopsis thaliana, H3K4-spe…
View article: A Cellular Insulator against CLE45 Peptide Signaling
A Cellular Insulator against CLE45 Peptide Signaling Open
Plants continuously elaborate their bodies through post-embryonic, reiterative organ formation by apical meristems [1]. Meristems harbor stem cells, which produce daughter cells that divide repeatedly before they differentiate. How transit…
View article: Dissection of the microProtein miP1 floral repressor complex in Arabidopsis
Dissection of the microProtein miP1 floral repressor complex in Arabidopsis Open
SUMMARY MicroProteins have emerged as potent regulators of transcription factor activity. Here we use a combination of forward genetics and proteomics to dissect the miP1a/b microProtein complex that acts to delay the floral transition in …
View article: Regulation of <i>MIR165/166</i> by class II and class III homeodomain leucine zipper proteins establishes leaf polarity
Regulation of <i>MIR165/166</i> by class II and class III homeodomain leucine zipper proteins establishes leaf polarity Open
Significance Leaves, being the prime photosynthetic organ of plants, are critical in many ways to our current biosphere. A defining characteristic, which also optimizes their function, is their flat shape that depends on the correct patter…
View article: MicroProteins in the Regulation of Flowering Time
MicroProteins in the Regulation of Flowering Time Open
Plants are, as sessile organisms, highly dependent on their ability to adapt to an ever changing environment. In order to do so they developed a remarkable variety of regulatory networks which enable them to perceive, integrate and adapt t…
View article: MicroProtein-Mediated Recruitment of CONSTANS into a TOPLESS Trimeric Complex Represses Flowering in Arabidopsis
MicroProtein-Mediated Recruitment of CONSTANS into a TOPLESS Trimeric Complex Represses Flowering in Arabidopsis Open
MicroProteins are short, single domain proteins that act by sequestering larger, multi-domain proteins into non-functional complexes. MicroProteins have been identified in plants and animals, where they are mostly involved in the regulatio…