...Sjoerd Woudenberg; Melissa Dipp Alvarez; Juriaan Rienstra; Victor Levitsky; Victoria Mironova; Enrico Scarpella; Andre Kuhn; Dolf Weijers ABSTRACT The auxin signaling molecule regulates a range of plant growth and developmental processes. The core transcriptional machinery responsible for auxin...

... redundantly regulate columella stem cell fate and patterning in the Arabidopsis root. The HD-Zip II TFs promote columella stem cell proliferation by acting as effectors of the FEZ/SMB circuit and, at the same time, by interfering with auxin signaling to counteract hormone-induced differentiation. Overall, our...

... how stem cells adopt distinct cell fates in the SAM. Here, we show that meristem patterning and floral organ primordia formation, besides auxin transport, are regulated by auxin biosynthesis mediated by two closely related genes of the TRYPTOPHAN AMINOTRANSFERASE family. In Arabidopsis SAM, TAA1...

...Ryan J. Emenecker; Joseph Cammarata; Irene Yuan; Caroline Howard; Shekufeh Ebrahimi Naghani; Helene S. Robert; Eiji Nambara; Lucia C. Strader ABSTRACT In concert with other phytohormones, auxin regulates plant growth and development. However, how auxin and other phytohormones coordinately regulate...

.... A hinge-like auricle also develops immediately distal to the ligule and contributes to blade angle. Here, we characterize the stages of PLB and early ligule development in terms of topography, cell area, division orientation, cell wall rigidity and auxin response dynamics. Differential thickening...

...Elena A. Zemlyanskaya; Viacheslav Zemlianski; Aleš Pěnčík; Dior R. Kelley; Ykä Helariutta; Ondřej Novák; Kamil Růžička ABSTRACT N6 -methyl adenosine (m 6 A) is a widespread internal mRNA modification impacting the expression of numerous genes. Here, we characterize auxin-related defects among...

... organogenesis. However, the roles of plant-specific class VIII myosin proteins in plant growth and development are less understood. Here, we investigated the function of an auxin-regulated class VIII myosin, Arabidopsis thaliana MYOSIN 1 (ATM1), using genetics, transcriptomics and live cell microscopy. ATM1...

...Joana Santos Teixeira; Thea van den Berg; Kirsten ten Tusscher ABSTRACT Priming is the process through which periodic elevations in auxin signalling prepattern future sites for lateral root formation, called prebranch sites. Thus far, the extent to which elevations in auxin concentration...

... that photoreceptors inhibit darkness-induced hypocotyl adventitious root (HAR) formation by directly stabilizing Aux/IAA proteins. In this study, we further report that phytochrome-interacting factors (PIFs) plays a central role in HAR initiation by simultaneously inducing the expression of genes involved in auxin...

... ). A novel sensor to map auxin response and distribution at high spatio-temporal resolution . Nature 482 , 103 - 106 . 10.1038/nature10791 Busch , W. , Moore , B. T. , Martsberger , B. , MacE , D. L. , Twigg , R. W. , Jung , J. , Pruteanu-Malinici , I. , Kennedy...

... initiates from the boundaries. The expression pattern of different marker genes during ovule development illustrates that this asynchronicity continues throughout whole ovule development. PIN-FORMED1 polar distribution and auxin response maxima correlate with ovule primordia asynchronous initiation. We have...

... are unknown. Here, we show the role of auxin and auxin transporters during the process of xylem bridge formation using an Orobanchaceae hemiparasitic plant, Phtheirospermum japonicum . The auxin response marker DR5 has a similar expression pattern to tracheary element differentiation genes in haustoria. Auxin...

...Priyanka Govindaraju; Carla Verna; Tongbo Zhu; Enrico Scarpella ABSTRACT Unlike in animals, in plants, vein patterning does not rely on direct cell-cell interaction and cell migration; instead, it depends on the transport of the plant hormone auxin, which in turn depends on the activity of the PIN...

... of marker genes, we found that vascular identity was specified in the 16-cell embryo. After a transient precursor state, however, there was no persistent uniform tissue identity. Auxin is intimately connected to vascular tissue development. We found that, although an AUXIN RESPONSE FACTOR5/MONOPTEROS (ARF5...

... that CsWUS directly bound to the promoter of CsCLV3 and activated its expression. Overexpression of CsFUL1 A , a FRUITFULL - like MADS-box gene, resulted in more petals and carpels. CsFUL1 A can directly bind to the CsWUS promoter to stimulate its expression. Furthermore, we found that auxin participated...

... and CUC2 regulate the transcription of the local auxin biosynthesis gene YUC4 in a coherent feed-forward loop, and this process is necessary to drive vascular regeneration. In the absence of this PLT-mediated regeneration response, leaf ground tissue cells can neither acquire the early vascular identity...

... on the mechanisms underlying the oscillatory signal and discuss how a periodic signal contributes to the conversion of founder cells into LR primordia. We also provide an overview of the phases of the root clock that may be influenced by endogenous factors, such as the plant hormone auxin, and by exogenous...

...Michael Sauer; Jürgen Kleine-Vehn ABSTRACT The phytohormone auxin influences virtually all aspects of plant growth and development. Auxin transport across membranes is facilitated by, among other proteins, members of the PIN-FORMED (PIN) and the structurally similar PIN-LIKES (PILS) families, which...

... early embryonic development, roots of the model plant Arabidopsis thaliana have a radially symmetric pattern, but a heterogeneous input of the hormone auxin from the two cotyledons forces the vascular cylinder to develop a diarch pattern with two xylem poles. Molecular analyses and mathematical...

... is frequency modulated by light and that auxin serves as a mediator for translating continuous light signals into discontinuous gene activation signals preceding the initiation of lateral roots in Arabidopsis seedlings. Based on this evidence, we propose a molecular model of an ultradian biological clock...