... during post-embryonic development, stem cells are present in meristems at the root and shoot apex. PLETHORA/AINTEGUMENTA-LIKE (PLT/AIL) transcription factors are regulators of post-embryonic meristem function and are required to maintain stem cell pools. Despite the parallels between embryonic and post...

...Shalini Yadav; Harish Kumar; Monika Mahajan; Sangram Keshari Sahu; Sharad Kumar Singh; Ram Kishor Yadav ABSTRACT The shoot apical meristem (SAM) of higher plants comprises distinct functional zones. The central zone (CZ) is located at the meristem summit and harbors pluripotent stem cells. Stem...

...Wakana Tanaka; Suzuha Ohmori; Naoto Kawakami; Hiro-Yuki Hirano ABSTRACT Plant development depends on the activity of pluripotent stem cells in meristems, such as the shoot apical meristem and the flower meristem. In Arabidopsis thaliana , WUSCHEL ( WUS ) is essential for stem cell homeostasis...

... from the wall connects the state of cell wall homeostasis to the BR receptor complex and modulates BR activity. Here, we report that both pectin-triggered cell wall signalling and impaired BR signalling result in altered cell wall orientation in the Arabidopsis root meristem. Furthermore, both...

... phenocopies YAK1 loss of function. Microscopy analysis revealed that YAK1 functions to repress meristem size and induce differentiation. We show that YAK1 represses cyclin expression in the different zones of the root meristem and that YAK1 is essential for TOR-dependent transcriptional regulation...

... attributed. Highlighted Article: A single bifacial stem cell that is characterized by the combined activity of PXY ( TDR ), SMXL5 and WOX4 genes generates both wood and bast during radial plant growth. Stem cells Secondary growth Cambium Cell lineage Meristem Arabidopsis thaliana...

...: This Primer summarizes the emerging roles of reactive oxygen species and redox-dependent mechanisms in plant growth and development, highlighting interactions with phytohormonal networks. Plants Hydrogen peroxide Redox metabolism Cell cycle Division Meristem Root Gametophyte Senescence...

.... Target of rapamycin protein kinase Nutrient signaling Metabolism reprogramming Cell cycle regulation Meristem Stem cell niche Emerging evidence supports the notion that signaling and metabolic networks are intertwined and play instructive roles in developmental programs and responses...

...Simon Scofield; Alexander Murison; Angharad Jones; John Fozard; Mitsuhiro Aida; Leah R. Band; Malcolm Bennett; James A. H. Murray ABSTRACT The Arabidopsis homeodomain transcription factor SHOOT MERISTEMLESS (STM) is crucial for shoot apical meristem (SAM) function, yet the components and structure...

... was observed at the meristem and related to defects in spatial patterns of auxin activity. Thus, the regularity of spatial, auxin-dependent, patterning at the meristem requires Paf1c. Stems were cut and the SAM was dissected when it switched to an inflorescence meristem identity, i.e. between...

.... Summary: Adjacent tissues have different requirements for the precise positioning of the division plane, which is mediated at the intracellular level by the preprophase band that controls the pattern of cell division. Tissue patterning TON1a Meristem Epidermis Cortex Preprophase band...

... contributes to this patterning. Phyllotaxis Patterning Meristem Laser ablation Auxin PIN1 Tomato Leaves and flowers are arranged in regular patterns around the stem, a phenomenon known as phyllotaxis ( Reinhardt, 2005 ; Kuhlemeier, 2007 ). Most frequent is spiral phyllotaxis, in which...

... for correspondence ( [email protected] ) Competing interests statement The authors declare no competing financial interests. © 2013. Published by The Company of Biologists Ltd Phyllotaxis Auxin Cytoskeleton Biomechanics Meristem Morphogenesis Plant architecture...

... niche formation in root apical meristems, and loss of function of these genes causes a defect in stem cell maintenance ( Aida et al., 2004 ). A gradient of PLT proteins controls stem cell programming, mitotic activity and cell differentiation ( Galinha et al., 2007 ). ANT , another gene...

... organs in several plant species, but their contribution to meristem homeostasis remains unexplored. Our analyses report that both loss- and gain-of-function BR-related mutants in Arabidopsis thaliana have reduced meristem size, indicating that balanced BR signalling is needed for the optimal root growth...

...Atsuko Kinoshita; Shigeyuki Betsuyaku; Yuriko Osakabe; Shinji Mizuno; Shingo Nagawa; Yvonne Stahl; Rüdiger Simon; Kazuko Yamaguchi-Shinozaki; Hiroo Fukuda; Shinichiro Sawa The shoot apical meristem (SAM) is the fundamental structure that is located at the growing tip and gives rise to all aerial...

...George Chuck; Clinton Whipple; David Jackson; Sarah Hake Plant architecture consists of repeating units called phytomers, each containing an internode, leaf and axillary meristem. The formation of boundaries within the phytomer is necessary to differentiate and separate these three components...

...Anna Skylar; Fangxin Hong; Joanne Chory; Detlef Weigel; Xuelin Wu The establishment of the primary meristems through proliferation after germination is essential for plant post-embryonic development. Cytokinins have long been considered a key regulator of plant cell division. Here we show...

...George Chuck; Robert Meeley; Sarah Hake Grass flowers are organized on small branches known as spikelets. In maize,the spikelet meristem is determinate, producing one floral meristem and then converting into a second floral meristem. The APETALA2 ( AP2 )-like gene indeterminate spikelet1 ( ids1...

...-cell-autonomous mechanism. Furthermore,mutant and marker gene analyses suggest that during shoot meristem formation, ZLL functions in a similar manner but in a sequential order with its close homologue AGO1 , which mediates RNA interference. Thus, WUS -dependent OC signalling to the stem cells...