...Isabella Burda; Fridtjof Brauns; Frances K. Clark; Chun-Biu Li; Adrienne H. K. Roeder ABSTRACT Organ sizes and shapes are highly reproducible, or robust, within a species and individuals. Arabidopsis thaliana sepals, which are the leaf-like organs that enclose flower buds, have consistent size...

... and how such surface barriers are generated. Post-embryonic surfaces have well-studied barriers, including the cuticle, and it has been previously shown that the late Arabidopsis thaliana embryo is protected by an endosperm-derived sheath deposited onto a primordial cuticle. Here, we show that both...

... 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...

... ability of the callus to regenerate organs. Here, we reveal the developmental trajectory of middle cell layer initiation and maintenance in callus tissue originating from Arabidopsis thaliana hypocotyls. The S phase of the cell cycle is essential for the expression of quiescent center-related SCARECROW...

... stem integrity in Arabidopsis thaliana have mainly been related to epidermal defects. Although these observations suggest a growth-limiting function at the stem cortex, deeper layers of the stem could also contribute to stem integrity. The nac secondary cell wall thickening promoting factor1 ( nst1...

... transport inhibitor (PATI)-treated leaf organs differ from those of non-treated foliage leaves of Arabidopsis thaliana , with a focus on the accumulation pattern of ANGUSTIFOLIA3 (AN3) protein, a key element for leaf meristem positioning. We found that PATI-induced leaf shape changes were correlated...

.... Here, we show that in the Arabidopsis thaliana mto2-2 mutant, in which threonine (Thr) synthesis is affected, the RAM lacks the PD. Through a combination of cell length profile analysis, mathematical modeling and molecular markers, we establish that the PD and TD can be uncoupled. Remarkably, although...

... the underlying mechanisms that drive these developmental phase transitions have been well elucidated for shoots, the extent to which they affect the root is less clear. However, root anatomy does change as some plants mature; meristems enlarge and radial thickening occurs. Here, in Arabidopsis thaliana , we show...

...Yingzhang Huang; Limeng Zhou; Chunhui Hou; Dianjing Guo ABSTRACT The morphology of the flowering plant is established during early embryogenesis. In recent years, many studies have focused on transcriptional profiling in plant embryogenesis, but the dynamic landscape of the Arabidopsis thaliana...

... range of processes throughout plant development. Here, we show that STIP is required for the correct patterning and curvature of the ovule in Arabidopsis thaliana . The knockout mutant stip-2 is characterized by a radialized ovule phenotype due to severe defects in outer integument development...

... ) and RABBIT EARS ( RBE ) regulate petal initiation in Arabidopsis thaliana and their transcripts are expressed in sepal boundary and petal initiation sites, respectively, suggesting that PTL acts in a non-cell-autonomous manner. Here, we determined that cells expressing PTL and RBE fusion proteins did...

... is a key question in developmental biology. Here, we use a network representation of live cell imaging data from shoot apical meristems (SAMs) in Arabidopsis thaliana to predict cell division events and their consequences at the tissue level. We show that a support vector machine classifier based...

... information, yet the behavior of individual cells is often highly heterogeneous. The origin of this variability is still unclear. Using time-lapse imaging, we determined the source and relevance of cellular growth variability in developing organs of Arabidopsis thaliana . We show that growth is more...

... attributed. Highlighted Article: Time-lapse microscopy reveals the spatiotemporal dynamics of intracellular reorganization associated with the functional transition and cell separation in Arabidopsis root caps, and the roles of autophagy in these processes. Arabidopsis thaliana...

..., but how the timing of this transition is established and maintained remains unknown. Using cell proliferation markers and genetic analysis, we show that CHIQUITA1 ( CHIQ1 ) is required to maintain the timing of the transition from proliferation to differentiation in Arabidopsis thaliana. Combining...

... regeneration in Arabidopsis thaliana and tomato grafts. Leaves were crucial for this effect, as blocking auxin transport or mutating PHYTOCHROME INTERACTING FACTOR 4 ( PIF4 ) or YUCCA2/5/8/9 in the cotyledons abolished the temperature enhancement. However, these perturbations did not affect grafting at ambient...

.... Arabidopsis thaliana plants were used for all aspects of this study. Columbia (Col-0), Wassilewskija (Ws) and Landsberg erecta (L er ) are widely available accessions, and were initially obtained from the Arabidopsis Biological Resource Center (ABRC), which was also the source for additional wild-type...

... and innovation in plant form. Marchantia polymorpha Physcomitrium patens Arabidopsis thaliana Zea mays Evo-devo Auxin response Auxins are a group of small molecules that regulate plant growth and development through a simple signaling pathway ( Lavy and Estelle, 2016 ; Leyser, 2018...

... in tissues. Here, we find that the unbalanced growth of inner and outer tissues in the clavata3 de-etiolated3 ( clv3 det3 ) mutant of Arabidopsis thaliana stretched epidermal cells, ultimately generating cracks in stems. Stem growth slowed before cracks appeared along clv3 det3 stems, whereas inner pith...

..., auxin transport in epidermis is neither required nor sufficient for vein patterning; instead, auxin transport in inner tissues is both required and sufficient for vein patterning. Arabidopsis thaliana Leaf development Vascular patterning Auxin PIN genes Necessity and sufficiency...