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| Open AccessTwo orthogonal differentiation gradients locally coordinate fruit morphogenesis
The coordination of cellular behaviors is essential for proper organogenesis. Here the authors show that fruit development in Arabidopsis is governed by time-shifted differentiation gradients that act locally along two perpendicular organ axes.
- Andrea Gómez-Felipe
- , Elvis Branchini
- & Daniel Kierzkowski
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Article
| Open AccessPetal abscission is promoted by jasmonic acid-induced autophagy at Arabidopsis petal bases
In angiosperms, petal abscission is crucial for reproductive success and seed dispersion. However, the regulation of this abscission remains unclear. Here, the authors identify a process of petal abscission regulated by jasmonic acid via autophagy at the base of Arabidopsis petals.
- Yuki Furuta
- , Haruka Yamamoto
- & Nobutoshi Yamaguchi
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| Open AccessArabidopsis TCP4 transcription factor inhibits high temperature-induced homeotic conversion of ovules
Global warming threatens food security and plant survival. This paper demonstrates that Class II TCP transcription factors are critical for specifying ovule identity and inhibiting the conversion of ovules into carpelloids under high temperature.
- Jingqiu Lan
- , Ning Wang
- & Genji Qin
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| Open AccessA BLADE-ON-PETIOLE orthologue regulates corolla differentiation in the proximal region in Torenia fournieri
Flowers manifest enormous diversity and shape is determined by morphogenesis along different independent axes. Here Su et al. report a shared BOP-ALOG module that regulates corolla differentiation in the proximal region axis.
- Shihao Su
- , Yawen Lei
- & Tetsuya Higashiyama
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Article
| Open AccessSpatially patterned hydrogen peroxide orchestrates stomatal development in Arabidopsis
Stomatal development is regulated by multiple intrinsic developmental and environmental signals. Here, the authors show that spatially patterned hydrogen peroxide activates the energy sensor SnRK1 to stabilize the SPCH transcription factor and optimize stomatal development in Arabidopsis.
- Wen Shi
- , Lingyan Wang
- & Ming-Yi Bai
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Article
| Open AccessLocal auxin competition explains fragmented differentiation patterns
Sieve element differentiation in Arabidopsis roots requires two antagonistic regulators of auxin efflux, BRX and PAX. Here the authors show that together they coordinate sieve element formation by preventing cell fate bistability emerging from AUX1-mediated competition for auxin between neighboring cells.
- Bernard Moret
- , Petra Marhava
- & Kirsten H. W. ten Tusscher
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| Open AccessArabidopsis FHY3 and FAR1 integrate light and strigolactone signaling to regulate branching
In plants, branching is regulated by both hormones and external cues such as light. Here the authors show that in Arabidopsis, the phytochrome A-signaling components FHY3 and FAR1, and SMXL proteins that repress strigolactone signaling, both interact with SPL proteins to control expression of the branching regulator BRC1.
- Yurong Xie
- , Yang Liu
- & Haiyang Wang
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| Open AccessA signal cascade originated from epidermis defines apical-basal patterning of Arabidopsis shoot apical meristems
A concentration gradient of HAM transcription factors specifies apical-basal patterning in the Arabidopsis shoot apical meristem. Here, the authors show that epidermal expression of the ATML1 transcription factor defines this concentration gradient via activation of mobile micro RNA.
- Han Han
- , An Yan
- & Yun Zhou
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Article
| Open AccessThe regulatory landscape of a core maize domestication module controlling bud dormancy and growth repression
The TB1 transcription factor was selected for the increased apical dominance of maize compared to its ancestor teosinte. A metabolic and genomic analysis of domesticated axillary buds suggest that TB1 achieved this by regulating phytohormone signaling, sugar metabolism and other domestication genes.
- Zhaobin Dong
- , Yuguo Xiao
- & George Chuck
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Article
| Open AccessQUIRKY regulates root epidermal cell patterning through stabilizing SCRAMBLED to control CAPRICE movement in Arabidopsis
SCM is a receptor-like kinase that ensures proper root patterning. Here, Song et al. find that SCM promotes the movement of CPC from non-hair cells to neighboring root epidermal cells and identify QKY as an additional facilitator of CPC mobility that acts by preventing vacuolar degradation of SCM.
- Jae Hyo Song
- , Su-Hwan Kwak
- & Myeong Min Lee
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Article
| Open AccessBLADE-ON-PETIOLE genes temporally and developmentally regulate the sheath to blade ratio of rice leaves
Despite the importance of proximal-distal patterning of leaves in cereal productivity, the underlying molecular mechanisms are poorly understood. Here, the authors find that the ratio of sheath to blade in rice leaf shifts depends on the expression levels of BLADE-ON-PETIOLE genes.
- Taiyo Toriba
- , Hiroki Tokunaga
- & Junko Kyozuka
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Article
| Open AccessA gene expression map of shoot domains reveals regulatory mechanisms
The shoot apical meristem (SAM) maintains stem cells and generates new leaves and flowers from its periphery. Here via spatially resolved translatome profiling, Tian et al. define distinct molecular signatures of different SAM and leaf domains and identify regulators of axillary meristem initiation.
- Caihuan Tian
- , Ying Wang
- & Yuling Jiao
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Article
| Open AccessGating of miRNA movement at defined cell-cell interfaces governs their impact as positional signals
Movement of small RNA between cells is critical to plant development and stress responses. Here the authors uncover a gate-keeping mechanism that can restrict small RNA movement at cell-cell interfaces, providing selectivity in long-distance signalling and limiting the scope of local mobility.
- Damianos S. Skopelitis
- , Kristine Hill
- & Marja C. P. Timmermans
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| Open AccessBarley SIX-ROWED SPIKE3 encodes a putative Jumonji C-type H3K9me2/me3 demethylase that represses lateral spikelet fertility
The VRS genes of barley control the fertility of the lateral spikelets on the barley inflorescence. Here, Bull et al. show that VRS3 encodes a putative Jumonji C-type histone demethylase that regulates expression of other VRS genes, and genes involved in stress, hormone and sugar metabolism.
- Hazel Bull
- , M. Cristina Casao
- & Robbie Waugh