Spatiotemporal signalling in plant development

Sparks, Erin E.; Wachsman, Guy; Benfey, Philip N.

doi:10.1038/nrg3541

Cited by 90 publications

(73 citation statements)

References 140 publications

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“…Plant cells are surrounded by a rigid but dynamic cell wall, which prevents them from migration during specification; hence, they acquire their fate by positional information from neighboring cells. The cellular communication involves diffusible or actively transported molecules, such as peptides, small RNAs, TFs, or phytohormones, that upon recognition by competent cells trigger signaling cascades that result in the initiation or repression of specific developmental programs (Sparks et al, 2013). Remarkably, nine TETRASPANINs (TET1, TET3, TET4, TET5, TET8, TET10, TET13, TET14, and TET15) are expressed in embryonic progenitor tissue, and three are expressed early in the cell lineage of the seedling until differentiation (TET2, TET9, and TET13).…”

Section: Discussionmentioning

confidence: 99%

Functional Analysis of Arabidopsis TETRASPANIN Gene Family in Plant Growth and Development

et al. 2015

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TETRASPANIN (TET) genes encode conserved integral membrane proteins that are known in animals to function in cellular communication during gamete fusion, immunity reaction, and pathogen recognition. In plants, functional information is limited to one of the 17 members of the Arabidopsis (Arabidopsis thaliana) TET gene family and to expression data in reproductive stages. Here, the promoter activity of all 17 Arabidopsis TET genes was investigated by pAtTET::NUCLEAR LOCALIZATION SIGNAL-GREEN FLUORESCENT PROTEIN/b-GLUCURONIDASE reporter lines throughout the life cycle, which predicted functional divergence in the paralogous genes per clade. However, partial overlap was observed for many TET genes across the clades, correlating with few phenotypes in single mutants and, therefore, requiring double mutant combinations for functional investigation. Mutational analysis showed a role for TET13 in primary root growth and lateral root development and redundant roles for TET5 and TET6 in leaf and root growth through negative regulation of cell proliferation. Strikingly, a number of TET genes were expressed in embryonic and seedling progenitor cells and remained expressed until the differentiation state in the mature plant, suggesting a dynamic function over developmental stages. The cis-regulatory elements together with transcription factor-binding data provided molecular insight into the sites, conditions, and perturbations that affect TET gene expression and positioned the TET genes in different molecular pathways; the data represent a hypothesis-generating resource for further functional analyses.

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Section: Discussionmentioning

confidence: 99%

Functional Analysis of Arabidopsis TETRASPANIN Gene Family in Plant Growth and Development

et al. 2015

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“…This leads to downregulation of the WUSCHEL (WUS; At2g17950) homeobox transcription factor, a positive regulator of stem cell maintenance (reviewed by Miyashima et al, 2013;Sparks et al, 2013). The WUSCHEL-RELATED HOMEOBOX4 (WOX4; At1g46480) transcription factor was identified as the WOX family member most responsive to the TDIF peptide in Arabidopsis seedlings (Hirakawa et al, 2010).…”

Section: Molecular Regulators Of Root and Hypocotyl Secondary Growthmentioning

confidence: 99%

Vascular Cambium Development

Nieminen

Blomster

Helariutta

et al. 2015

The Arabidopsis Book

116

110

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Secondary phloem and xylem tissues are produced through the activity of vascular cambium, the cylindrical secondary meristem which arises among the primary plant tissues. Most dicotyledonous species undergo secondary development, among them Arabidopsis. Despite its small size and herbaceous nature, Arabidopsis displays prominent secondary growth in several organs, including the root, hypocotyl and shoot. Together with the vast genetic resources and molecular research methods available for it, this has made Arabidopsis a versatile and accessible model organism for studying cambial development and wood formation. In this review, we discuss and compare the development and function of the vascular cambium in the Arabidopsis root, hypocotyl, and shoot. We describe the current understanding of the molecular regulation of vascular cambium and compare it to the function of primary meristems. We conclude with a look at the future prospects of cambium research, including opportunities provided by phenotyping and modelling approaches, complemented by studies of natural variation and comparative genetic studies in perennial and woody plant species.

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“…At the whole-plant level, this is aided by long-distance signaling between organs, which is important both for plant development and defense responses (Shah and Zeier, 2013;Sparks et al, 2013). Mechanisms for long-distance communication include calcium and reactive oxygen species waves, action potentials, and hydraulic waves, as well as phytohormones and some small RNAs (Shah and Zeier, 2013;Sparks et al, 2013;Gilroy et al, 2014).…”

mentioning

confidence: 99%