Tracing the ontogeny of stomatal clusters in <i>Arabidopsis</i> with molecular markers

Serna, Laura; Fenoll, Carmen

doi:10.1046/j.1365-313x.1997.12040747.x

Cited by 70 publications

(50 citation statements)

References 21 publications

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“…While several environmental (CO 2, humidity, temperature) and hormonal factors (ethylene and abscisic acid (ABA)) are known to effect stomatal density or SI, very little is known about the underlying molecular or genetic basis for the changes (Serna and Fenoll, 1997;Gray et al, 2000;Casson and Hetherington, 2010). The known role of MPK6 in multiple stress responses suggests that MAPK signaling may be a common mechanism through which environmental cues modify developmental programs (Colcombet and Hirt, 2008;Popescu et al, 2009).…”

Section: Other Environmental Influencesmentioning

confidence: 99%

Stomatal Development in Arabidopsis

Pillitteri

Dong

2013

The Arabidopsis Book

128

119

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Stomata consist of two guard cells that function as turgor-operated valves that regulate gas exchange in plants. In Arabidopsis, a dedicated cell lineage is initiated and undergoes a series of cell divisions and cell-state transitions to produce a stoma. A set of basic helix-loop-helix (bHLH) transcription factors regulates the transition and differentiation events through the lineage, while the placement of stomata relative to each other is controlled by intercellular signaling via peptide ligands, transmembrane receptors, and mitogen-activated protein kinase (MAPK) modules. Some genes involved in regulating stomatal differentiation or density are also involved in hormonal and environmental stress responses, which may provide a link between modulation of stomatal development or function in response to changes in the environment. Premitotic polarlylocalized proteins provide an added layer of regulation, which can be addressed more thoroughly with the identification of additional proteins in this pathway. Linking the networks that control stomatal development promises to bring advances to our understanding of signal transduction, cell polarity, and cell-fate specification in plants.

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Section: Other Environmental Influencesmentioning

confidence: 99%

Stomatal Development in Arabidopsis

Pillitteri

Dong

2013

The Arabidopsis Book

128

119

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“…This event is central to patterning because ‫%57ف‬ of leaf stomata derive from satellite meristemoids and because the generation of an intervening cell also spaces the preexisting stoma. Although satellite meristemoids have been documented in other dicots, the central patterning role of the divisions that produce them has not been recognized (Bünning, 1956;Landré, 1972;Sachs, 1979Sachs, , 1991Kagan et al, 1992;Serna and Fenoll, 1997).…”

Section: Oriented Asymmetric Divisions Create One-celled Spacingmentioning

confidence: 99%

Oriented Asymmetric Divisions That Generate the Stomatal Spacing Pattern in Arabidopsis Are Disrupted by the too many mouths Mutation

Geisler¹,

Nadeau²,

Sack³

2000

Plant Cell

319

311

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Wild-type stomata are spaced by intervening cells, a pattern disrupted in the Arabidopsis mutant too many mouths ( tmm ). To determine the mechanism of wild-type spacing and how tmm results in pattern violations, we analyzed the behavior of cells through time by using sequential dental resin impressions. Meristemoids are stomatal precursors produced by asymmetric division. We show that wild-type patterning largely results when divisions next to a preexisting stoma or precursor are oriented so that the new meristemoid is placed away. Because this placement is independent of cell lineage, these divisions may be oriented by cell-cell signaling. tmm randomizes this orientation and releases a prohibition on asymmetric division in cells at specific locations, resulting in stomatal clusters. TMM is thus necessary for two position-dependent events in leaves: the orientation of asymmetric divisions that pattern stomata, and the control of which cells will enter the stomatal pathway. In addition, our findings argue against most previous hypotheses of wild-type stomatal patterning.

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“…In both cases, pattern formation takes place in a two-dimensional field of cells. Stomatal patterning is mainly established by a series of highly oriented asymmetric cell divisions placing the two guard cells in the center of the future stomatal complex (Yang and Sack, 1995;Serna and Fenoll, 1997). As a result, guard cells are always surrounded by epidermal pavement cells and, thus, are separated from other stomatal cells.…”

Section: Introductionmentioning

confidence: 99%

Generation of a Spacing Pattern: The Role of TRIPTYCHON in Trichome Patterning in Arabidopsis

et al. 1999

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Trichomes in Arabidopsis are single-celled hairs that exhibit a regular spacing pattern. Here, the role of TRIPTYCHON ( TRY ) in the generation of this spacing pattern is studied. By using genetic mosaics, we demonstrate that the formation of trichome clusters in try mutants is not correlated with cell lineage, indicating that TRY is required to single out trichome cells in a process involving cellular interactions. The genetic interactions of TRY , GLABRA1 ( GL1 ), and TRANS-PARENT TESTA GLABRA ( TTG ) in trichome patterning are assessed by determining the cluster frequency in various genetic combinations. It is shown that TRY acts as a negative regulator of GL1 -and TTG -dependent pathways. Furthermore, it is demonstrated that trichome initiation in ttg-1 , a strong ttg allele, is rescued almost to wild-type levels in a try background in which GL1 is expressed under the control of the cauliflower mosaic virus 35S promoter, indicating that TTG acts upstream of GL1 and TRY . These findings are incorporated into a model to explain the generation of a trichome spacing pattern from a homogeneous population of epidermal cells.

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Tracing the ontogeny of stomatal clusters in Arabidopsis with molecular markers

Cited by 70 publications

References 21 publications

Stomatal Development in Arabidopsis

Stomatal Development in Arabidopsis

Oriented Asymmetric Divisions That Generate the Stomatal Spacing Pattern in Arabidopsis Are Disrupted by the too many mouths Mutation

Generation of a Spacing Pattern: The Role of TRIPTYCHON in Trichome Patterning in Arabidopsis

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