Asymmetric leaf development and blade expansion in<i>Arabidopsis</i>are mediated by KANADI and YABBY activities

Eshed, Yuval; Izhaki, Anat; Baum, Stuart F.; Floyd, Sandra K.; Bowman, John L.

doi:10.1242/dev.01186

Cited by 362 publications

(435 citation statements)

References 20 publications

(36 reference statements)

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“…The four KANADI genes also act redundantly to one another and the strongest phenotypes are seen in lines carrying mutations in three or more of the KANADI genes (Eshed et al 1999(Eshed et al , 2004Kerstetter et al 2001). Overexpression of KANADI causes leaves to curl down or, in more severe cases, to develop without blades.…”

Section: Hd-zipiii and Kanadi Proteins Act Oppositely To Control Leafmentioning

confidence: 99%

Of Blades and Branches: Understanding and Expanding the Arabidopsis Ad/Abaxial Regulatory Network through Target Gene Identification

Liu

Reinhart

Magnani

et al. 2012

Cold Spring Harbor Symposia on Quantitative Biology

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HD-ZIPIII and KANADI transcription factors have opposing and dramatic affects on plant development. Analysis of mutants shows these proteins to be master regulators of ad/abaxial (i.e., upper/lower) leaf polarity, leaf blade outgrowth, and branch formation. Because these factors do their work by regulating other genes, we have focused our attention on defining their targets. We have found overlap between the ad/abaxial regulatory pathway and hormone signaling pathways, especially pathways of abscisic acid and auxin signaling. This has led to the discovery that abscisic acid signaling acts upstream of HD-ZIPIII and KANADI in the control of germination and may ultimately explain how environmental stress pathways control new growth at the shoot apex. Auxin signaling conversely is downstream from HD-ZIPIII and KANADI action with these factors controlling targets at all steps of auxin action-biosynthesis, transport, regulation of transport, and signaling. Based on these findings, we propose a model in which the HD-ZIPIII and KANADI factors pattern auxin response in the embryo. Finally, many genes targeted for control by HD-ZIPIII and KANADI proteins are themselves transcription factors-indicating these master regulators call up tissue specific subprograms of transcriptional control to affect the many polar differences observed across tissues.

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Section: Hd-zipiii and Kanadi Proteins Act Oppositely To Control Leafmentioning

confidence: 99%

Of Blades and Branches: Understanding and Expanding the Arabidopsis Ad/Abaxial Regulatory Network through Target Gene Identification

Liu

Reinhart

Magnani

et al. 2012

Cold Spring Harbor Symposia on Quantitative Biology

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“…The KANADI genes, KAN1, 2, and 3 (but not KAN4) are initially expressed throughout the early globular stage embryo, but their domain of expression becomes restricted to the basal peripheral region. By the heart stage this domain comes to mark the basal abaxial portion of the cotyledon primordia (Fig 15E, F, G) (Eshed et al, 2004;McAbee et al, 2006). A triple mutant kan1 kan2 kan4 displays an enlarged SAM as well as a loss of adaxial-abaxial polarity of the cotyledons.…”

Section: Adaxial-abaxial Patterningmentioning

confidence: 99%

Embryogenesis: Pattern Formation from a Single Cell

Capron

Chatfield

Provart

et al. 2009

The Arabidopsis Book

101

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During embryogenesis a single cell gives rise to a functional multicellular organism. In higher plants, as in many other multicellular systems, essential architectural features, such as body axes and major tissue layers are established early in embryogenesis and serve as a positional framework for subsequent pattern elaboration. In Arabidopsis, the apicalbasal axis and the radial pattern of tissues wrapped around it are already recognizable in young embryos of only about a hundred cells in size. This early axial pattern seems to provide a coordinate system for the embryonic initiation of shoot and root. Findings from genetic studies in Arabidopsis are revealing molecular mechanisms underlying the initial establishment of the axial core pattern and its subsequent elaboration into functional shoots and roots. The genetic programs operating in the early embryo organize functional cell patterns rapidly and reproducibly from minimal cell numbers. Understanding their molecular details could therefore greatly expand our ability to generate plant body patterns de novo, with important implications for plant breeding and biotechnology.

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“…KAN gene family encodes Golden2/Arabidopsis response-regulated/Psr1 (GARP) transcription factors. Both YABs and KANs are small gene families and KAN proteins are likely to repress adaxial-promoting HD-ZIPIIIs that repress expression of the KAN and YAB genes (Eshed et al, , 2004. This mutually antagonistic relationship between KAN and HD-ZIPIII appears to drive lamina growth that is dependent on the activity of the YAB proteins.…”

Section: Control Of Leaf Development In Ricementioning

confidence: 99%

Genetic modification of plant architecture and variety improvement in rice

2008

Heredity

105

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The structure of the aerial part of a plant, referred to as plant architecture, is subject to strict genetic control, and grain production in cereal crops is governed by an array of agronomic traits. Rice is one of the most important cereal crops and is also a model plant for molecular biological research. Recently, significant progress has been made in isolating and collecting rice mutants that exhibit altered plant architecture. In this article we summarize the recent progress in understanding the basic patterning mechanisms involved in the regulation of tillering (branching) pattern, stem structure and leaf arrangement in rice plants. We discuss the relationship between the genetic modification of plant architecture and the improvement of pivotal agronomic traits in rice.

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Asymmetric leaf development and blade expansion inArabidopsisare mediated by KANADI and YABBY activities

Cited by 362 publications

References 20 publications

Of Blades and Branches: Understanding and Expanding the Arabidopsis Ad/Abaxial Regulatory Network through Target Gene Identification

Of Blades and Branches: Understanding and Expanding the Arabidopsis Ad/Abaxial Regulatory Network through Target Gene Identification

Embryogenesis: Pattern Formation from a Single Cell

Genetic modification of plant architecture and variety improvement in rice

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