Establishment of polarity in lateral organs of plants

Eshed, Yuval; Baum, Stuart F.; Perea, John V.; Bowman, John L.

doi:10.1016/s0960-9822(01)00392-x

Cited by 593 publications

(510 citation statements)

References 25 publications

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“…We chose the promoter of SHOOT MERISTEMLESS (STM) for the shoot apical meristem (Kim et al, 2003), that of FLOWERING LOCUS D (FD) for the shoot apical meristem and leaf anlagen (Abe et al, 2005;Wigge et al, 2005), that of LATERAL ORGAN BOUNDARIES (LOB) for the periphery of the shoot apical meristem (Shuai et al, 2002), those of AINTEGUMENTA (ANT) and ASYMMETRIC LEAVES1 (AS1) for young leaf primordia (Schoof et al, 2000;Eshed et al, 2001), that of the SCARECROW homolog BLS for late leaf primordia (Lifschitz et al, 2006), and that of the SUCROSE-PROTON SYMPORTER2 (SUC2) for vascular tissue (Truernit and Sauer, 1995;Imlau et al, 1999). Specific activity of the promoters, as reported in the literature, was confirmed by promoter b-glucuronidase (GUS) fusions (see Supplemental Figure 3 online).…”

Section: Effects Of Mir156 Misexpressionmentioning

confidence: 99%

Dual Effects of miR156-TargetedSPLGenes andCYP78A5/KLUHon Plastochron Length and Organ Size inArabidopsis thaliana

et al. 2008

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Leaves of flowering plants are produced from the shoot apical meristem at regular intervals, with the time that elapses between the formation of two successive leaf primordia defining the plastochron. We have identified two genetic axes affecting plastochron length in Arabidopsis thaliana. One involves microRNA156 (miR156), which targets a series of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) genes. In situ hybridization studies and misexpression experiments demonstrate that miR156 is a quantitative, rather than spatial, modulator of SPL expression in leaf primordia and that SPL activity nonautonomously inhibits initiation of new leaves at the shoot apical meristem. The second axis is exemplified by a redundantly acting pair of cytochrome P450 genes, CYP78A5/KLUH and CYP78A7, which are likely orthologs of PLASTOCHRON1 of rice (Oryza sativa). Inactivation of CYP78A5, which is expressed at the periphery of the shoot apical meristem, accelerates the leaf initiation rate, whereas cyp78a5 cyp78a7 double mutants often die as embryos with supernumerary cotyledon primordia. The effects of both miR156-targeted SPL genes and CYP78A5 on organ size are correlated with changes in plastochron length, suggesting a potential compensatory mechanism that links the rate at which leaves are produced to final leaf size.

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Section: Effects Of Mir156 Misexpressionmentioning

confidence: 99%

Dual Effects of miR156-TargetedSPLGenes andCYP78A5/KLUHon Plastochron Length and Organ Size inArabidopsis thaliana

et al. 2008

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“…seu ant Gynoecia Fail to Maintain Expression of Adaxial Fate Regulators PHB and REV PHB, PHAVOLUTA (PHV), and REV are expressed within and are required for the specification of adaxial domains of Arabidopsis lateral organs (Zhong and Ye, 1999;Eshed et al, 2001;McConnell et al, 2001;Otsuga et al, 2001;Prigge et al, 2005). Additionally, they are expressed within adaxial portions of the gynoecium and are likely important for the specification of adaxial fate during gynoecium development (Otsuga et al, 2001;Prigge et al, 2005).…”

Section: Seu Ant Mutants Display Early Gynoecial Defects and Lack Ovumentioning

confidence: 99%

SEUSSandAINTEGUMENTAMediate Patterning and Ovule Initiation during Gynoecium Medial Domain Development

et al. 2008

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The Arabidopsis (Arabidopsis thaliana) gynoecium, the female floral reproductive structure, requires the action of genes that specify positional identities during its development to generate an organ competent for seed development and dispersal. Early in gynoecial development, patterning events divide the primordium into distinct domains that will give rise to specific tissues and organs. The medial domain of the gynoecium gives rise to the ovules, and several other structures critical for reproductive competence. Here we report a synergistic genetic interaction between seuss and aintegumenta mutants resulting in a complete loss of ovule initiation and a reduction of the structures derived from the medial domain. We show that patterning events are disrupted early in the development of the seuss aintegumenta gynoecia and we identify PHABULOSA (PHB), REVOLUTA, and CRABS CLAW (CRC) as potential downstream targets of SEUSS (SEU) and AINTEGUMENTA (ANT) regulation. Our genetic data suggest that SEU additionally functions in pathways that are partially redundant and parallel to PHB, CRC, and ANT. Thus, SEU and ANT are part of a complex and robust molecular system that coordinates patterning cues and cellular proliferation along the three positional axes of the developing gynoecium.During organ development, positional identity information must be coordinated with cellular proliferation to achieve proper organ shape and function. In the Arabidopsis (Arabidopsis thaliana) gynoecium, the female reproductive floral structure, early patterning events divide the gynoecial primordium into distinct zones that distinguish adaxial (inner) versus abaxial (outer), medial versus lateral, and apical versus basal

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“…As the major photosynthetic organ of plants, an optimal structure of leaves is important for the maximization of light capture and efficient gas exchange (Eshed et al, 2001;Moon and Hake, 2011). In the super-high-yield hybrid rice (Oryza sativa), characteristics of the last three leaves were proposed to be long, erect, narrow, V shaped (rolled), and thick (Yuan, 1997).…”

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confidence: 99%

SEMI-ROLLED LEAF1 Encodes a Putative Glycosylphosphatidylinositol-Anchored Protein and Modulates Rice Leaf Rolling by Regulating the Formation of Bulliform Cells

et al. 2012

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Leaf rolling is an important agronomic trait in rice (Oryza sativa) breeding and moderate leaf rolling maintains the erectness of leaves and minimizes shadowing between leaves, leading to improved photosynthetic efficiency and grain yields. Although a few rolled-leaf mutants have been identified and some genes controlling leaf rolling have been isolated, the molecular mechanisms of leaf rolling still need to be elucidated. Here we report the isolation and characterization of SEMI-ROLLED LEAF1 (SRL1), a gene involved in the regulation of leaf rolling. Mutants srl1-1 (point mutation) and srl1-2 (transferred DNA insertion) exhibit adaxially rolled leaves due to the increased numbers of bulliform cells at the adaxial cell layers, which could be rescued by complementary expression of SRL1. SRL1 is expressed in various tissues and is expressed at low levels in bulliform cells. SRL1 protein is located at the plasma membrane and predicted to be a putative glycosylphosphatidylinositol-anchored protein. Moreover, analysis of the gene expression profile of cells that will become epidermal cells in wild type but probably bulliform cells in srl1-1 by laser-captured microdissection revealed that the expression of genes encoding vacuolar H+-ATPase (subunits A, B, C, and D) and H+-pyrophosphatase, which are increased during the formation of bulliform cells, were up-regulated in srl1-1. These results provide the transcript profile of rice leaf cells that will become bulliform cells and demonstrate that SRL1 regulates leaf rolling through inhibiting the formation of bulliform cells by negatively regulating the expression of genes encoding vacuolar H+-ATPase subunits and H+-pyrophosphatase, which will help to understand the mechanism regulating leaf rolling.

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Establishment of polarity in lateral organs of plants

Cited by 593 publications

References 25 publications

Dual Effects of miR156-TargetedSPLGenes andCYP78A5/KLUHon Plastochron Length and Organ Size inArabidopsis thaliana

Dual Effects of miR156-TargetedSPLGenes andCYP78A5/KLUHon Plastochron Length and Organ Size inArabidopsis thaliana

SEUSSandAINTEGUMENTAMediate Patterning and Ovule Initiation during Gynoecium Medial Domain Development

SEMI-ROLLED LEAF1 Encodes a Putative Glycosylphosphatidylinositol-Anchored Protein and Modulates Rice Leaf Rolling by Regulating the Formation of Bulliform Cells

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