Establishment of polarity in angiosperm lateral organs

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

doi:10.1016/s0168-9525(01)02601-4

Cited by 270 publications

(234 citation statements)

References 44 publications

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“…Although INO does not provide gynobasal or gynoapical identity in the ovule itself, INO may function to promote abaxial identity in the outermost layer of the outer integument because it is expressed in those cells in both Arabidopsis and Impatiens. The juxtaposition of abaxial and adaxial identity has been proposed to be necessary for the laminar growth of lateral organs (Waites and Hudson, 1995;Bowman et al, 2002). Such a role for INO would explain how INO could be necessary for laminar growth of the outer integument.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms of Derived Unitegmy among Impatiens Species

2005

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Morphological transitions associated with ovule diversification provide unique opportunities for studies of developmental evolution. Here, we investigate the underlying mechanisms of one such transition, reduction in integument number, which has occurred several times among diverse angiosperms. In particular, reduction in integument number occurred early in the history of the asterids, a large clade comprising approximately one-third of all flowering plants. Unlike the vast majority of other eudicots, nearly all asterids have a single integument, with the only exceptions in the Ericales, a sister group to the other asterids. Impatiens, a genus of the Ericales, includes species with one integument, two integuments, or an apparently intermediate bifid integument. A comparison of the development of representative Impatiens species and analysis of the expression patterns of putative orthologs of the Arabidopsis thaliana ovule development gene INNER NO OUTER (INO) has enabled us to propose a mechanism responsible for morphological transitions between integument types in this group. We attribute transitions between each of the three integument morphologies to congenital fusion via a combination of variation in the location of subdermal growth beneath primordia and the merging of primordia. Evidence of multiple transitions in integument morphology among Impatiens species suggests that control of underlying developmental programs is relatively plastic and that changes in a small number of genes may have been responsible for the transitions. Our expression data also indicate that the role of INO in the outgrowth and abaxial-adaxial polarity of the outer integument has been conserved between two divergent angiosperms, the rosid Arabidopsis and the asterid Impatiens.

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Section: Discussionmentioning

confidence: 99%

Mechanisms of Derived Unitegmy among Impatiens Species

2005

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“…Because of an antagonistic regulatory interaction between adaxial and abaxial fates in lateral organs, a reduction in adaxial fate is often accompanied by an ectopic expansion of abaxial fate (Bowman et al, 2002). To determine if abaxial fate was expanded in seu ant mutant carpels, we examined the expression of the gynoecial abaxial fate determinants YAB1/FIL and CRC by in situ hybridization.…”

Section: Seu Ant Gynoecia Display Altered Expression Of Abaxial Fate mentioning

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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“…Leaves are lateral organs of seed plants derived from the peripheral zone of the shoot apical meristem and display polarized development along the proximaldistal axis and adaxial-abaxial axis (Bowman et al, 2002;Kidner and Timmermans, 2007). 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).…”

mentioning

confidence: 99%

“…There are two types of leaf transverse rolling in plants, inward (adaxial) and outward (abaxial) rolling, which are regulated by complicated developmental and polarity establishment controls (Bowman et al, 2002;Micol and Hake, 2003). In addition, environmental factors (e.g.…”

mentioning

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 angiosperm lateral organs

Cited by 270 publications

References 44 publications

Mechanisms of Derived Unitegmy among Impatiens Species

Mechanisms of Derived Unitegmy among Impatiens Species

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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