The Arabidopsis Auxin-Inducible Gene <i>ARGOS</i> Controls Lateral Organ Size

Hu, Yuxin; Xie, Qi; Chua, Nam‐Hai

doi:10.1105/tpc.013557

Cited by 413 publications

(386 citation statements)

References 55 publications

(69 reference statements)

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“…The shape and progression of the primary arrest front is known to be influenced by class II TCP genes, CIN in Antirrhinium (19) or TCP2 and TCP4 in Arabidopsis (20), and it has been suggested that the extent of cell proliferation in the primordium may be regulated by a balance between the antagonistic activities of class I and II TCP genes on the expression of cyclin and ribosomal protein genes (28). Other genes, such as ANT, ARGOS, AN3, GRF5, JAG, SMP, and SWP, which promote cell division during leaf development, also seem to act on proliferation in the primordium (8)(9)(10)(11)(12)(13)(14)(15)(16). However, it is has not been established whether any of these genes also influences cell proliferation in the DMC zone.…”

Section: Discussionmentioning

confidence: 99%

“…Some of these genes have positive roles in regulating cell proliferation. Included in this category are genes such as AINTEGUMENTA (ANT), ARGOS, ANGUSTIFO-LIA (AN3), ERECTA, GROWTH-REGULATING FACTOR 5 (GRF5), JAGGED (JAG), STRUWWELPETER (SWP), and SWELLMAP (SMP1), which act to prolong the proliferative cell division phase during organ development (8)(9)(10)(11)(12)(13)(14)(15)(16). There are also general negative regulators of cell proliferation and organ growth, such as the interaction of AUXIN RESPONSE FACTOR 2 (ARF2) with ANT (17), and the BLADE ON PETIOLE (BOP) genes, which repress the transcription of JAG (18).…”

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confidence: 99%

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PEAPOD regulates lamina size and curvature in Arabidopsis

White

2006

Proc. Natl. Acad. Sci. U.S.A.

253

349

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Although a complex pattern of interspersed cell proliferation and cell differentiation is known to occur during leaf blade development in eudicot plants, the genetic mechanisms coordinating this growth are unclear. In Arabidopsis, deletion of the PEAPOD (PPD) locus increases leaf lamina size and results in dome-shaped rather than flat leaves. Siliques are also altered in shape because of extra lamina growth. The curvature of a ⌬ppd leaf reflects the difference between excess growth of the lamina and a limitation to the extension capacity of its perimeter. Excess lamina growth in ⌬ppd plants is due to a prolonged phase of dispersed meristematic cell (DMC) proliferation (for example, the meristemoid and procambium cells that form stomatal stem cells and vascular cells, respectively) during blade development. The PPD locus is composed of two homologous genes, PPD1 and PPD2, which encode plantspecific putative DNA-binding proteins. Overexpression of PPD reduces lamina size by promoting the early arrest of DMC proliferation during leaf and silique development. Therefore, by regulating the arrest of DMC proliferation, the PPD genes coordinate tissue growth, modulate lamina size, and limit curvature of the leaf blade. I propose a revised model of leaf development with two cell-cycle arrest fronts progressing from the tip to the base: the known primary front, which determines arrest of general cell proliferation, followed by a secondary front that involves PPD and arrests DMC division.cell proliferation ͉ coordinated growth ͉ leaf development

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

PEAPOD regulates lamina size and curvature in Arabidopsis

White

2006

Proc. Natl. Acad. Sci. U.S.A.

253

349

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“…In all attempts to increase plant growth reported to date, for instance in plants that misexpressed the recently identified ARGOS gene [49], the duration of cell division was temporally and spatially increased. By contrast, a great increase in the pace of cell division resulted in delayed differentiation, as seen in plants that misexpress CYCA3;2, CYCD3;1, or E2Fa-DPa [16 ,17 ,19].…”

Section: Cell Cycle and Tissue And Organ Growthmentioning

confidence: 99%

Cell cycle and differentiation

Jakoby

Schnittger

2004

Current Opinion in Plant Biology

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“…The coding regions of LBD16, LBD17, LBD18 and LBD29 were cloned into pVIP96 [50] for generation of Pro35S:LBD16, Pro35S:LBD17, Pro35S:LBD18 and Pro35S:LBD29 constructs, respectively, and a LBD16 fused with SRDX transcriptional repression domain (LDLDLELRLGFA) linker sequence [39] was used to generate Pro35S:LBD16:SRDX construct. The coding region of LBD29 was cloned into pER10 vector for generating ProXVE:LBD29 construct [43].…”

Section: Plasmid Construction and Arabidopsis Transformationmentioning

confidence: 99%

“…The relative expression values were calculated using a modified 2 −∆∆CT method [49]. GUS activity was assayed with the method described previously [50]. The primers used for gene expression analysis are listed in Supplementary information, Table S1.…”

Section: Rna Isolation and Gene Expression Analysismentioning

confidence: 99%

LATERAL ORGAN BOUNDARIES DOMAIN transcription factors direct callus formation in Arabidopsis regeneration

et al. 2012

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The remarkable regeneration capability of plant tissues or organs under culture conditions has underlain an extensive practice for decades. The initial step in plant in vitro regeneration often involves the induction of a pluripotent cell mass termed callus, which is driven by the phytohormone auxin and occurs via a root development pathway. However, the key molecules governing callus formation remain unknown. Here we demonstrate that Arabidopsis LATERAL ORGAN BOUNDARIES DOMAIN (LBD)/ASYMMETRIC LEAVES2-LIKE (ASL) transcription factors are involved in the control of callus formation program. The four LBD genes downstream of AUXIN RESPONSE FACTORs (ARFs), LBD16, LBD17, LBD18 and LBD29, are rapidly and dramatically induced by callus-inducing medium (CIM) in multiple organs. Ectopic expression of each of the four LBD genes in Arabidopsis is sufficient to trigger spontaneous callus formation without exogenous phytohormones, whereas suppression of LBD function inhibits the callus formation induced by CIM. Moreover, the callus triggered by LBD resembles that induced by CIM by characteristics of ectopically activated root meristem genes and efficient regeneration capacity. These findings define LBD transcription factors as key regulators in the callus induction process, thereby establishing a molecular link between auxin signaling and the plant regeneration program.

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The Arabidopsis Auxin-Inducible Gene ARGOS Controls Lateral Organ Size

Cited by 413 publications

References 55 publications

PEAPOD regulates lamina size and curvature in Arabidopsis

PEAPOD regulates lamina size and curvature in Arabidopsis

Cell cycle and differentiation

LATERAL ORGAN BOUNDARIES DOMAIN transcription factors direct callus formation in Arabidopsis regeneration

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