LEUNIG and SEUSS co-repressors regulate <i>miR172</i> expression in <i>Arabidopsis</i> flowers

Grigorova, Boyana; Mara, Chloe; Hollender, Courtney A.; Sijacic, Paja; Chen, Xuemei; Liu, Zhongchi

doi:10.1242/dev.058362

Cited by 83 publications

(70 citation statements)

References 39 publications

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“…Its main function is in transcriptional co-regulation, together with LEUNIG, in a series of events related to the floral organs and with pronounced expression at the beginning of flowering (Franks et al, 2002;Vaniyambadi et al, 2006;Hashimoto et al, 2008;Bao et al, 2010;Grigorova et al, 2011). This agrees with the results shown in Figure 2, as the expression pattern of this gene was reduced by 70% when buds were next to the anthesis and therefore when all gametic structures had been generated.…”

Section: Discussionsupporting

confidence: 73%

“…This agrees with the results shown in Figure 2, as the expression pattern of this gene was reduced by 70% when buds were next to the anthesis and therefore when all gametic structures had been generated. In A. thaliana, functional analysis indicated that SEUSS plays other roles in flower development, specifically in the carpel margin meristems, a vital meristematic structure located at the margins of the fused carpels and that gives rise to several structures in the female reproductive system, including the eggs (Franks et al, 2002;Azhakanandam et al, 2008;Grigorova et al, 2011;Kamiuchi et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

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Temporal and tissue expression of genes involved in buds of earliness cotton cultivar

Batista¹,

Pinheiro²,

Filho³

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Gene sequences previously identified in Arabidopsis buds were used as references in order to estimate temporal and tissue expression in buds, leaves, stem, and root tissues in cotton plants. Buds were evaluated during 3 phases: 2-8, 10-12, and 14-20 mm. Primers were designed for the ARF6, ATFY, and SEUSS genes for use in semi-quantitative reverse transcription-polymerase chain reaction and quantitative reverse transcription-polymerase chain reaction. Different levels of expression of the 3 genes were confirmed in cotton buds as well as in other tissues. The peak of gene expression was observed in buds sized 10-12 mm, after which expression decreased in larger buds. The gene GhFYPP3 was the most promising for further prospection of promoter regions, with regular expression 7387 Expression of genes involved in cotton buds ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (3): 7386-7394 (2015) patterns observed in bud sizes 10-12 and 14-20 mm. This trait was not observed in others genes.

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Temporal and tissue expression of genes involved in buds of earliness cotton cultivar

Batista¹,

Pinheiro²,

Filho³

et al. 2015

Genet. Mol. Res.

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“…Azhakanandam et al, 2008;Bao et al, 2010;Nole-Wilson et al, 2010;Lee et al, 2014). Interestingly, although SEU does not appear to possess a recognizable DNA-binding motif, it was shown by chromatin immunoprecipitation (ChIP) to associate with cis-regulatory elements located in the second intron of the floral homeotic gene AGAMOUS (AG; Sridhar et al, 2006) and with cisregulatory elements of miR172 genes (Grigorova et al, 2011). Hence, SEU likely regulates gene expression through interactions with DNA-binding transcription factors.…”

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confidence: 99%

SEUSS Integrates Gibberellin Signaling with Transcriptional Inputs from the SHR-SCR-SCL3 Module to Regulate Middle Cortex Formation in the Arabidopsis Root

et al. 2016

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A decade of studies on middle cortex (MC) formation in the root endodermis of Arabidopsis (Arabidopsis thaliana) have revealed a complex regulatory network that is orchestrated by several GRAS family transcription factors, including SHORT-ROOT (SHR), SCARECROW (SCR), and SCARECROW-LIKE3 (SCL3). However, how their functions are regulated remains obscure. Here we show that mutations in the SEUSS (SEU) gene led to a higher frequency of MC formation. seu mutants had strongly reduced expression of SHR, SCR, and SCL3, suggesting that SEU positively regulates these genes. Our results further indicate that SEU physically associates with upstream regulatory sequences of SHR, SCR, and SCL3; and that SEU has distinct genetic interactions with these genes in the control of MC formation, with SCL3 being epistatic to SEU. Similar to SCL3, SEU was repressed by the phytohormone GA and induced by the GA biosynthesis inhibitor paclobutrazol, suggesting that SEU acts downstream of GA signaling to regulate MC formation. Consistently, we found that SEU mediates the regulation of SCL3 by GA signaling. Together, our study identifies SEU as a new critical player that integrates GA signaling with transcriptional inputs from the SHR-SCR-SCL3 module to regulate MC formation in the Arabidopsis root.

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“…Petal identity is fixed in the second whorl by the combined function of class A, B, and E genes (Bowman et al, 1989;Weigel and Meyerowitz, 1994;Krizek and Fletcher, 2005). Suppression of AGAMOUS activity in the perianth whorls is important for petal growth, and this process is controlled by AP2, AINTEGUMENTA, LEUNIG, SEUSS, RABBIT EARS, ROXY1, and STERILE APETALA (Liu and Meyerowitz, 1995;Byzova et al, 1999;Conner and Liu, 2000;Krizek et al, 2000Krizek et al, , 2006Franks et al, 2002;Sridhar et al, 2004;Xing et al, 2005;Grigorova et al, 2011). Petal primordia arise at four loci in the second whorl, and this positioning is established independently of the process that determines organ identity (Griffith et al, 1999;Brewer et al, 2004;Takeda et al, 2004;Xing et al, 2005;Lampugnani et al, 2013).…”

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confidence: 99%

Physical Interaction of Floral Organs Controls Petal Morphogenesis in Arabidopsis

et al. 2013

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Flowering plants bear beautiful flowers to attract pollinators. Petals are the most variable organs in flowering plants, with their color, fragrance, and shape. In Arabidopsis (Arabidopsis thaliana), petal primordia arise at a similar time to stamen primordia and elongate at later stages through the narrow space between anthers and sepals. Although many of the genes involved in regulating petal identity and primordia growth are known, the molecular mechanism for the later elongation process remains unknown. We found a mutant, folded petals1 (fop1), in which normal petal development is inhibited during their growth through the narrow space between sepals and anthers, resulting in formation of folded petals at maturation. During elongation, the fop1 petals contact the sepal surface at several sites. The conical-shaped petal epidermal cells are flattened in the fop1 mutant, as if they had been pressed from the top. Surgical or genetic removal of sepals in young buds restores the regular growth of petals, suggesting that narrow space within a bud is the cause of petal folding in the fop1 mutant. FOP1 encodes a member of the bifunctional wax ester synthase/diacylglycerol acyltransferase family, WSD11, which is expressed in elongating petals and localized to the plasma membrane. These results suggest that the FOP1/WSD11 products synthesized in the petal epidermis may act as a lubricant, enabling uninhibited growth of the petals as they extend between the sepals and the anthers.

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LEUNIG and SEUSS co-repressors regulate miR172 expression in Arabidopsis flowers

Cited by 83 publications

References 39 publications

Temporal and tissue expression of genes involved in buds of earliness cotton cultivar

Temporal and tissue expression of genes involved in buds of earliness cotton cultivar

SEUSS Integrates Gibberellin Signaling with Transcriptional Inputs from the SHR-SCR-SCL3 Module to Regulate Middle Cortex Formation in the Arabidopsis Root

Physical Interaction of Floral Organs Controls Petal Morphogenesis in Arabidopsis

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