Regulation of flowering time by<i>Arabidopsis MSI1</i>

Bouveret, Romaric; Schönrock, Nicole; Gruissem, Wilhelm; Hennig, Lars

doi:10.1242/dev.02340

Cited by 105 publications

(135 citation statements)

References 66 publications

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“…Similar to Trx, Set1 functions in a large protein complex, COMPASS (Complex Proteins Associated with Set1), in mediating histone methylation [71,72]. In Arabidopsis, it has been demonstrated that H3K4 methylation is associated with a permissive state of gene expression during plant development [73,74]. ATX1 (subgroup III-1; Table 1) was the first protein confirmed to have H3K4 methyltransferase activity in plants and it is involved in floral development through activating flower homeotic genes [75,76].…”

Section: Class Iii: the Trithorax Homologs And Related Proteins (H3k4)mentioning

confidence: 99%

Plant SET domain-containing proteins: Structure, function and regulation

Wang

Chandrasekharan

et al. 2007

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expres

176

195

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Modification of the histone proteins that form the core around which chromosomal DNA is looped has profound epigenetic effects on the accessibility of the associated DNA for transcription, replication and repair. The SET domain is now recognized as generally having methyltransferase activity targeted to specific lysine residues of histone H3 or H4. There is considerable sequence conservation within the SET domain and within its flanking regions. Previous reviews have shown that SET proteins from Arabidopsis and maize fall into five classes according to their sequence and domain architectures. These classes generally reflect specificity for a particular substrate. SET proteins from rice were found to fall into similar groupings, strengthening the merit of the approach taken. Two additional classes, VI and VII, were established that include proteins with truncated/ interrupted SET domains. Diverse mechanisms are involved in shaping the function and regulation of SET proteins. These include protein-protein interactions through both intra-and inter-molecular associations that are important in plant developmental processes, such as flowering time control and embryogenesis. Alternative splicing that can result in the generation of two to several different transcript isoforms is now known to be widespread. An exciting and tantalizing question is whether, or how, this alternative splicing affects gene function. For example, it is conceivable that one isoform may debilitate methyltransferase function whereas the other may enhance it, providing an opportunity for differential regulation. The review concludes with the speculation that modulation of SET protein function is mediated by antisense or sense-antisense RNA.

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Section: Class Iii: the Trithorax Homologs And Related Proteins (H3k4)mentioning

confidence: 99%

Plant SET domain-containing proteins: Structure, function and regulation

Wang

Chandrasekharan

et al. 2007

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expres

176

195

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“…For a suppressor screen, seeds of the late-flowering msi1-tap1 transgenic line (Bouveret et al, 2006) were mutagenized with ethyl methane sulfonate (EMS; Exner et al, 2009). Flowering time was scored under LD photoperiods for 1,045 M2 families.…”

Section: Isolation Of a New Cry1 Allelementioning

confidence: 99%

“…The line msi1-tap1 (accession Col) has been described before (Bouveret et al, 2006). The EMS allele cry1-L407F (accession Col) was isolated from a mutant screen (this study).…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

A Gain-of-Function Mutation of Arabidopsis CRYPTOCHROME1 Promotes Flowering

et al. 2010

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Plants use different classes of photoreceptors to collect information about their light environment. Cryptochromes are blue light photoreceptors that control deetiolation, entrain the circadian clock, and are involved in flowering time control. Here, we describe the cry1-L407F allele of Arabidopsis (Arabidopsis thaliana), which encodes a hypersensitive cryptochrome1 (cry1) protein. Plants carrying the cry1-L407F point mutation have elevated expression of CONSTANS and FLOWERING LOCUS T under short-day conditions, leading to very early flowering. These results demonstrate that not only the well-studied cry2, with an unequivocal role in flowering promotion, but also cry1 can function as an activator of the floral transition. The cry1-L407F mutants are also hypersensitive toward blue, red, and far-red light in hypocotyl growth inhibition. In addition, cry1-L407F seeds are hypersensitive to germination-inducing red light pulses, but the far-red reversibility of this response is not compromised. This demonstrates that the cry1-L407F photoreceptor can increase the sensitivity of phytochrome signaling cascades. Molecular dynamics simulation of wild-type and mutant cry1 proteins indicated that the L407F mutation considerably reduces the structural flexibility of two solvent-exposed regions of the protein, suggesting that the hypersensitivity might result from a reduced entropic penalty of binding events during downstream signal transduction. Other nonmutually exclusive potential reasons for the cry1-L407F gain of function are the location of phenylalanine-407 close to three conserved tryptophans, which could change cry1's photochemical properties, and stabilization of ATP binding, which could extend the lifetime of the signaling state of cry1.Light determines the plant's life, because light is the essential energy source for plant metabolism. The spatial, temporal, and spectral variability of light provides cues about the time of day, the season, and the presence of competitors for light. Sensitive and precise light perception, therefore, is essential to properly adjust plant development for maximal photosynthetic efficiency, to correlate vegetative and reproductive growth with favorable seasons, and eventually to maximize fitness. To cope with this task, plants have evolved several types of photoreceptors, including the phytochromes and cryptochromes (for review, see Banerjee and Batschauer, 2005;Josse et al., 2008;Mü ller and Carell, 2009). Phytochromes are red and far-red light receptors and regulate different aspects of plant development, such as hypocotyl elongation in red and far-red light and shade avoidance responses (Franklin et al., 2005). In addition, the two major phytochromes in Arabidopsis (Arabidopsis thaliana), phytochrome A (phyA) and phyB, are involved in flowering time control: phyA promotes flowering under short-day (SD) and long-day (LD) photoperiods (Johnson et al., 1994), while phyB acts as a floral inhibitor (Reed et al., 1993;Mockler et al., 1999).Cryptochromes are flavoproteins with two chromoph...

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“…Both EMF-PRC2 and VRN-PRC2 complexes can together control the development of the sporophyte and have a major role in ensuring differentiation and repressing stem cell genes (Bemer and Grossniklaus 2012). The loss of Arabidopsis MSI1 function results in numerous disorders in the vegetative and embryogenic development, leads to defects in shoot apical meristems, floral meristems, primordia and embryo abortion at different developmental stages Köhler et al 2003;Bouveret et al 2006;Schönrock et al 2006;Steinbach and Hennig 2014). In msi mutant plants displayed defects in cell division on early stages of embryogenesis and over-proliferation with deficiency in differentiation of embryos (Köhler et al 2003;Guitton et al 2004), indicating an important role of MSI1 in the zygotic embryo development control.…”

Section: Introductionmentioning

confidence: 99%

Identification of LEC1, L1L and Polycomb Repressive Complex 2 genes and their expression during the induction phase of Medicago truncatula Gaertn. somatic embryogenesis

Orłowska

Igielski

Łagowska

et al. 2016

Plant Cell Tiss Organ Cult

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However, the callus formation was observed in the nonembryogenic line as well, but the LEC1 and L1L genes were not expressed and the transcription of PRC2 genes was at stable level. It was only the SWN expression that decreased at the beginning of induction and did not change in the subsequent days in both lines. Our results indicate that LEC1 and L1L, known as marker genes of the late developmental stages, may be associated with the acquisition of embryogenic competency by somatic cells (prime events in the SE induction). The PRC2 complex genes are also expressed during embryogenic callus tissue formation on Medicago tuncatula leaf explants.

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Regulation of flowering time byArabidopsis MSI1

Cited by 105 publications

References 66 publications

Plant SET domain-containing proteins: Structure, function and regulation

Plant SET domain-containing proteins: Structure, function and regulation

A Gain-of-Function Mutation of Arabidopsis CRYPTOCHROME1 Promotes Flowering

Identification of LEC1, L1L and Polycomb Repressive Complex 2 genes and their expression during the induction phase of Medicago truncatula Gaertn. somatic embryogenesis

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