Identification of RNA-dependent DNA-methylation regulated promoters in Arabidopsis

Baev, Vesselin; Naydenov, Mladen; Apostolova, Elena; Ivanova, Desislava; Doncheva, Slaveya; Minkov, Ivan; Yahubyan, Galina

doi:10.1016/j.plaphy.2010.03.013

Cited by 18 publications

(18 citation statements)

References 46 publications

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“…1a); therefore, it is likely that CML41 plays a similar role in PD flux regulation when challenged with soil bacterial pathogens. An investigation is also warranted into: the role of CML41 in the other tissues in which it is expressed such as senescent leaves and flowers (McCormack et al ., 2005); and, the significance of its transcriptional regulation by RNA‐dependent methylation (Baev et al ., 2010). …”

Section: Resultsmentioning

confidence: 99%

A calmodulin‐like protein regulates plasmodesmal closure during bacterial immune responses

et al. 2017

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Summary Plants sense microbial signatures via activation of pattern recognition receptors (PPRs), which trigger a range of cellular defences. One response is the closure of plasmodesmata, which reduces symplastic connectivity and the capacity for direct molecular exchange between host cells.Plasmodesmal flux is regulated by a variety of environmental cues but the downstream signalling pathways are poorly defined, especially the way in which calcium regulates plasmodesmal closure.Here, we identify that closure of plasmodesmata in response to bacterial flagellin, but not fungal chitin, is mediated by a plasmodesmal‐localized Ca2+‐binding protein Calmodulin‐like 41 (CML41). CML41 is transcriptionally upregulated by flg22 and facilitates rapid callose deposition at plasmodesmata following flg22 treatment. CML41 acts independently of other defence responses triggered by flg22 perception and reduces bacterial infection.We propose that CML41 enables Ca2+‐signalling specificity during bacterial pathogen attack and is required for a complete defence response against Pseudomonas syringae.

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Section: Resultsmentioning

confidence: 99%

A calmodulin‐like protein regulates plasmodesmal closure during bacterial immune responses

et al. 2017

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“…Alterations to epigenomes, whether genome-wide (31)(32)(33)(34) or at a single locus (20,(35)(36)(37), can lead to widespread changes in gene expression. Of particular interest were epi-loci in the hybrids with altered methylation patterns in upstream sequences, as differences in promoter methylation affect gene expression levels more than does gene body methylation (31).…”

Section: Altered Sirna Levels Lead To Changed Levels Of Methylation Inmentioning

confidence: 99%

Changes in 24-nt siRNA levels in Arabidopsis hybrids suggest an epigenetic contribution to hybrid vigor

Groszmann

Greaves²,

Albertyn³

et al. 2011

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

286

252

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Intraspecific hybrids between the Arabidopsis thaliana accessions C24 and Landsberg erecta have strong heterosis. The reciprocal hybrids show a decreased level of 24-nt small RNA (sRNA) relative to the parents with the decrease greatest for those loci where the parents had markedly different 24-nt sRNA levels. The genomic regions with reduced 24-nt sRNA levels were largely associated with genes and their flanking regions indicating a potential effect on gene expression. We identified several examples of genes with altered 24-nt sRNA levels that showed correlated changes in DNA methylation and expression levels. We suggest that such epigenetically generated differences in gene activity may contribute to hybrid vigor and that the epigenetic diversity between ecotypes provides increased allelic (epi-allelic) variability that could contribute to heterosis.yield increase | epigenome | transposons | transacting siRNA | transmethylation

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“…1a) in all four libraries. In plants, 24 nt long RNAs are usually derived from transposable elements and repetitive sequences and function as guide RNAs in transcriptional silencing (TGS) (Baev et al 2010). However, only a small number of reads from our cDNA libraries (1-3 %) could be mapped to the collection of maize repetitive elements obtained from RepBase (Jurka 2000).…”

Section: Results Cdna Librariesmentioning

confidence: 99%

Expression of miRNAs involved in phosphate homeostasis and senescence is altered in glyphosate-treated maize

et al. 2015

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Glyphosate is a systemic, nonselective and most widely used herbicide in the world. The introduction of glyphosate-resistant crops in the mid-1990s resulted in a dramatic increase in the use of glyphosate herbicide making it most widely used herbicide in the world. The average maize yield loss in the field caused by pests is around 20 % but in many regions it is much higher. It is now clear that glyphosate causes broader range of physiological alterations than previously assumed and some plants gain higher level of resistance to glyphosate without the need to use genetic engineering methods. To understand the mechanisms of such heightened resistance we must first know the processes mediating the plants' death in response to glyphosate treatment. Here, we show that 12 miRNAs, belonging to miR167, miR396, miR159, miR156, miR169, miR444 and miR827 families, are significantly upregulated, and one, miR166, downregulated following glyphosate treatment. These miRNAs have been previously shown to be involved in abiotic stress responses and implicated in senescence. Strikingly, two of the induced miRNAs, miR444 and miR827, have been shown to regulate phosphate transport pathways, which seem to be common for Pi and glyphosate uptake.

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Identification of RNA-dependent DNA-methylation regulated promoters in Arabidopsis

Cited by 18 publications

References 46 publications

A calmodulin‐like protein regulates plasmodesmal closure during bacterial immune responses

A calmodulin‐like protein regulates plasmodesmal closure during bacterial immune responses

Changes in 24-nt siRNA levels in Arabidopsis hybrids suggest an epigenetic contribution to hybrid vigor

Expression of miRNAs involved in phosphate homeostasis and senescence is altered in glyphosate-treated maize

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