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RESEARCH HIGHLIGHT
Making sense of the complex role of the mitochondria in mediating the plant touch response
- Pages: 621-622
- First Published: 27 February 2019
RESOURCE
Mitochondrial function modulates touch signalling in Arabidopsis thaliana
- Pages: 623-645
- First Published: 08 December 2018
Previously it was shown that transcript abundance for the stress-induced outer mitochondrial membrane protein of 66 kDa (OM66) was rapidly induced several fold in response to touch. A comprehensive study using a variety of mutants that encoded mitochondrial proteins, defence signalling mutants, kinetic, transcriptome and network analyses, revealed that mitochondrial function modulates touch-induced changes in gene expression directly through altered complex regulatory networks, and indirectly via change in hormonal levels.
ORIGINAL ARTICLES
The Arabidopsis RRM domain protein EDM3 mediates race-specific disease resistance by controlling H3K9me2-dependent alternative polyadenylation of RPP7 immune receptor transcripts
- Pages: 646-660
- First Published: 08 November 2018
We are reporting the identification of the RNA-binding protein EDM3 as a critical contributor to a race-specific disease resistance mechanism in Arabidopsis thaliana. Most importantly, we are providing clear evidence for a direct physical link between the heterochromatic histone H3 lysine 9 dimethylation mark and transcript polyadenylation.
CRISPR/Cas9 mutagenesis in Volvox carteri
- Pages: 661-672
- First Published: 08 November 2018
The multicellular alga Volvox carteri is an attractive model system for investigating developmental mechanisms and their origins. Here we describe a transgene-based CRISPR/Cas9 method for making targeted mutations in this alga and demonstrate its proficiency by knocking out three previously characterized developmental genes.
Candidate gene identification of existing or induced mutations with pipelines applicable to large genomes
- Pages: 673-682
- First Published: 12 November 2018
Classical mutations were introgressed into two maize inbreds with sequenced genomes to use intra-species divergence as an advantage. A computational pipeline was successfully applied to localize the mutations, exemplifying its use for large genomes.
High-resolution insight into recombination events at the SD1 locus in rice
- Pages: 683-692
- First Published: 12 November 2018
By screening 18 000 F2 progeny from a cross between two semi-dwarf cultivars that carry these different defective alleles, we detected 24 GC events, indicating a conversion rate of ~3.3 × 10−4 per marker per generation in a single meiotic cycle in rice.
Genomic dissection of pod shattering in common bean: mutations at non-orthologous loci at the basis of convergent phenotypic evolution under domestication of leguminous species
- Pages: 693-714
- First Published: 13 November 2018
Genetic mapping of the genetic architecture of pod shattering in common bean, and comparisons with other crops, have allowed the genetic basis of phenotypic convergent evolution to be defined. This definition indicates that different genes can be responsible for the shattering phenotype in legumes.
Transcriptional profiling identifies critical steps of cell cycle reprogramming necessary for Plasmodiophora brassicae-driven gall formation in Arabidopsis
- Pages: 715-729
- First Published: 15 November 2018
We describe the changes in host cell cycle gene expression in response to P. brassicae infection, and characterise the impact of key cell cycle regulators (MYB3R4, E2Fa, CCS52A1), establishing that cell proliferation during gall development stems from repression of cell cycle exit, whereas hypertrophy in later disease stages depends on stimulation of endoreduplication. This provides a molecular framework for understanding the progress of clubroot disease and gall formation.
Sunflower resistance to multiple downy mildew pathotypes revealed by recognition of conserved effectors of the oomycete Plasmopara halstedii
- Pages: 730-748
- First Published: 13 November 2018
Five RXLR-type effectors of the sunflower downy mildew pathogen conserved in 17 pathotypes of varying virulence, triggered plant immunity in six broad-spectrum resistant sunflower lines, including two unpublished resistances to all pathotypes. Effector recognition accelerated plant resistance gene identification and fine mapping in complex crop genomes such as sunflower, for which no resistance gene has so far been characterized.
Arabidopsis E2Fc is required for the DNA damage response under UV-B radiation epistatically over the microRNA396 and independently of E2Fe
- Pages: 749-764
- First Published: 14 November 2018
At intensities that can induce DNA damage in Arabidopsis plants, E2Fc-deficient plants show a lower inhibition of leaf size and an altered DNA damage response. The inhibition of plant growth by UV-B mediated by E2Fc occurs epistatically over the microRNA396 and independently of E2Fe.
RESOURCE
In vivo detection of protein cysteine sulfenylation in plastids
- Pages: 765-778
- First Published: 05 November 2018
As a rapid first redox response during oxidative stress, hydrogen peroxide reacts with cysteine thiols on proteins, forming sulfenylated cysteines. We trapped and identified these cysteine-modified proteins in plastids. With the subcellular targeting of the YAP1C probe, we opened the path for defining redox-sensitive pathways at the organellar level.
De novo genome assembly of the stress tolerant forest species Casuarina equisetifolia provides insight into secondary growth
- Pages: 779-794
- First Published: 14 November 2018
We constructed a high-quality draft genome sequence of C. equisetifolia and systematically characterized 29,827 annotated protein-coding genes and 1,983 non-coding genes, respectively. Furthermore, we construct the genome-wide map of DNA modification, such as two novel forms N6-Adenine (6mA) and N4-methylcytosine (4mC), including the genes in the regulation of lignin and cellulose. The high-quality genome resource in this study provides valuable resources to strengthen our understanding of the diverse traits of trees.