Identification of factors regulating leaf inclination reveal a complex regulatory network of lamina joint development, however, the dynamic transcriptional programming of it remain to be elucidated.
Dynamic Cytology and Transcriptional Regulation of Rice Lamina Joint Development.
Specimen part
View SamplesAs a species mostly planted in tropical and subtropical regions, rice is sensitive to chilling temperature, especially at reproductive stage. However, the effect of low temperature on seed development has not been well characterized.
Genome-wide analysis of the complex transcriptional networks of rice developing seeds.
Specimen part, Treatment
View SamplesExpression profiles of protein coding genes were characterized using Affymetrix rice genome array to compare with expression profiles of miRNAs.
Characterization and expression profiles of miRNAs in rice seeds.
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View SamplesWe used microarrays to detail the global programme of gene expression underlying cellularization and identified distinct classes of regulated genes during this process.
Global Analysis Reveals the Crucial Roles of DNA Methylation during Rice Seed Development.
Specimen part
View SamplesThe receptor-like kinases (RLKs) plays critical roles in signal transduction through sensing the extracellular signals and activating the downstream signal transduction by phosphorylating their targets. Up to now, there are only a few RLKs have been functionally identified.
Global analysis of expression profiles of rice receptor-like kinase genes.
Specimen part
View SamplesPlant regeneration could be achieved via formation of a pluripotent cell mass termed callus, nature of which is a group of fast-dividing root primordium cells. However, mechanisms that strictly control the stem cell fate transition in regeneration of callus remain elusive. Here we show that the Arabidopsis ISWI type chromatin remodelers specifically promote the second-step cell fate transition from root founder cells to root primordium cells in the leaf-to-callus transition.
No associated publication
Specimen part
View SamplesThe Arabidopsis thaliana Imitation Switch (AtISWI) subfamily of ATP-dependent chromatin remodeling factors play essential roles in plant development. Here we show that the DDT domain transcription factor RINGLET (RLT) form a complex with AtISWI. RLT1 physically interacts with CHR11 in yeast cells. Single mutants rlt1-1 and rlt2-1 show no obvious developmental defects, while the rlt1-1 rlt2-1 double mutant phenocopies the AtISWI mutant chr11-1 chr17-1. In addtion, the RLT-ISWI complex selectively represses SEPALLATA, FRUITFULL and SUPPRESSOR OF OVEREXPRESSION OF CO 1, but not AGAMOUS and PISTILLATA in leaves.
Imitation Switch chromatin remodeling factors and their interacting RINGLET proteins act together in controlling the plant vegetative phase in Arabidopsis.
Specimen part
View SamplesChromatin remodeling factors of the Imitation Switch (ISWI) family play important roles in epigenetic regulations of gene expression in yeast and animals, whereas their function in plants remains elusive. Here we report characterization of the Arabidopsis ISWI genes CHR11 and CHR17. Double mutant chr11 chr17 displayed a dramatically reduced plant size with early flowering. In addition, epidermis of the double mutant leaves showed cell characteristics seen only in floral organs. These phenotypes resemble, at least partially, those of the Polycomb mutants curly leaf (clf) and like heterochromatin protein1 (lhp1). Microarray analysis revealed that a number of targets of the Polycomb pathway were derepressed in chr11 chr17 leaves. Furthermore, triple mutants combining chr11 chr17 with clf-29 or lhp1-6 both greatly enhanced clf-29 and lhp1-6 phenotypes, respectively. All these results strongly suggest that the ISWI family genes in Arabidopsis may function in gene silencing via the Polycomb pathway
Imitation Switch chromatin remodeling factors and their interacting RINGLET proteins act together in controlling the plant vegetative phase in Arabidopsis.
Age, Specimen part
View SamplesCallus formation is usually a necessary step in regenerating a new plant from detached plant tissues, and the nature of the callus is similar to that of the root meristem. In this study, we intended to address the molecular basis that directs different plant tissues to form the root-meristem-like callus. We found that leaves, but not roots, of the Polycomb group (PcG) double mutant curly leaf-50 swinger-1 lost the ability to form a callus. Using ChIP-chip analysis, we identified genes that are changed markedly in the histone H3 lysine 27 trimethylation (H3K27me3) levels during callus formation from leaf explants. Among these genes, a number of leaf-regulatory genes were repressed through PcG-mediated H3K27me3. Conversely, certain auxin pathway genes and many root-regulatory genes were derepressed through H3K27 demethylation. Our data indicate that genome-wide H3K27me3 reprogramming, through the PcG-mediated H3K27me3 and the H3K27 demethylation pathways, is critical in directing cell fate transition.
Reprogramming of H3K27me3 is critical for acquisition of pluripotency from cultured Arabidopsis tissues.
Age, Specimen part
View SamplesDrought and salinity are two main abiotic-stresses negatively affecting crop growth and productivity worldwide with largely decreasing crop yields. The understanding of plant responses to stresses in physiology, genetics, and molecular biology will be greatly helpful to improve the tolerance of crops to abiotic-stresses through genetic engineering.To identify the genetic loci that control drought and salt tolerance in rice, we performed a large-scale screen for the mutants with altered drought and salt tolerance. A drought and salt tolerance (dst) mutant line was isolated.In this series, we compare the transcriptome of wild-type plant Zhonghua11 and dst mutants under the normal growth conditions.
A previously unknown zinc finger protein, DST, regulates drought and salt tolerance in rice via stomatal aperture control.
Age
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