Project description:Transcriptomic analysis of single, double and triple mutant anthers of bhlh010, bhlh089 and bhlh091. We examine here three recently duplicated Arabidopsis bHLH genes, bHLH010, bHLH089 and bHLH091, using evolutionary, genetic, morphological and transcriptomic approaches, and uncover their redundant functions in anther development. These three genes are relatively highly expressed in the tapetum of the Arabidopsis anther; single mutants at each of the bHLH010, bHLH089 and bHLH091 loci are developmentally normal, but the various double and triple combinations progressively exhibit increasingly defective anther phenotypes (abnormal tapetum morphology, delayed callose degeneration, and aborted pollen development), indicating their redundant functions in male fertility. Note: Samples in SRA were assigned the same sample accession. This is incorrect as there are different samples, hence “Source Name” was replaced with new values. Comment[ENA_SAMPLE] contains the original SRA sample accessions.
Project description:Using the HiSeqTM 2000 sequencing platform, the anther transcriptome of photo thermo sensitive genic male sterile lines (PTGMS) rice Y58S and P64S (Peiâai 64S) were analyzed at the fertility sensitive stage under cold stress.These datas would be most beneficial for further studies investigating the molecular mechanisms of rice responses to cold stress.
Project description:The purpose of this study was to measure DNA methylation and siRNA expression across the maize genome. The experimental data was derived from shotgun bisulfite sequencing, siRNA sequencing, and mRNA sequencing (Illumina, single end for all three)
Project description:In this study, we investigated novel rice genes that are expressed in aleurone cells by RNA-seq. RNA-seq was performed on four samples: a control sample, and samples treated with ABA, GA, and a mixture of the two hormones.
Project description:In this study we used single-cell type transcriptomics to identify more than 4,000 differentially expressed (DE) genes that distinguish uniplanar protonematal tip cells from multiplanar gametophore bud cells in the moss Physcomitrella patens. While the transcriptomes of both tip and bud cells harbor molecular signatures of proliferative cells, the bud cell transcriptomes exhibit a wider variety of upregulated genes. Our data suggest that the combined expression of genes regulating shoot patterning and asymmetric cell division accompanied the transition from uniplanar to triplanar meristematic growth in moss.
Project description:Members of the ARGONAUTE gene family are known to have roles in RNA-mediated silencing during development. One of these, MEL1, was shown to be germ-cell specific and essential for progression through sporogenesis at both premeiotic mitosis and meiosis. To understand how the MEL1 gene product is responsible for these effects requires analysis of the changes of the transcriptome. The mel1 gene was identified by TOS 17 insertion mutagenesis of Oryza sativa Japonica, cultivar Nipponbare. The TOS 17 insertion line of mel1 and the wild-type parent were the sources of RNA. RNA was extracted from rice panicle (3 cM) of rice grown under natural conditions in rice fields. Small RNAs associated with MEL1 and small RNAs in total RNA were sequenced by Illumina GAII.
Project description:We used heat shock (HS) treatments and high-throughput mRNA sequencing to obtain HS transcriptomes in the moss Physcomitrella patens. Besides revealing differential gene expression at the transcriptional level, a transcriptome survey identified abundant AS events in the single-cellâtype, undifferentiated, moss protonemal cell. For preparing RNA-seq samples, protonemal colonies were grown at 38°C for 1 h (1st HS), recovered at 25°C for 5.5 h, and then grown at 38°C again for 1 h (2nd HS). Cells remaining at 25°C were collected as the control. Note: All samples in SRA were assigned the same sample accession (SRS402930). This is incorrect as there are different samples, hence âSource Nameâ was replaced with new values. Comment[ENA_SAMPLE] contains the original SRA sample accessions.
Project description:In flowering plants, knotted1-like homeobox (KNOX) transcription factors play crucial roles in establishment and maintenance of the shoot apical meristem (SAM), from which aerial organs such as leaves, stems and flowers initiate. We report that a rice (Oryza Sativa) KNOX gene Oryza sativa homeobox1 (OSH1) represses the brassinosteroid (BR) phytohormone pathway through activation of BR catabolism genes. Inducible overexpression of OSH1 caused brassinosteroid insensitivity, whereas loss-of-function showed a BR-overproduction phenotype. Genome-wide identification of loci bound and regulated by OSH1 revealed hormonal and transcriptional regulation as the major function of OSH1. Among these targets, BR catabolism genes CYP734A2, CYP734A4 and CYP734A6 were rapidly up-regulated by OSH1-induction. Furthermore, RNAi knockdown plants of CYP734A genes arrested growth of the SAM and mimicked some osh1 phenotypes. Thus, we suggest that local control of BR levels by KNOX genes is a key regulatory step in SAM function.
Project description:The hemibiotrophic fungus Zymoseptoria tritici causes Septoria tritici blotch disease of wheat (Triticum aestivum). Pathogen reproduction on wheat occurs without cell penetration, suggesting that dynamic and intimate intercellular communication occurs between fungus and plant throughout the disease cycle. We used deep RNA sequencing and metabolomics to investigate the physiology of plant and pathogen throughout an asexual reproductive cycle of Z. tritici on wheat leaves. Over 3,000 pathogen genes, more than 7,000 wheat genes, and more than 300 metabolites were differentially regulated. Intriguingly, individual fungal chromosomes contributed unequally to the overall gene expression changes. Early transcriptional down-regulation of putative host defense genes was detected in inoculated leaves. There was little evidence for fungal nutrient acquisition from the plant throughout symptomless colonization by Z. tritici, which may instead be utilizing lipid and fatty acid stores for growth. However, the fungus then subsequently manipulated specific plant carbohydrates, including fructan metabolites, during the switch to necrotrophic growth and reproduction. This switch coincided with increased expression of jasmonic acid biosynthesis genes and large-scale activation of other plant defense responses. Fungal genes encoding putative secondary metabolite clusters and secreted effector proteins were identified with distinct infection phase-specific expression patterns, although functional analysis suggested that many have overlapping/redundant functions in virulence. The pathogenic lifestyle of Z. tritici on wheat revealed through this study, involving initial defense suppression by a slow-growing extracellular and nutritionally limited pathogen followed by defense (hyper) activation during reproduction, reveals a subtle modification of the conceptual definition of hemibiotrophic plant infection.