Transcriptomic, proteomic and metabolomic analysis of UV-B signaling in maize
Ontology highlight
ABSTRACT:
ORGANISM(S): Zea mays
SUBMITTER: John Fernandes
PROVIDER: E-GEOD-25038 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:This study looked for signals produced in UV-B irradiated leaves, and possibly induced in shielded leaves, that modulate physiological responses in maize. Transcriptome and proteomics profiling tracked changes in exposed and shielded organs. Metabolic profiling was examined for signaling molecules. Exposure of just the top leaf substantially alters the transcriptome of both irradiated and shielded organs, with greater changes as an additional 1-2 leaves are irradiated. Transcriptome, proteome and metabolome changes are UV-B regulated in shielded organs. Early steps in signal transduction and possible signal molecules are identified utilizing a time course experiment. Keywords: UVB, maize, leaves, ears
2011-02-01 | GSE25038 | GEO
Project description:This study looked for early response signals produced in UV-B irradiated leaves and induced in shielded leaves and shielded ears that modulate physiological responses in maize. Transcriptome profiling tracked changes in exposed and shielded organs. Metabolic profiling was examined for signaling molecules. The top 2 leaves were exposed to 10, 30, or 60 minutes of ~3x normal UV-B and then tissue samples were taken from all 3 tissue types. Over 250 transcripts are differentially expressed at least 2 fold in irradiated leaves by 10 min of UV-B. At 30 min this decreased to ~150 then increased to over 500 transcripts at 60 min. Different pathways are affected at the various time exposures and specific responses are modulated by the time of exposure. Shielded leaves had a smaller number of transcripts affected at each time point but over 60% were in common with the irradiated leaves results at 10 min. and ~20% overlaps were found at 30 and 60 min. Metabolite samples were analyzed after 5, 10, 15, 30, and 90 min of UV-B. We identified 14 compounds with a statistically significant change from untreated plants in at least one time point. Compared transciptomes of irradiated leaves, shielded leaves, and shielded ears from plants whose top 2 leaves were exposed to ~3x normal UV-B for 10, 30, and 60 minutes.
2011-07-30 | E-GEOD-30278 | biostudies-arrayexpress
Project description:This study looked for early response signals produced in UV-B irradiated leaves and induced in shielded leaves and shielded ears that modulate physiological responses in maize. Transcriptome profiling tracked changes in exposed and shielded organs. Metabolic profiling was examined for signaling molecules. The top 2 leaves were exposed to 10, 30, or 60 minutes of ~3x normal UV-B and then tissue samples were taken from all 3 tissue types. Over 250 transcripts are differentially expressed at least 2 fold in irradiated leaves by 10 min of UV-B. At 30 min this decreased to ~150 then increased to over 500 transcripts at 60 min. Different pathways are affected at the various time exposures and specific responses are modulated by the time of exposure. Shielded leaves had a smaller number of transcripts affected at each time point but over 60% were in common with the irradiated leaves results at 10 min. and ~20% overlaps were found at 30 and 60 min. Metabolite samples were analyzed after 5, 10, 15, 30, and 90 min of UV-B. We identified 14 compounds with a statistically significant change from untreated plants in at least one time point.
2011-07-31 | GSE30278 | GEO
Project description:Microarray hybridization was used to assess UV-B responses in both directly exposed and shielded tissues of a maize line deficient in anthocyanin accumulation. Among 347 transcripts found to be regulated after 8 h of high UV-B irradiation, 285 were increased significantly in at least one organ but only 80 were down-regulated by UV-B. Although some genes were regulated by UV-B in more than one sample, most UV-B regulated genes were organ-specific. A larger number of transcript changes occurred in directly exposed than in shielded organs, and more transcripts levels were changed in adult than in seedling tissues. Because shielded tissues including roots, immature ears, and leaves covered with a plastic that absorbs UV-B exhibited altered transcriptome profiles after plant exposure to UV-B, some signal(s) must be transmitted from irradiated to shielded tissues. The time course of transcript abundance changes monitored by RNA blot hybridization and real time RT-PCR indicated that the response kinetics to UV-B are very rapid as some transcript levels are altered within 1 h exposure, in both exposed and shielded tissues. As the same total UV-B irradiation dose applied at three intensities elicited different transcript profiles, transcriptome changes do not show reciprocity. Confirming and extending prior microarray hybridization results, supplemental UV-B increased expression of stress response and ribosomal protein genes, while photosynthesis-associated genes were down regulated in adult leaves. Keywords: other
2003-10-29 | GSE671 | GEO
Project description:A maize array was fabricated with 5,376 unique expressed sequence tag (EST) clones sequenced from 4-day-old roots, immature ears and adult organ cDNA libraries. To elucidate organ relationships, relative mRNA levels were quantified by hybridization with embryos, three maize vegetative organs (leaf blades, leaf sheaths and roots) from multiple developmental stages, husk leaves and two types of floral organs (immature ears and silks). Clustering analyses of the hybridization data suggest that maize utilizes both the PEPCK and NADP-ME C(4) photosynthetic routes as genes in these pathways are co-regulated. Husk RNA has a gene-expression profile more similar to floral organs than to vegetative leaves. Only 7% of the genes were highly organ specific, showing over a fourfold difference in at least one of 12 comparisons and 37% showed a two- to fourfold difference. The majority of genes were expressed in diverse organs with little difference in transcript levels. Cross-hybridization among closely related genes within multigene families could obscure tissue specificity. As a first step in elucidating individual gene-expression patterns, we show that 45-nucleotide oligo probes produce signal intensities and signal ratios comparable to PCR probes on the same matrix. Gene-expression profile studies with cDNA microarrays provide a new molecular tool for defining plant organs and their relationships and for discovering new biological processes in silico. cDNA microarrays are insufficient for differentiating recently duplicated genes. Gene-specific oligo probes printed along with cDNA probes can query individual gene-expression profiles and gene families simultaneously. Keywords: other
2003-01-08 | GSE141 | GEO
Project description:A maize array was fabricated with 5,376 unique expressed sequence tag (EST) clones sequenced from 4-day-old roots, immature ears and adult organ cDNA libraries. To elucidate organ relationships, relative mRNA levels were quantified by hybridization with embryos, three maize vegetative organs (leaf blades, leaf sheaths and roots) from multiple developmental stages, husk leaves and two types of floral organs (immature ears and silks). Clustering analyses of the hybridization data suggest that maize utilizes both the PEPCK and NADP-ME C(4) photosynthetic routes as genes in these pathways are co-regulated. Husk RNA has a gene-expression profile more similar to floral organs than to vegetative leaves. Only 7% of the genes were highly organ specific, showing over a fourfold difference in at least one of 12 comparisons and 37% showed a two- to fourfold difference. The majority of genes were expressed in diverse organs with little difference in transcript levels. Cross-hybridization among closely related genes within multigene families could obscure tissue specificity. As a first step in elucidating individual gene-expression patterns, we show that 45-nucleotide oligo probes produce signal intensities and signal ratios comparable to PCR probes on the same matrix. Gene-expression profile studies with cDNA microarrays provide a new molecular tool for defining plant organs and their relationships and for discovering new biological processes in silico. cDNA microarrays are insufficient for differentiating recently duplicated genes. Gene-specific oligo probes printed along with cDNA probes can query individual gene-expression profiles and gene families simultaneously.
2003-01-07 | E-GEOD-141 | biostudies-arrayexpress
Project description:Differential expression of microRNAs was studied in maize leaves after an 8-h-exposure under UV-B light. As a control, plants were kept in the greenhouse in the absence of UV-B
2013-10-31 | GSE19768 | GEO
Project description:UV-B radiation affects leaf growth in a wide range of species. In this work, we demonstrate that UV-B levels present in solar radiation inhibits maize leaf growth without causing any other visible stress symptoms, including accumulation of DNA damage. We conducted kinematic analyses of cell division and expansion to understand the impact of UV-B radiation on these cellular processes. Our results demonstrate that the decrease in leaf growth is a consequence of a reduction in cell production, and a shortened growth zone (GZ) in UV-B irradiated leaves. To determine the molecular pathways involved in UV-B inhibition of leaf growth, we performed RNA sequencing on isolated GZ tissues of control and UV-B exposed plants. Our results show a link between the observed leaf growth inhibition and the expression of specific cell cycle and developmental genes, including Growth Regulating Factors (GRFs) and transcripts for proteins participating in different hormone pathways.
2017-05-18 | GSE95858 | GEO
Project description:Small RNAs (21-24 nt) are pivotal regulators of gene expression that guide both transcriptional and post-transcriptional silencing mechanisms in diverse eukaryotes, including most if not all plants. MicroRNAs (miRNAs) and short interfering RNAs (siRNAs) are the two major types, both of which have a demonstrated and important role in plant development, stress responses and pathogen resistance. In this work, we used a deep sequencing approach (Sequencing-By-Synthesis, or SBS) to develop sequence resources of small RNAs from different maize tissues (including leaves, ears and tassels) collected from wild-type plants of the B73 variety. The high depth of the resulting datasets enabled us to examine in detail critical small RNA features as size distribution, tissue-specific regulation and sequence conservation between different organs in this species. We also developed database resources and a dedicated website (http://smallrna.udel.edu/) with computational tools for allowing other users to identify new miRNAs or siRNAs involved in specific regulatory pathways, verify the degree of conservation of these sequences in other plant species and map small RNAs on genes or larger regions of the maize genome under study. Small RNA libraries were derived from leaves, ears and tassels of maize variety B73 (wild-type). Plants were grown in a flood irrigated plot at the University of Arizona (Tucson, AZ, USA) in 2007 and organs were pooled from several plants for each library. Young leaves were collected from 6-weeks-old seedlings. Post-meiotic immature ears were harvested from 10- and 11-week old plants while pre-meiotic tassels were collected from 8-week old plants. Total RNA was isolated using the Plant RNA Purification Reagent (Invitrogen) and submitted to Illumina (Hayward, CA, http://www.illumina.com) for small RNA library construction using approaches described in (Lu et al., 2007) with minor modifications. The small RNA libraries were sequenced with the Sequencing-By-Synthesis (SBS) technology by Illumina. PERL scripts were designed to remove the adapter sequences and determine the abundance of each distinct small RNA. We thank Lyudmila Sidorenko and Vicki Chandler for providing the plant material and Kan Nobuta for assistance with the computational methods.
2009-12-31 | E-GEOD-17339 | biostudies-arrayexpress
Project description:To initiate a genomic scale analysis of high altitude maize, we performed expression-profiling experiments using Unigene I cDNA arrays from the Maize Gene Discovery Project that contain 5664 cDNAs printed in triplicate spots; a triplicate set for nearly all cDNAs was printed in at least one additional location on each slide, thus there is a minimum of 6 spots for each cDNA per slide. Four-week-old maize plants grown in the field under the three irradiation regimes no UV-B, solar UV-B or UV-B supplemental were used for the experiments. Samples were collected from adult leaves 9 and 10; samples from 6 plants were pooled for preparation of poly(A)+ RNA. Keywords: parallel sample
2005-01-20 | GSE1807 | GEO