Rice global gene expression profile in response to plant hormones
Ontology highlight
ABSTRACT:
ORGANISM(S): Oryza sativa Oryza sativa Japonica Group
PROVIDER: GSE39429 | GEO | 2012/12/03
SECONDARY ACCESSION(S): PRJNA170876
REPOSITORIES: GEO
Similar Datasets
Project description:A time course gene expression profiling of rice treated with various plant hormones (abscisic acid, gibberelin, auxin, brassinosteroid, cytokinin and jasmonic acid) was performed to obtain an overall signature of the rice transcriptome in response to each phytohormone. The transcriptome of rice seedlings treated with various plant hormones such as abscisic acid (ABA), gibberellic acid 3 (GA3), indole-3-acetic acid (IAA), brassinolide (BL), trans-zeatin (tZ), and jasmonic acid (JA) was characterized by microarray analysis. Seven-day old seedlings were transferred in culture solutions with specific hormones and in culture solution without hormone to serve as control (mock treatment). Root samples were collected and analyzed in three replicates at pretreatment (control) and after 15 min, 30 min, 1 h, 3 h and 6 h incubation in culture solutions with each hormone. Shoot samples were collected and analyzed in two replicates at pretreatment (control) and after 1 h, 3 h, 6 h and 12 h incubation culture solutions with each hormone. A total of 93 microarray data for root and 50 microarray data for shoot were obtained.
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Project description:Phytohormones are involved in diverse aspects of plant life including the regulation of plant growth, development and reproduction, as well as governing stress and defence responses. We have generated a comprehensive transcriptional reference map of the early potato responses to exogenous application of the defence hormones abscisic acid, brassinosteroid, ethylene, salicylic acid and jasmonic acid. Amongst microarray probes representing the 39000 predicted genes, a total of 3175 and 2873 probes were significantly differentially expressed at 1 h and 6 h after hormone treatment, respectively. Marker genes identified for the early hormone responses in potato include: a homeodomain 20 transcription factor (DMG400000248) for abscisic acid; a SAUR gene (DMG400016561) induced in Epibrassinolide treated plants at 6 hours; an osmotin gene (DMG400003057) specifically enhanced by the ethylene precursor aminocyclopropanecarboxylic acid; a gene weakly similar to AtWRKY40 (DMG402007388) that was induced by salicylic acid and; a jasmonate ZIM-domain protein 1 (DMG400002930) which was specifically activated by methyl jasmonate. An online database has been set up to query the expression patterns of potato genes represented on the microarray that can also incorporate future microarray or RNAseq-based expression studies.
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Project description:Hormones effect various plant developmental processes by altering gene expression. The expression of several genes is regulated by plant hormones and many of these genes are regulated commonly and specifically by various hormones. We used microarrays to study the global effect of plant hormones on rice gene expression and identify the genes involved in operlapping and specific transcriptional responses. Rice seedlings of IR64 variety were grown hydroponically for 7-days in a culture room with a daily photoperiodic cycle of 14h light and 10h dark. Seedlings were incubated in water (control) or 50 µM solution of indole-3-acetic acid (auxin, IAA) and benzyl aminopurine (cytokinin, BAP) and 100 µM solution of abscisic acid (ABA), 1-aminocyclopropane-1-carboxylic acid (ethylene derivative, ACC), salicylic acid (SA) and jasmonic acid (JA) for 3h. The 5 micrograms of total RNA sample isolated from each tissue sample was processed for microarray analysis according to Affymetrix protocol. Two biological replicates for each sample (two controls, IAA, BAP, ABA, ACC, SA and JA) were used for microarray analysis.
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Project description:Plant height and grain size are important agronomic traits affecting rice yield. Various plant hormones participate in the regulation of plant height and grain size in rice. However, how these hormones cooperate to regulate plant height and grain size is poorly understood. In this study, we identified a brassinosteroid-related gene, hfr131, from an introgression line constructed using Oryza longistaminata, that caused brassinosteroid insensitivity and reduced plant height and grain length in rice. Further study showed that hfr131 is a new allele of OsBRI1 with a single-nucleotide polymorphism (G to A) in the coding region, leading to a T988I conversion at a conserved site of the kinase domain. An auxin response factor, OsARF17, could bind to the promoter region of HFR131 and positively regulated HFR131 expression, thereby regulating the plant height and grain length, and influencing brassinosteroid sensitivity. Haplotype analysis showed that the consociation of OsAFR17Hap1/HFR131Hap6 conferred an increase in grain length. Overall, this study identified hfr131 as a new allele of OsBRI1 that regulates plant height and grain length in rice, revealed that brassinosteroid and auxin might coordinate through OsARF17–HFR131 interaction, and provided a potential breeding target for improvement of rice yield.
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