Abscisic acid regulates plant growth and flowering through SINGLE FLOWER TRUSS pathway in tomato.
Ontology highlight
ABSTRACT:
ORGANISM(S): Solanum pimpinellifolium
PROVIDER: GSE45243 | GEO | 2014/04/01
SECONDARY ACCESSION(S): PRJNA193310
REPOSITORIES: GEO
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Project description:Abscisic acid (ABA) regulates seed and bud dormancy. We show by forward and reverse genetic analysis that the tomato transcription factor SlZFP2 is required for release of bud and seed dormancy through negative regulation of ABA biosynthesis. We also demonstrated that ABA promotes growth and represses flowering in tomato both through transcriptional control on the florigen-encoding gene SINGLE FLOWER TRUSS (SFT) in tomato. To gain further insight on transcriptome changes by overexpresion of HA-SlZFP2, we sequenced two lines of p35S:HA-SlZFP2 in LA1589 background and their nontransgenic siblings on Illumina Hiseq2000 platform. Two homozygous transgenic lines 103 and 104 showing very similar phenotypes in flowering and branching were chosen for profiling gene expression via RNA sequencing. Their respective nontransgenic siblings were served as controls (103N and 104N).
2014-04-01 | E-GEOD-45243 | biostudies-arrayexpress
Project description:affy_sunflower_2010_13 - affy_sunflower_2010_13 - It concerns the interaction between ROS and hormones in dormancy release in sunflower seeds. ABA is responsible for dormancy maintenance, while GA and ethylene promote seed germination. Based on our results, ROS could represent good candidate to shift from a hormone signalling to another determining the dormancy state in sunflower seeds.-We aim to understand the mechanisms controlling sunflower seed dormancy at the transcriptomic level, by the application of treatments which maintain dormancy as ABA, or alleviate dormancy as ROS and ethylene. Transcripts comparison will be performed between dormant and non-dormant sunflower embryo imbibed 24h on water, on ABA, on methylviologen, a pro-oxidant compound or on ethylene.
2013-08-01 | GSE44165 | GEO
Project description:affy_sunflower_2010_13 - affy_sunflower_2010_13 - It concerns the interaction between ROS and hormones in dormancy release in sunflower seeds. ABA is responsible for dormancy maintenance, while GA and ethylene promote seed germination. Based on our results, ROS could represent good candidate to shift from a hormone signalling to another determining the dormancy state in sunflower seeds.-We aim to understand the mechanisms controlling sunflower seed dormancy at the transcriptomic level, by the application of treatments which maintain dormancy as ABA, or alleviate dormancy as ROS and ethylene. Transcripts comparison will be performed between dormant and non-dormant sunflower embryo imbibed 24h on water, on ABA, on methylviologen, a pro-oxidant compound or on ethylene. 12 arrays - SUNFLOWER; treated vs untreated comparison
2013-08-01 | E-GEOD-44165 | biostudies-arrayexpress
Project description:Abscisic acid (ABA) regulates abiotic stress and developmental responses including regulation of seed dormancy to prevent seeds from germinating under unfavorable environmental conditions. ABA HYPERSENSITIVE GERMINATION1 (AHG1) encoding a type 2C protein phosphatase (PP2C) is a central negative regulator of the ABA response in germination; however, the molecular function and regulation of AHG1 remain elusive. Here we report that AHG1 interacts with DELAY OF GERMINATION1 (DOG1), which is a pivotal positive regulator in seed dormancy. DOG1 acts upstream of AHG1 and impairs the PP2C activity of AHG1 in vitro. Furthermore, DOG1 has the ability to bind heme. Binding of DOG1 to AHG1 and heme are independent processes but both are essential for DOG1 function in vivo. Our study demonstrates that AHG1 and DOG1 constitute an important regulatory system for seed dormancy and germination by integrating multiple environmental signals, in parallel with the PYL/RCAR ABA receptor-mediated regulatory system.
2018-06-10 | PXD009392 | Pride
Project description:Seed germination is a major step of plant growth and development. It is critical for species competition and spreading capacity in ecosystems. In agrosystems, it eventually impacts crop growth and yield. To prevent unappropriated germination under environmental conditions that do not guarantee the establishment of a robust plantlet, seeds from temperate species are generally dormant at maturity. Dormancy is a physiological mechanism that blocks seed germination even under favorable conditions and dormancy release is therefore required prior to germination [1]. A range of environmental (e.g. temperature, light, oxygen availability) and endogenous (e.g. hormonal) signals regulate these processes and germination completion, i.e. the early emergence of embryo radicle from seed envelope, can be achieved only when promoting mechanisms overcome inhibiting processes [2]. In that sense, the balance between the two antagonistic hormones abscisic acid (ABA) and gibberellins (GA), that inhibit and stimulate seed germination, respectively, promotes either dormancy (high ABA and low GA contents) or germination (low ABA and high GA contents) [3]
2022-07-06 | PXD033347 | Pride
Project description:The molecular mechanism of seed morphophysiological dormancy of Epimedium pseudowushanense B.L.Guo. remains largely unknown. The endogenous ABA and GA content of E. pseudowushanense seeds at three developmental stages was quantitatively determined. The result showed the levels of ABA in E. pseudowushanense seeds decreased during the seed embryo growing and development, levels of GA3 increased during seed embryo growing, and levels of GA4 increased during seed dormancy releasing and seed sprouting. High-throughput sequencing method was used for reveal the E. pseudowushanense seed transcriptome. The transcriptome data were assembled as 178,613 unigenes and the numbers of differentially expressed unigenes between the seed development stages were compared. By computer analysis of the KEGG reference pathways, twelve candidate genes were likely to be involved in metabolism and signaling of abscisic acid and gibberellins. The expression patterns of these genes were revealed by real-time quantitative RT-PCR. Phylogenetic relationships among the deduced E. pseudowushanense proteins and their homologous in other plant species were analyzed. The results indicate EpNCED1, EpNCED2, EpCYP707A1 and EpCYP707A2 are likely to be involved in ABA biosynthesis and catabolism. EpSnRK2 is likely implicated in ABA signaling during seed dormancy. EpGA3ox is likely to be involved in gibberellin biosynthesis, and EpDELLA1 and EpDELLA2 are likely implicated in GA signaling. This study was the first to provide the E. pseudowushanense seed transcriptome and the key genes involved in metabolism and signaling of abscisic acid and gibberellins, and so it is valuable for studies on seed morphophysiological dormancy mechanism
2018-05-21 | GSE79474 | GEO
Project description:We studied differences in gene expression between Populus P35S::EBB1 lines and control, affecting plant growth and differentiation, and dormancy. We used microarrays to detail the global program of gene expression underlying morphological and developmental changes driven by overexpression of the EBB1 gene. By screening activation tagging population, we identified the EARLY BUD-BREAK1 (EBB1) mutant. We positioned the tag, localized a putative candidate gene and verified transcription activation. The activated gene encodes an AP2/ERF transcription factor similar to a small B1 gene-subfamily in Arabidopsis encoding strong regulators of meristem function and lateral organ outgrowth. We fully recapitulated the phenotype by overexpression of the gene into the same genotype under a strong constitutive promoter (P35S::EBB1). We also found that EBB1 transcript abundance in wild type plants increases during the period prior to bud-break, and in response to the hormone cytokinin. Our data indicates that EBB1 plays an important role in the process of bud-break. Poplar apex was selected for RNA extraction and hybridization on Affymetrix microarrays. We sought to obtain homogeneous native expression of affected genes in P35S::EBB1 lines and control, in order to increase the resolution of expression profiles inducing the developmental changes in P35S::EBB1. To do that, we selected apex tissue from greenhouse healthy plants.
2010-05-27 | E-GEOD-16495 | biostudies-arrayexpress
Project description:Along with the inherent complexities of seed and dormancy, the use of different genotypes or mutants to study the molecular mechanisms underlying seed dormancy leads to potential biases and data misinterpretation. To provide a comprehensive insight into the actual protein activities involved in seed dormancy establishment, a SWATH-MS proteomics was performed on dormant and non-dormant developing seeds of Xanthium strumarium at five consecutive time intervals including three, 10, 20, and 30 days after burr emergence and full maturation. The amount of approximately 3.5% differentially abundant proteins (DAPs) with a ~94% stage-specificity supports considerable proteome overlap in the two seed types. More than 38% of all differentially abundant proteins were observed at the first stage, supporting the importance of this stage of seed development for seed fate determination. Rapid overrepresentation of proteins responsible for cell wall biosynthesis, cytokinesis, and seed development were detected for non-dormant seed at the first stage, while dormancy-associated proteins showed less abundance. In the middle of seed development, we identified DAPs involved in seed maturation and ABA signaling. Interestingly, higher abundant proteins in the mature non-dormant seed were mainly involved in the facilitation of seed germination. Taken together, the temporal pattern of the accumulated proteins demonstrated a delay in the initiation of active cell division, enriched response to ABA, and defect in the seed maturation in developing dormant seeds. Moreover, stored proteins in the mature dormant seed are responsible for delaying germination but not dormancy induction. Finally, assume that dormancy may be established at a stage of seed development earlier than previously thought.
2024-08-22 | PXD052504 | Pride
Project description:Whether and how organisms can inherit environmental information from their parents is a major question in evolutionary theory. Plants have evolved to link reproductive development to seasonal environmental cues and seed dormancy is highly contingent on the environmental temperature during seed set, although the mechanism by which seeds acquire seasonal timing information is unclear. Here we show that loss of maternal like heterochromatin protein 1 (LHP1) causes an inability of progeny seeds to sense temperature and that this is linked mechanistically to reduced ABA levels in seeds and hyperaccumulation of free nitrate. Remarkably, single cell transcriptomics reveals that in both maternal fruit and seed tissues, the effect of small changes in temperature closely phenocopies the lhp1 mutant phenotype and ABA biosensor imaging reveal large fluxes of maternal ABA into seeds is modulated by temperature cues. We show that temperature activates ABA production in leaves and that maternal ABA is necessary and sufficient for progeny seeds to acquire seed dormancy. Thus, we reveal that the climate experience of mother plants causes adaptation of progeny behaviour via hormone transport during seed set.
2024-11-07 | GSE280705 | GEO
Project description:Whether and how organisms can inherit environmental information from their parents is a major question in evolutionary theory. Plants have evolved to link reproductive development to seasonal environmental cues and seed dormancy is highly contingent on the environmental temperature during seed set, although the mechanism by which seeds acquire seasonal timing information is unclear. Here we show that loss of maternal like heterochromatin protein 1 (LHP1) causes an inability of progeny seeds to sense temperature and that this is linked mechanistically to reduced ABA levels in seeds and hyperaccumulation of free nitrate. Remarkably, single cell transcriptomics reveals that in both maternal fruit and seed tissues, the effect of small changes in temperature closely phenocopies the lhp1 mutant phenotype and ABA biosensor imaging reveal large fluxes of maternal ABA into seeds is modulated by temperature cues. We show that temperature activates ABA production in leaves and that maternal ABA is necessary and sufficient for progeny seeds to acquire seed dormancy. Thus, we reveal that the climate experience of mother plants causes adaptation of progeny behaviour via hormone transport during seed set.
2024-10-11 | GSE278833 | GEO