Bnsdp1 impaired seedling growth, especially in yellowed seedlings
Ontology highlight
ABSTRACT:
ORGANISM(S): Brassica napus
PROVIDER: GSE252072 | GEO | 2023/12/30
REPOSITORIES: GEO
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Project description:imbibed Col-0 seeds were sown on ? X MS medium supplemented with 0.8% agar and 1% sucrose. The plates were first exposed to continuous light for 12 h to stimulate germination and then wrapped with two layers of aluminum foil and placed in the growth chamber for 5 d. Once the plant material was uniformly germinated, the experimental conditions were applied. 5-d-old, dark-grown seedlings were washed seven times with sterile water followed by a wash with ? X MS liquid medium without sucrose to remove residual exogenous sugar and the plant material was kept in ? X MS liquid without sucrose in the dark for all subsequent steps. Cultures were shaken at 140 rpm at 22 C for 24 h and then treated with ? X MS without glucose or ½ X MS supplemented with BR (100 nM), glucose (3%), or glucose (3%) + BR (100 nM) for 3 h. Seedlings were harvested after 3h and preceded for RNA isolation and microarray analysis.
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Project description:The aim of this proposal is to understand the impact of the pho3 mutation on the transcriptome.The mutant pho3 was isolated on the basis of a failure to induce acid phosphatase activity in roots in response to low Pi. The pho3 mutant had a P deficient phenotype in vitro and in the leaves of soil grown pho3 plants the total P content was again reduced. pho3 exhibited a number of characteristics normally associated with low-P stress, including severely reduced growth, increased anthocyanin content and starch accumulation. pho3 was shown to have an absolute requirement for exogenous sucrose as pho3 seedlings were arrested in early seedling development on sucrose-free medium and was unaffected by Pi-availability. pho3 was found to be insensitive to high concentrations of exogenous sucrose (10%) but was sensitive to glucose. pho3 also exhibited reduced sensitivity of seed germination to exogenous ABA (abi-phenotype), a response which has been linked to sucrose insensitivity in both sugar-sensing and ABA mutants. Two developmental stages have been selected on the basis of the physiological characterisation of pho3. Seedlings (1.02; 2 rosette leaves) grown in agar and compost-grown plants (3.90; rosette growth complete). Agar will be supplemented with 1% sucrose and 1/2 strength MS; plants will be grown under a 16 h light/8 h dark cycle. Comparisons will be made between pho3 and Wassilewskija (the genetic background of the mutant) at each stage. Experimenter name: Julie Lloyd Experimenter phone: 01206 873307 Experimenter institute: Department of Biological Sciences, University of Essex Experimenter address: Colchester!Series_summary = Experimenter zip/postal_code: CO4 3SQ Experimenter country: UK Keywords: genetic_modification_design
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Project description:The aim of this proposal is to understand the impact of the pho3 mutation on the transcriptome.The mutant pho3 was isolated on the basis of a failure to induce acid phosphatase activity in roots in response to low Pi. The pho3 mutant had a P deficient phenotype in vitro and in the leaves of soil grown pho3 plants the total P content was again reduced. pho3 exhibited a number of characteristics normally associated with low-P stress, including severely reduced growth, increased anthocyanin content and starch accumulation. pho3 was shown to have an absolute requirement for exogenous sucrose as pho3 seedlings were arrested in early seedling development on sucrose-free medium and was unaffected by Pi-availability. pho3 was found to be insensitive to high concentrations of exogenous sucrose (10%) but was sensitive to glucose. pho3 also exhibited reduced sensitivity of seed germination to exogenous ABA (abi-phenotype), a response which has been linked to sucrose insensitivity in both sugar-sensing and ABA mutants. Two developmental stages have been selected on the basis of the physiological characterisation of pho3. Seedlings (1.02; 2 rosette leaves) grown in agar and compost-grown plants (3.90; rosette growth complete). Agar will be supplemented with 1% sucrose and 1/2 strength MS; plants will be grown under a 16 h light/8 h dark cycle. Comparisons will be made between pho3 and Wassilewskija (the genetic background of the mutant) at each stage. Experimenter name: Julie Lloyd; Experimenter phone: 01206 873307; Experimenter institute: Department of Biological Sciences,; University of Essex; Experimenter address: Colchester!Series_summary = Experimenter zip/postal_code: CO4 3SQ; Experimenter country: UK Experiment Overall Design: 6 samples were used in this experiment
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Project description:Arabidopsis thaliana seeds after imbibition were inoculated in ½ MS medium supplemented with 0.8% agar and 1% sucrose. Once the plant material was uniformly germinated, the experimental conditions were applied. 5d old light-grown uniformly germinated seedlings were washed seven times with sterile water with last wash given by ½ MS liquid medium without sucrose to remove residual exogenous sugar and the plant material was kept in ½ MS liquid without sucrose in the dark for all subsequent steps. Cultures were shaken at 140 rpm at 22oC for 24 h and then 3 h treatment was given with liquid ½ MS without glucose and liquid ½ MS supplemented with BR (0.1 ?M EBR), glucose (3%), glucose (3%) + BR (0.1 ?M EBR). Seedlings were harvested after 3h and preceded for RNA isolation and Microarray analysis.
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