Transcriptional changes during photoperiodic tuber induction in Solanum tuberosum ssp andigena
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ABSTRACT:
ORGANISM(S): Solanum tuberosum Solanum tuberosum subsp. andigenum
PROVIDER: GSE31336 | GEO | 2011/10/06
SECONDARY ACCESSION(S): PRJNA145993
REPOSITORIES: GEO
Similar Datasets
Project description:For expression profiling analyses of early stages of tuber induction, plants of Solanum tuberosum ssp andigena (7540) were used. This wild subspecies is strictly dependent on photoperiod for tuberisation, such that short days (SD) inductive conditions are required in order to trigger tuber induction in the stolons. Andigena plants were grown in the greenhouse under LD non-inductive conditions until a 10-leaf stage. They were subsequently transferred to inductive SD conditions (8 h light/16 h dark), and sampled at 0, 2, 4, 6 and 8 days after transfer to SDs. Tuber swelling was visible approximately 6-8 days after transfer to inductive conditions. The apical region of the stolons (2 cm) was collected one hour before the beginning of the light period. All collected stolons (LD; and 2d, 4d, 6d and 8d under SD) were processed as described. Hybridization scheme with a loop design was applied to compare one sample against the rest of the samples in the induction time course.
2011-10-05 | E-GEOD-31336 | biostudies-arrayexpress
Project description:Summary StSP6A is a protein with sequence homology to the Arabidopsis FLOWERING LOCUS T (FT). FT is a main component of the long range flowering promoting signal or florigen that induces photoperiodic flowering under long days (LDs). In potato, short days (SDs) promote tuber induction, and wild subspecies like Solanum tuberosum ssp andigena (wild type line 7540) are strictly dependent on SDs to tuberize. StSP6A transcription is induced in leaves and stolons at early stages upon transfer to SD inductive conditions, priotr to visible solon swelling. Transgenic andigena lines over-expressing the StSP6A gene under the control of the 35S promoter are able to tuberize under LD non-inductive conditions, whereas silencing of this gene by means of an specific RNAi construct are strongly delayed in tuber induction in SD inductive conditions. This data indicate that StSP6A plays a central role in the control of tuber induction.
2011-10-06 | GSE31178 | GEO
Project description:Summary StSP6A is a protein with sequence homology to the Arabidopsis FLOWERING LOCUS T (FT). FT is a main component of the long range flowering promoting signal or florigen that induces photoperiodic flowering under long days (LDs). In potato, short days (SDs) promote tuber induction, and wild subspecies like Solanum tuberosum ssp andigena (wild type line 7540) are strictly dependent on SDs to tuberize. StSP6A transcription is induced in leaves and stolons at early stages upon transfer to SD inductive conditions, priotr to visible solon swelling. Transgenic andigena lines over-expressing the StSP6A gene under the control of the 35S promoter are able to tuberize under LD non-inductive conditions, whereas silencing of this gene by means of an specific RNAi construct are strongly delayed in tuber induction in SD inductive conditions. This data indicate that StSP6A plays a central role in the control of tuber induction. For each sample of the two comparisons (35S-StSP6A versus Wild Type and StSP6A-RNAi versus Wild Type) two biological replicates were prepared. In the case of 35S-StSP6A and StSP6A-RNAi each replicate was composed by a pool of several transgenic lines.
2011-10-05 | E-GEOD-31178 | biostudies-arrayexpress
Project description:Plants of Solanum tuberosum ssp andigena, which tuberize only under SD conditions, were grown in growth chambers under non-inductive LD conditions and half of the plants were transferred to inductive SD conditions for 1 or 15 days, whilst the rest of the plants were kept as controls in LD. Transgenic potato plants with reduced phyB levels, which tuberize irrespective of photoperiod, were also grown in LD conditions. All the plants, irrespective of treatment, were harvested 14 hours after the beggining of the photoperiod (i.e. immediately before dusk for plants on LD, and 8 hours after dusk for the plants on SD). A similar experimental protocol was used with plants of N. tabacum cv Hicks that flower at the same time irrespective of photoperiod and the isogenic line N. tabacum cv Hicks carrying the Maryland Mammoth mutant allele, which flower only on SD (i.e. the plants were grown under LD for 55 or 41 days in LD and then transferred for 1 or 15 days to SD conditions, respectively, whilst control plants were grown 56 days in LD). Finally, Nicotiana silvestris plants that flower only on LD were grown in non-inductive SD and then half of the plants were transferred to inductive LD conditions for 1 or 15 days. In all cases we harvested only the leaves, the organ in which daylength perception takes place and photoperiodic responses are initiated. SD conditions in this experiments were 8 hours of light/ 16 hours of darkness, 160 uEinstein, 22 °C. LD conditions were 16 hours of light/ 8 hours of darkness, 80 uEinstein, 22 °C. RNA was extracted with TRIZOL. Keywords: Direct comparison / Balanced Block Design
2007-09-01 | GSE8142 | GEO
Project description:The consequences on tuber transcriptome of a short heat period during tuber development was investigated in this study with special regard to the development of secondary tuber growth. Plants were grown for 47 days in the greenhouse under ambient conditions (21°C/ 19°C, 16h light, 8h dark) before application of mild heat stress temperatures (29°C/27°C) to one group of plants for 7 days and a stress release period on control temperature for 2 more weeks until harvest. Leaves were sampled before the heat period, at the end of the heat period and at harvest, two weeks after stress release. Tuber samples were taken at harvest. Tubers grown at normal temperatures and exhibiting a normal growth phenotype were used as control. Tubers subjected to the heat treatment and exhibiting a second-growth phenotype (chain tubers) were grouped into primary (attached to stolon from plant) and secondary tubers (attached to stolon from primary tuber).
2016-12-12 | E-MTAB-4805 | biostudies-arrayexpress
Project description:Transcriptional changes during photoperiodic tuber induction in Solanum tuberosum ssp andigena
| PRJNA145993 | ENA
Project description:ngs2015_01_transition-transition-Identification of transcripts and long non-coding transcripts in wild-type mature rosette leaves of Arabidopsis thaliana during a photoperiodic switch inducing floral transition.-Arabidopsis thaliana Col-0 plants were grown in soil, in growth chamber under white fluorescent light, under short-day (8 hours light/16 hours dark, SD) or long-day (16 hours light/8 hours dark, LD) conditions. Temperature in SD was 21°C during the light period and 18°C during the dark, humidity (65%) remained constant. In LD, temperature (21°C) and humidity (70%) remained constant. Plants were cultured for 4 weeks in individual pot, in SD then transferred in LD. Plants were analysed at different time points before transfer (T0) and after two, three and five days of transfer (T2, T3, T5). The second pair of leaves was collected before dusk, at Zeitgeber time 15 (ZT15) considering ZT 0 the switched on of the light. Three biological replicates were performed. The floral transition occurs between T0 and T5 based on AP1:GUS marker, a inflorescence meristem is not yet visible during this developmental window at the center of the rosette.
2019-04-17 | GSE116123 | GEO
Project description:Recent advances have defined some of the components of photoperiodic signalling that lead to tuberisation in potato including orthologues of FLOWERING LOCUS T (StSP6A) and CYCLING DOF FACTOR (StCDF1). The aim of the current study is to investigate the molecular basis of permissive tuber initiation under long days in Solanum tuberosum Neo-Tuberosum by comparative analysis with an obligate short day Solanum tuberosum ssp. Andigena accession. We show that the Neo-Tuberosum accession, but not the Andigena, contains alleles that encode StCDF1 proteins modified in the C-terminal region, likely to evade long day inhibition of StSP6A expression. We also identify an allele of StSP6A from the Neo-Tuberosum accession, absent in the Andigena, which is expressed under long days. Other leaf transcripts and metabolites that show different abundances in tuberising and non-tuberising samples were identified adding detail to tuberisation-associated processes. Overall, the data presented in this study highlight the subtle interplay between components of the clock-CONSTANS-StSP6A axis which collectively may interact to fine-tune the timing of tuberisation.
2013-11-01 | E-MTAB-1799 | biostudies-arrayexpress
Project description:Effect of TIF on gene expression under inductive and non-inductive photoperiods
| PRJNA101237 | ENA
Project description:Growth daylength, ambient CO2 level, and intracellular hydrogen peroxide (H2O2) availability all impact plant function by modulating signalling pathways, but interactions between them remain unclear. Using a whole-genome transcriptomics approach, we exploited the conditional photorespiratory nature of the catalase-deficient cat2 mutant to identify gene expression patterns responding to these three factors. Arabidopsis Col-0 and cat2 grown for 5 weeks in high CO2 in short days (SD) were transferred to air in SD or long days (LD), and microarray analysis was performed. Of more than 500 genes differentially expressed in Col-0 between high CO2 and transfer to air in SD, the response of about one-third was attenuated by transfer to air in LD. H2O2-responsive genes in cat2 were highly dependent on daylength. The majority of H2O2-induced genes were more strongly up-regulated after transfer to air in SD than to LD, while a smaller number showed an opposing pattern. Responses of other H2O2-dependent genes indicate redox-modulation of the daylength control of fundamental cell processes. The overall analysis provides evidence that (1) CO2 level modulates stress-associated gene expression; (2) both CO2 and H2O2 interact with daylength and photoreceptor signalling pathways; and (3) cellular signalling pathways may be primed to respond to increased H2O2 in a daylength-determined manner. Two genotypes x five conditions experiment, including Arabidopsis Col0WT and cat2-1 plants grown in soil for 5 weeks in a 8h light/16h dark (short day) regime at high CO2 concentration (3000 ppm CO2) and subsequently transferred to air (400 ppm CO2) in a short day or long day (16h light/8h dark) regime for 2 and 4 days. Three biological replicates were used that consist each of a pool of two leaves from different plants. Each sample was hybridized to one Genechip® Arabidopsis ATH1 Genome Array (Affymetrix).
2012-03-07 | E-GEOD-27985 | biostudies-arrayexpress