Project description:X-ray CT was used to determine the growth velocity of individual tubers. RNA was extracted from tubers growing at different velocities and used for microarray hybridisation.
Project description:Transcript profiling of wild type (cv. Solara) vs. At CKX 1 expressing potato tubers in an in vitro sprouting assay using gibberellic acid.
Project description:AtHsp70-14 and -15 are two closely related isoforms of the Hsp110/SSE subfamily of the HSP70 chaperones in Arabidopsis thaliana. By analysing T-DNA insertion and amiRNA-AtHsp70-14/15 lines, we could demonstrate an essential function of AtHsp70-15 for plant growth. AtHsp70-15 silenced plants are reduced in size and stomata opening is impaired which results in accelerated wilting of detached leaves. AtHsp70-15 silenced plants are also more tolerant to TuMV infection but more sensitive to heat treatment. Therefore comparative transcriptome analysis of amiRNA-AtHsp70-14/15 and control plants, PME1, was performed with leaf samples of 8 week old plants grown under ambient conditions. The analysis of differentially regulated genes compared to control plants exhibited a constitutive heat stress response / cytosolic protein response.
Project description:This is a study to characterize gene expression profiles in stored Russet Burbank potato tubers. Tubers were harvested from commercial fields in the central sands region of Wisconsin in the fall of 2006. The tubers were put into storage at 55 degrees F for preconditioning and wound healing. Shortly after the temperature of the storage bin began to decrease, uniform, healthy tubers were selected for use in this microarray analysis. Tubers were at 53.6 degrees F at this time, and pieces of starch-storing tissue were collected for use as the reference sample. Other tubers were moved to temperature-controlled lockers and these were cooled gradually to either 48 or 40 degrees F following industry standard procedures. The expectation was that tubers held at 48 degrees would not have a significant accumulation of glucose and fructose, but that tubers cooled to 40 degrees would undergo low temperature sweetening and accumulate glucose and fructose to a degree that is unsuitable for processing. Three weeks later, when the locker temperatures were 48 degrees F and 41.5 degrees F, tissue samples were collected for RNA analysis. After another three weeks, samples were collected from tubers at 48 degrees F and 40 degrees F. At that time some tubers were moved from the 48 degree locker to the 40 degree locker in order to see if gene expression changes observed as a result of gradual cooling are similar to those that occur following a sudden decrease in temperature. Three weeks later, samples were collected from tubers held at 48 degrees F, tubers held at 40 degrees F, and from the tubers that were moved from 48 to 40 degrees F. At this time another set of tubers was transferred from 48 degrees to 40 degrees. Three weeks later the last samples were harvested from tubers held at 48 degrees F, from tubers held at 48 degrees F and from tubers that were transferred three weeks prior from 48 to 40 degrees. RNA was isolated from tissue extracted from three tubers. Keywords: Reference design
Project description:The experiment followed transcriptional changes during potato tuber induction from a stolon tip to a tuber. Samples were taken at stage 1, stage 3, stage 4 and stage 5 according to Kloosterman et al., 2005
Project description:Samples from dormant and sprouting bud tissue from potato tubers were taken to enable global transcriptome analysis of active meristematic tissue. Data was used in a co-expression analysis using microarray data of different experimental backgrounds.