GEO DataSets

Examination of disease resistance mechanisms in powdery mildew resistant 4 (pmr4), a mutant lacking pathogen-induced callose. Infected and uninfected pmr4-1 and wildtype plants examined. Activation of salicylic acid signal transduction pathway implied.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 2 infection, 2 strain sets

Platform:

GPL198

Series:

GSE431

16 Samples

Download data: CEL, CHP, EXP, RPT

(Submitter supplied) There were two genotypes: (1) Columbia-0, wild-type (C) (2) pmr4-1 mutant (P), callose synthase deficient mutant (Vogel and Somerville (2000) Proc. Natl. Acad. Sci., USA 97: 1897). There were two treatments: (1) uninoculated (U) (2) 3 days after inoculation with the powdery mildew pathogen, Erysiphe cichoracearum, race UCSC (I). There were four biological replicates, labeled 1, 2, 3 or 4. Examples of the sample labels are: CU1 = Columbia-0, uninoculated, replicate 1 CI2 = Columbia-0, 3 days after inoculation with powdery mildew, replicate 2 PU3 = pmr4-1, uninoculated, replicate 3 PI4 = pmr4-1, 3 days after inoculation with powdery mildew, replicate 4. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS417

Platform:

GPL198

16 Samples

Download data: CEL, CHP, EXP, RPT

(Submitter supplied) Plant defenses against pathogens and insects are regulated differentially by cross-communicating signaling pathways in which salicylic acid (SA), jasmonic acid (JA) and ethylene (ET) play key roles. To understand how plants integrate pathogen- and insect-induced signals into specific defense responses, we monitored the dynamics of SA, JA, and ET signaling in Arabidopsis after attack by a set of microbial pathogens and herbivorous insects with different modes of attack. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

14 Samples

Download data: CEL

(Submitter supplied) The Arabidopsis Pathoarray 464_001 (GPL3638) was used to compare response of Col-0, pad4-1 (Zhou et al., 1998; Jirage et al., 1999) and sid2-2 (Wildermuth et al., 2001) to Pseudomonas syringae pv. tomato DC3000 hrcC mutant. SA production is drastically reduced in sid2 mutants. PAD4 is required for SA-mediated responses. The results suggested that the SA increase triggered by MAMPs is one major component in the MAMPs-triggered signaling mechanism. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL3638

24 Samples

Download data: GPR

(Submitter supplied) We used Arabidopsis full-genome microarrays to characterize plant transcript accumulations in map65-3 and ugt76b1 mutants, 3 days after water treatment and inoculation with the biotrophic oomycete downy mildew pathogen, Hyaloperonospora arabidopsidis (Hpa)

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

12 Samples

Download data: CEL

(Submitter supplied) Arabidopsis is a host to the fungal powdery mildew pathogen, Erysiphe cichoracearum, and a nonhost to Blumeria graminis f.sp. hordei, the powdery mildew pathogenic on barley. A screen for mutants that allowed increased entry by this inappropriate or nonhost pathogen on Arabidopsis led to the identification of PEN3. While pen3 mutants permitted both increased penetration and increased hyphal growth by B. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS1785

Platform:

GPL198

24 Samples

Download data

Analysis of pen3 mutants after inoculation with barley powdery mildew, Blumeria graminis f. sp hordei (B. g. hordei). pen3 mutations allows increased epidermal cell invasion by B. g. hordei. Results provide insight into the mechanisms underlying the lack of nonhost resistance in pen3 mutants.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 2 genotype/variation, 3 infection sets

Platform:

GPL198

Series:

GSE3220

24 Samples

Download data

(Submitter supplied) Using the ATH1 Affymetrix microarrays consisting of about 23,000 genes, we examined the response of Arabidopsis seedlings to chito-tetramers, chito-octamers and hydrolyzed chitin after 30 min of treatment. Keywords = chitin Keywords = defense Keywords = elicitor Keywords = mutant Keywords = powdery mildew Keywords = Erysiphe cichoracearum Keywords: ordered

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Dataset:

GDS1531

Platform:

GPL198

9 Samples

Download data: CEL, EXP

Analysis of 14-day-old Columbia-0 seedlings treated with hydrolyzed crab-shell chitin or chito-octamer. Chitin is a major component of fungal walls and insect exoskeletons. Results provide insight into the signaling pathways involved in activating defense genes in response to chito-oligomers.

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array, count, 3 agent sets

Platform:

GPL198

Series:

GSE2538

9 Samples

Download data: CEL, EXP

(Submitter supplied) Tocopherols (vitamin E) are lipid-soluble antioxidants produced by all plants and algae, and many cyanobacteria, yet their functions in these photosynthetic organisms are still not fully understood. We have previously reported that the vitamin E deficient 2 (vte2) mutant of Arabidopsis thaliana is sensitive to low temperature (LT) due to impaired transfer cell wall (TCW) development and photoassimilate export, associated with massive callose deposition in transfer cells of the phloem. more...

Organism:

Arabidopsis thaliana

Type:

Expression profiling by array

Platform:

GPL198

18 Samples

Download data: CEL