| characterization of three loci controlling resistance of arabidopsis thaliana accession ms-0 to two powdery mildew diseases. | arabidopsis thaliana accession la-er was susceptible, and accession ms-0 was resistant, to powdery mildew diseases caused by erysiphe cruciferarum uea1 and e. cichoracearum ucsc1. the resistance reaction phenotype of a. thaliana ms-0 to both pathogens was characterized, and the resistance loci were genetically mapped. growth of e. cruciferarum uea1 on ms-0 leaves was arrested after formation of the first appressorium: the underlying host epidermal cell collapsed, and occasionally there was necro ... | 1997 | 9375391 |
| comparison of erysiphe cichoracearum and e. cruciferarum and a survey of 360 arabidopsis thaliana accessions for resistance to these two powdery mildew pathogens. | in previous work, uea1 and ucsc1, two geographically distinct, powdery mildew isolates, were recognized for their ability to infect arabidopsis thaliana. we have clarified the identity of these isolates by determining their host ranges, reexamining their morphology, and comparing their dna sequences for the 5.8s ribosomal rna and two flanking internal transcribed spacer sequences. these experiments confirm that uea1 is a member of erysiphe cruciferarum and that ucsc1 belongs to e. cichoracearum. ... | 1999 | 10624012 |
| constitutively elevated salicylic acid signals glutathione-mediated nickel tolerance in thlaspi nickel hyperaccumulators. | progress is being made in understanding the biochemical and molecular basis of nickel (ni)/zinc (zn) hyperaccumulation in thlaspi; however, the molecular signaling pathways that control these mechanisms are not understood. we observed that elevated concentrations of salicylic acid (sa), a molecule known to be involved in signaling induced pathogen defense responses in plants, is a strong predictor of ni hyperaccumulation in the six diverse thlaspi species investigated, including the hyperaccumul ... | 2005 | 15734913 |
| nitrogen and fungicide applications against erysiphe cruciferarum affect quality components of oilseed rape. | oilseed rape (brassica napus l.) is one of the most important oilseed crops in temperate climates. erysiphe cruciferarum is an important disease of oilseed rape and causes crop loss in warmer areas of europe. the research investigated the effect of nitrogen fertilizer and fungicidal treatment against powdery mildew infection caused by e. cruciferarum of oilseed rape on seed components, including protein, oil, oleic acid, linolenic acid and undesirable substances such as sinapic acid esters (sae) ... | 2008 | 17934794 |
| effect of fungicides and of biocontrol agents against powdery mildew of turnip. | the activity of several fungicides and of two biocontrol agents, bacillus subtilis and ampelomyces quisqualis, alone and in combination, against erysiphe cruciferarum, causal agent of powdery mildew, was evaluated on turnip under controlled conditions. among the tested fungicides, quinoxyfen and azoxystrobin provided the best disease control, followed by penconazole, myclobutanil, dinocap and meptyldinocap. sulphur provided a only partial control. the two biocontrol agents used alone provided a ... | 2008 | 19226738 |
| infection by powdery mildew erysiphe cruciferarum (erysiphaceae) strongly affects growth and fitness of alliaria petiolata (brassicaceae). | garlic mustard (alliaria petiolata) is an invasive biennial that negatively impacts plant and animal communities throughout north america and lacks significant herbivory in its invasive range. throughout ohio, many garlic mustard populations support the powdery mildew fungus erysiphe cruciferarum, although disease incidence varies among populations and environments. effects of infection on plant growth, as well as both plant and fungal responses to drought and light conditions, were examined on ... | 2007 | 21636376 |
| ropgaps of arabidopsis limit susceptibility to powdery mildew. | the barley rop gtpase hvracb is a susceptibility factor of barley to powdery mildew caused by the biotrophic fungus blumeria graminis f.sp. hordei (bgh). in a recent publication, we reported about a microtubule-associated rop gtpase-activating protein 1 (hvmagap1) of barley. transient-induced gene silencing or overexpression of hvmagap1 resulted in enhanced or reduced susceptibility to bgh, respectively, indicating a possible hvracb-antagonistic function of hvmagap1 in interaction with bgh. hvma ... | 2011 | 22067988 |