Showing papers in "Physiological and Molecular Plant Pathology in 2001"

TL;DR: Higher plants have the ability to initiate various defence reactions such as the production of phytoalexins, antimicrobial proteins, reactive oxygen species, and reinforcement of cell walls when they are infected by pathogens such as fungi, bacteria and viruses but if these reactions occur too late or are suppressed, the infection process will proceed successfully.

TL;DR: This is the first report of plant resistance to the fungal pathogen S. sclerotiorum in transgenic plants expressing OxO, and transgenic soybean plants produced byAgrobacterium -mediated transformation with the wheat germin gene encoding an oligomeric protein, oxalate oxidase (OxO), which oxidizes oxalic acid to carbon dioxide and hydrogen peroxide.

TL;DR: The genes that code for some traits involved in pathogenicity or virulence have been cloned and characterized, and so the evolutionary relationships of a few of the genes for enzymes and toxins known to play roles in diseases were explored.

TL;DR: 84 isolates of M. phaseolina from different plant species in different geographical regions of Mexico were analysed by inoculation on a set of P. vulgaris cultivars differing in reaction to the fungus and by determination of their amplified fragment length polymorphism (AFLP) genotype.

TL;DR: It is suggested that BTH protects cowpea seedlings by potentiating an early defence response rather than by altering the constitutive resistance of tissues.

TL;DR: It is demonstrated that direct contact with the pathogen is not required for induction of defense response genes and that these genes are activated in both susceptible and resistant genotypes.

TL;DR: The systemic acquired resistance (SAR) is an example of a defense mechanism o€ering long-lasting disease resistance against a broad spectrum of pathogens, and is promising for sustainable rice production in the future.

TL;DR: The LPS were found to possess activity as elicitors of plant defense responses in tobacco where the induction of PR-proteins was investigated by selective low pH extraction and electrophoretic analyses and indicative of an enhanced defensive capacity due to pre-conditioning by the bio-active LPS.

TL;DR: ‘‘Why is the name of the pathogen I work on changing?

TL;DR: The enhanced partial resistance of cotton to Verticillium wilt observed here, whether due to cultivar or bion ® treatment, is not accompanied by a change in the timing or levels of expression of the genes investigated, so it is likely that some other factors are responsible for the degree of resistance observed.

TL;DR: The results suggest that the apple PR-10 genes, in particular those of the APa subclass, which are strongly inducible by ASM, could play a role in local and systemic defences.

TL;DR: A possible mechanism of host plant resistance to the fungal pathogen F. graminearum among the susceptible cereal species based on the expression of modified Rpl3 genes is indicated.

TL;DR: The uncoupling of glyceollin synthesis from the HR and phenolic and lignin deposition by ABA and norflurazon treatment showed that glyceolin is a major factor in restriction of the pathogen during these interactions.

TL;DR: The results indicate the potential of fatty acid peroxides and LOX-related metabolism to engage an apoptotic type of PCD in higher plant cells.

TL;DR: In cocoa, the caffeine pathway is inducible in young actively growing leaves by pathogen attack, wounding and SA, and may be part of the defense response of this species to herbivory and infection.

TL;DR: BTH application and the induction of WCI gene expression does not provide resistance to FHB, and data indicate that the pathway for induction of the defense response genes by F. graminearum infection is distinct from the BTH-induced pathway.

TL;DR: GFP was expressed from the Cht promoter in cotyledon lesions on Brassica napus and Brassica juncea, and the high level of fluorescence in stem lesions indicated that Cht is also transcribed during infection of the stem.

TL;DR: The results of these experiments are among the first to suggest that necrotrophic, phytopathogenic bacteria are activating an apoptosis equivalent of programmed plant cell death as part of pathogenesis, and suggest that bacteria derive a growth-sustaining benefit from activating programmed Plant cell death.

TL;DR: Observations provide the first convincing evidence that V. lecanii may colonize root cells and trigger plant defense reactions in addition to being an efficient mycoparasite.

TL;DR: The results indicate that in tobacco ethylene perception is involved in lesion expansion, as well as in the generation and/or release of the mobile signal that induces SAR in non-infected plant parts.

TL;DR: It appears that suppressive factors released during virulent inducer infection prevented the hypersensitive epidermal cell death that normally is induced by the race-specific avirulence elicitor, however, suppression of Mla1 race- specific resistance was confined to the epidermis.

TL;DR: In situ hybridization results revealed that CacyP1 mRNA was localized in the phloem cells of vascular tissues in pepper fruits infected by C. gloeosporioides, and treatment with salicyclic acid and methyl jasmonate strongly induced the CACYP1 transcripts in pepper leaves.

TL;DR: Only the full length ORF conferred avirulence and the gene was designated avrPphD, and inactivation of avrpphD by marker-exchange did not affect the ability of P. syringae pv.

TL;DR: The comparison of viral accumulation in protoplasts and plants suggested that resistance of the highly resistant cultivars Tog5681 and Gigante was not due to the inhibition of virus replication but rather to the failure of cell to cell movement.

TL;DR: The pathological mechanisms involved in this disease, and indeed in phytoplasma diseases in general, are unclear as discussed by the authors, but they have attempted to contribute to this understanding by physiological characterization of the host response to the disease.

TL;DR: The data support a role for both chemical signals (hexenols or their analogues) and topographical signals being involved in appressorium induction by wheat stem rust.

TL;DR: This work has expressed the S. lycopersiciβ2-tomatinase gene in a tomatine tolerant mutant of Nectria haematococca MPVI, a fungus that normally can infect ripe but not green tomato fruit, and expression enabled it to detoxify α-tomatine and resulted in its ability to parasitize green Tomato fruit.