Showing papers in "Physiological and Molecular Plant Pathology in 2002"

TL;DR: Whereas enhanced DAO activity in stems, and earlier increases in lipid peroxidation and CAT and SOD activities in roots, can be associated with resistance to fusarium wilt in chickpea, the induction of the latter three parameters in roots and stems along with that of APX, GR and GPX activities are rather more associated with the establishment of the compatible interaction.

TL;DR: B. mycoides isolate Bac J, a non-pathogenic, phyllosphere-inhabiting bacterium, reduces Cercospora leaf spot ( CercOSpora beticola Sacc.) of sugar beet by 38–91% in both glasshouse and field experiments.

TL;DR: Geminiviruses are insect-transmitted ssDNA plant viruses that reproduce in intact host nuclei and viral and plant proteins involved in these processes are described and a model summarising the accumulated knowledge is presented.

TL;DR: Alterations in water relations, growth and histopathology caused by Macrophomina phaseolina, causal agent of charcoal rot, and drought stress were characterized in Phaseolus vulgaris L. under controlled conditions.

TL;DR: The results support the hypothesis that neem extract may act indirectly by inducing plant defence reactions and it may be useful in integrated management of leaf stripe disease of barley.

TL;DR: Begomovirus CP is an outstanding example of a multifunctional viral protein that binds to and protecting viral ssDNA, self-binding, nuclear targeting, nuclear export and, with monopartite-genome begomoviruses, mediating systemic movement in plants.

TL;DR: These results are the first to link CHS and CHI increased activities with induced resistance in cucumber and highlight the implication of flavonoids in the complex defence system of this plant species.

TL;DR: The data suggest that thaxtomin A alters, either directly or indirectly, the deposition or composition of monocot and dicot plant cell walls in ways that affect the wall integrity and the ability of the cell to progress normally through cytokinesis.

TL;DR: The elevation of hypericins and hyperforin in response to chemical and biotic elicitors suggests that these secondary metabolites are components in the inducible plant defense responses of H. perforatum.

TL;DR: The hypertrophy of the host cells in the infection area were also observed around 12 days after the inoculation corresponding macroscopically to the reaction flt .In susceptible plants, cell death was also observed 3 days afterwards but only in a reduced percentage of infection sites in which the fungus aborted at an early stage.

TL;DR: The results suggest the systemic potentiation of defence-related gene expression is a key component of SAR, which is characterised by an enhanced capacity to induce cellular defence responses to subsequent pathogen attack.

TL;DR: Investigation of the SAR signaling pathway in tobacco using probenazole and its active metabolite suggested that similar signaling pathways upstream of SA function in dicotyledonous plants species, suggesting that similar defenses against disease resistance and fungal pathogen resistance are similar in other plant species.

TL;DR: This review describes how diverse scientific approaches have elucidated the functions of the mastrevirus-encoded proteins and describes the viral protein–protein interactions necessary for completion of the virus infection cycle.

TL;DR: The results support previous suggestions for this host–pathogen system of a critical role for ROS in limiting colonization, and this appears to be partly as a signal molecule for plant defence responses.

TL;DR: It was concluded that C26 aldehyde, a component of barley wax, is the factor highly responsible for the APP differentiation of B. graminis.

TL;DR: The variant strategies used by different geminiviruses to impinge on the cell cycle and to assemble protein complexes at the site of the origin of DNA replication are discussed.

TL;DR: Experimental results suggested that ASM had an effect on the production and secretion of fungitoxic compounds to the leaf surface that hamper rust urediospore germination and appressorium formation, and this hypothesis is supported by the following experimental results.

TL;DR: The artificial exogenous electron donors, DPC and NH2OH significantly restored the PSII activity in both mild and severely infected leaves, and marked loss of PS II activity in infected leaves was evidently due to the loss of 33, 28–25, 23, 17 and 10 kDa polypeptides.

TL;DR: The results indicate that anthocyanin production by cotton leaves in response to an unsuccessful challenge by the bacterium is a bacterial blight resistance response, but is not essential for resistance.

TL;DR: This study provides further evidence that PAL has a role in plant defence and the expression of the ShPAL transgene and elevated PAL levels were correlated and stably inherited.

TL;DR: It is proposed that sorghum CHS8 has evolved new enzymatic functions that are involved in the synthesis of defence-related flavonoids, such as the 3-deoxyanthocyanidins, during fungal infection.

TL;DR: A cDNA subtraction library of C. zeae-maydis revealed 197 cDNAs with high similarity to genes in the GenBank and Saccharomyces Genome Database, and these genes were grouped into nine categories based on predicted functions of the encoded proteins.

TL;DR: Effects of inhibiting phenolic biosynthesis on penetration resistance of barley isolines containing seven powdery mildew resistance genes or alleles are studied.

TL;DR: Results suggest that phaseolotoxin production contributes to the formation of chlorotic halo lesions in kiwifruit canker but is not required for multiplication of the pathogenic bacterium during infection.

TL;DR: It is concluded that phytoplasmal infection inactivates the donor side of photosystem II, and the content of the 33 kDa protein of the water-splitting complex was diminished significantly in infected leaves.

TL;DR: OsPI-PLC1 may be involved in the signaling pathways leading to disease resistance in rice, and was activated within 6 h after inoculation with the blast fungus in BTH-treated rice seedlings and in the incompatible interaction between a resistant genotype of rice andM.

TL;DR: It is suggested that Agrobacterium induced a resistance-like response in wheat that may reduce the efficacy of transformation and limit the normal symptom formation.

TL;DR: Findings reported in the present study indicate that β-1,3-glucanase and chitinase accumulation in the F. culmorum -infected wheat spike may be involved in resistance to pathogen spread in the host tissue.

TL;DR: Transmission electron microscopy studies proved that P. quercina penetrated the cell walls forming haustorial-like structures in invaded cells and ELISA demonstrated with ELISA that quercinin was produced by the pathogen in infected tissue during the whole growth phase.

TL;DR: Most pathogenic species of Penicillium have a limited host range, suggesting unique adaptations to particular hosts, but P. italicum is stimulated by components present in citrus peel, indicating a synergistic effect.