Host Plant Responses to Virus Infection

1980 ◽  
pp. 297-359 ◽  
Author(s):  
R. E. F. Matthews
Keyword(s):  
Virus Infection ◽  
Host Plant ◽  
Plant Responses

Host plant response of Eumusa and Australimusa bananas (Musa spp.) to migratory endoparasitic and root-knot nematodes

Nematology ◽  
2000 ◽  
Vol 2 (8) ◽  
pp. 907-916 ◽  
Author(s):  
Ngo Thi Xuyen ◽  
Raf Verlinden ◽  
Ruth Stoffelen ◽  
Dirk De Waele ◽  
Rony Swennen
Keyword(s):  
Host Plant ◽  
Papua New Guinea ◽  
Loamy Sand ◽  
Plant Responses ◽  
Radopholus Similis ◽  
Root Knot Nematodes ◽  
Musa Spp ◽  
Pratylenchus Coffeae ◽  
Meloidogyne Spp

AbstractTwenty-five banana varieties of section Eumusa (AA-group) and seven of the section Australimusa (Fe'i-group) from Papua New Guinea were evaluated for resistance to Radopholus similis, Pratylenchus coffeae and Meloidogyne spp. The host plant responses were compared with the susceptible reference cvs Grande Naine and Cavendish 901. In vitro propagated plants were transferred to the glasshouse in loamy sand and inoculated with approximately 1000 migratory endoparasitic nematodes at 4 weeks after planting. Reproduction of R. similis and P.coffeae in the roots was determined at 8 or 10 weeks, respectively, after inoculation. Reproduction of Meloidogyne spp. was determined 8 weeks after inoculation with 3300 to 5000 eggs. No resistance to R. similis was found in the diploid varieties. The Fe'i variety Rimina and possibly Menei were resistant to R. similis. All varieties tested were susceptible to P.coffeae and Meloidogyne spp. Tests de résistance de bananiers Eumusa et Australimusa (Musa spp.) envers les nématodes endoparasites migrateurs et galligènes - Vingt-cinq variétés de bananier de la section Eumusa (groupe AA) et sept de la section Australimusa (group Fe'i) provenant de Papouasie-Nouvelle Guinée ont été testées pour leur résistance envers Radopholus similis, Pratylenchus coffeae et Meloidogyne spp. Les résponses de ces variétés ont été comparées à celles des cultivars sensibles de référence Grande Naine et Cavendish 901. Des vitroplants ont été mis en place en serre sur un sol argilo-sableux et inoculés 4 semaines après plantation avec environ 1000 R. similis ou P.coffeae dont la reproduction a été déterminée 8 et 10 semaines, respectivement, après inoculation. La reproduction de Meloidogyne spp. l'a été 8 semaines après inoculation avec 3300 à 5000 oeufs. Aucune résistance à R. similis n'a été observée chez les variétés diploïdes. Les variétés du groupe Fe'i Rimina et Menei se sont montrées résistantes à R. similis, avec un certain doute dans le cas de la dernière. Toutes les variétés testées sont sensibles à P.coffeae et Meloidogyne spp.

Phytophagous insect fauna tracks host plant responses to exotic grass invasion

Oecologia ◽  
2010 ◽  
Vol 165 (4) ◽  
pp. 1051-1062 ◽  
Author(s):  
Mário Almeida-Neto ◽  
Paulo I. Prado ◽  
Thomas M. Lewinsohn
Keyword(s):  
Host Plant ◽  
Plant Responses ◽  
Phytophagous Insect ◽  
Insect Fauna ◽  
Exotic Grass ◽  
Grass Invasion

scholarly journals Pseudomonas fluorescens Induces Strain-Dependent and Strain-Independent Host Plant Responses in Defense Networks, Primary Metabolism, Photosynthesis, and Fitness

2012 ◽  
Vol 25 (6) ◽  
pp. 765-778 ◽  
Author(s):  
David J. Weston ◽  
Dale A. Pelletier ◽  
Jennifer L. Morrell-Falvey ◽  
Timothy J. Tschaplinski ◽  
Sara S. Jawdy ◽  
...  
Keyword(s):  
Pseudomonas Fluorescens ◽  
Host Plant ◽  
Network Architecture ◽  
Plant Performance ◽  
Molecular Networks ◽  
Physiological Data ◽  
Carbon Gain ◽  
Plant Responses ◽  
Primary Metabolism ◽  
Pathway Regulation

Colonization of plants by nonpathogenic Pseudomonas fluorescens strains can confer enhanced defense capacity against a broad spectrum of pathogens. Few studies, however, have linked defense pathway regulation to primary metabolism and physiology. In this study, physiological data, metabolites, and transcript profiles are integrated to elucidate how molecular networks initiated at the root–microbe interface influence shoot metabolism and whole-plant performance. Experiments with Arabidopsis thaliana were performed using the newly identified P. fluorescens GM30 or P. fluorescens Pf-5 strains. Co-expression networks indicated that Pf-5 and GM30 induced a subnetwork specific to roots enriched for genes participating in RNA regulation, protein degradation, and hormonal metabolism. In contrast, only GM30 induced a subnetwork enriched for calcium signaling, sugar and nutrient signaling, and auxin metabolism, suggesting strain dependence in network architecture. In addition, one subnetwork present in shoots was enriched for genes in secondary metabolism, photosynthetic light reactions, and hormone metabolism. Metabolite analysis indicated that this network initiated changes in carbohydrate and amino acid metabolism. Consistent with this, we observed strain-specific responses in tryptophan and phenylalanine abundance. Both strains reduced host plant carbon gain and fitness, yet provided a clear fitness benefit when plants were challenged with the pathogen P. syringae DC3000.

Features of crossing-over in virus-infected tomato

2006 ◽  
Vol 1 (3) ◽  
pp. 386-398 ◽  
Author(s):  
Gheorghe Chiriac ◽  
Larisa Andronic ◽  
Valeriu Bujoreanu ◽  
Liliana Marii
Keyword(s):  
Virus Infection ◽  
Viral Infection ◽  
Tobacco Mosaic Virus ◽  
Host Plant ◽  
Mosaic Virus ◽  
Potato Virus X ◽  
Crossing Over ◽  
Plant Genotype ◽  
Tomato Aspermy Virus ◽  
Infected Tomato

AbstractThe evidence of increased crossing over rate in tomato hybrids infected with TAV (Tomato aspermy virus), PVX (Potato virus X), TMV (Tobacco mosaic virus), TMV+PVX indicates the recombinogenic effect of viral infection. Cytological studies of the early diakinesis in healthy and virus-infected tomato revealed significant changes in chiasma number and position. The most significant changes were established for bivalents with two interstitial chiasmata and with one terminal and one interstitial. The data obtained indicate redistribution of the chiasmata position and induction of additional exchanges. The virus-induced recombination is segment-specific and depends on the host plant genotype, virus infection and the interaction between them.

scholarly journals Virus infection influences host plant interactions with non‐vector herbivores and predators

2014 ◽  
Vol 29 (5) ◽  
pp. 662-673 ◽  
Author(s):  
Kerry E. Mauck ◽  
Erica Smyers ◽  
Consuelo M. De Moraes ◽  
Mark C. Mescher
Keyword(s):  
Virus Infection ◽  
Host Plant ◽  
Plant Interactions
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