Effects of Host Plant Patch Size on Herbivore Density: Underlying Mechanisms

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 1103-1117 ◽  
Author(s):  
Catherine E. Bach
Keyword(s):  
Host Plant ◽  
Patch Size ◽  
Herbivore Density ◽  
Underlying Mechanisms

Effects of Host Plant Patch Size on Herbivore Density: Patterns

Ecology ◽  
1988 ◽  
Vol 69 (4) ◽  
pp. 1090-1102 ◽  
Author(s):  
Catherine E. Bach
Keyword(s):  
Host Plant ◽  
Patch Size ◽  
Herbivore Density

scholarly journals Impact of Host Plant Connectivity, Crop Border and Patch Size on Adult Colorado Potato Beetle Retention

PLoS ONE ◽  
2014 ◽  
Vol 9 (5) ◽  
pp. e95717 ◽  
Author(s):  
Gilles Boiteau ◽  
Charles Vincent ◽  
Tracy C. Leskey ◽  
Bruce G. Colpitts ◽  
Pamela MacKinley ◽  
...  
Keyword(s):  
Host Plant ◽  
Colorado Potato Beetle ◽  
Patch Size ◽  
Potato Beetle

scholarly journals Effect of patch size of the exotic host plant Calotropis procera (Apocynaceae) on herbivory

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Geraldo Wilson Fernandes ◽  
Maria Fernanda Vicente Rodrigues-Menelau ◽  
Jarcilene Silva de Almeida ◽  
Samuel Novais
Keyword(s):  
Host Plant ◽  
Patch Size ◽  
Calotropis Procera ◽  
Exotic Host

scholarly journals The tritrophic system hyptis suaveolens (Lamiaceae) - agromyzid leafminers (Diptera: Agromyzidae) - parasitoids (Hymenoptera): effects of herbivore density, host plant patch size, and habitat complexity on parasitism rate

2009 ◽  
Vol 52 (3) ◽  
pp. 573-580 ◽  
Author(s):  
Jarbas Marcal de Queiroz ◽  
Maria Alice Garcia
Keyword(s):  
Host Plant ◽  
Habitat Complexity ◽  
Patch Size ◽  
Host Density ◽  
Habitat Diversity ◽  
Parasitism Rate ◽  
Tritrophic System ◽  
Hyptis Suaveolens ◽  
Plant Densities ◽  
Managed Ecosystems

In this study a tritrophic system was evaluated to measure the contributions of the insect host density and its host plant concentration in simple and diversified habitat on the rate of parasitism. The system was composed of the plant Hyptis suaveolens, two species of agromyzid leafminers, and three morphospecies of parasitoids. The parasitism rate, patch size, and habitat complexity were found to be interdependent. If only the habitat complexity or patch size was take into account the differences in parasitism rate are not significant, although habitat diversity seemed to contribute more than the host plant concentration to increase the parasitism rate. The leaves or plants with different number of mines were equally attacked by the parasitoids. The results were representative of what happened to the leafminers at different host plant densities under the homogeneous and heterogeneous habitat condition. This work could help to reinforce the idea of the importance of the plant diversity for enhancing the biological control of the pests by the parasitoids in the managed ecosystems.

scholarly journals Nitrogen Supply and Host-Plant Genotype Modulate the Transcriptomic Profile of Plasmodiophora brassicae

2021 ◽  
Vol 12 ◽  
Author(s):  
Kévin Gazengel ◽  
Yoann Aigu ◽  
Christine Lariagon ◽  
Mathilde Humeau ◽  
Antoine Gravot ◽  
...  
Keyword(s):  
Host Plant ◽  
Time Course ◽  
Plasmodiophora Brassicae ◽  
Abiotic Factors ◽  
Secondary Phase ◽  
Nitrogen Supply ◽  
Plant Genotype ◽  
Molecular Physiology ◽  
Underlying Mechanisms ◽  
Low Nitrogen

Nitrogen fertilization can affect the susceptibility of Brassica napus to the telluric pathogen Plasmodiophora brassicae. Our previous works highlighted that the influence of nitrogen can strongly vary regarding plant cultivar/pathogen strain combinations, but the underlying mechanisms are unknown. The present work aims to explore how nitrogen supply can affect the molecular physiology of P. brassicae through its life epidemiological cycle. A time-course transcriptome experiment was conducted to study the interaction, under two conditions of nitrogen supply, between isolate eH and two B. napus genotypes (Yudal and HD-018), harboring (or not harboring) low nitrogen-conditional resistance toward this isolate (respectively). P. brassicae transcriptional patterns were modulated by nitrogen supply, these modulations being dependent on both host-plant genotype and kinetic time. Functional analysis allowed the identification of P. brassicae genes expressed during the secondary phase of infection, which may play a role in the reduction of Yudal disease symptoms in low-nitrogen conditions. Candidate genes included pathogenicity-related genes (“NUDIX,” “carboxypeptidase,” and “NEP-proteins”) and genes associated to obligate biotrophic functions of P. brassicae. This work illustrates the importance of considering pathogen’s physiological responses to get a better understanding of the influence of abiotic factors on clubroot resistance/susceptibility.

scholarly journals Analysis of microbiologically stimulated biomass of Salix viminalis L. in the presence of Cd2+ under in vitro conditions – implications for phytoremediation

2015 ◽  
Vol 57 (2) ◽  
pp. 67-78 ◽  
Author(s):  
Michał Złoch ◽  
Jarosław Tyburski ◽  
Katarzyna Hrynkiewicz
Keyword(s):  
Host Plant ◽  
Field Trials ◽  
Microbial Interactions ◽  
Salix Viminalis ◽  
Biochemical Response ◽  
Bacterial Strains ◽  
Saprophytic Fungus ◽  
Organ Specific ◽  
Underlying Mechanisms

AbstractThe efficiency of phytoremediation might be highly affected by plant-associated microorganisms, and understanding of the underlying mechanisms is still a great challenge. The primary aim of this study was to evaluate the efficiency parameters for Cd2+accumulation in the biomass of willow (Salix viminalis) as well as to define the biochemical response of the host plant when it is inoculated with selected bacterial strains (Massiliasp. andPseudomonassp.) or saprophytic fungus (Clitocybesp.) under controlledin vitroconditions. Inoculation of plants with bacterial strains affected the efficiency of phytoremediation process and was expressed as the quantity of accumulated Cd (Q), the bioaccumulation factor (BCF) and the translocation index (Ti); however, the effect was strain and plant organ specific. The level of hydrogen peroxide (H2O2), which is both an indicator of plant response to biological and/or abiotic environmental stress and a molecule involved in plant-microbial interactions, decreased under the influence of Cd2+in uninoculated plants (plant growth was inhibited by Cd2+) and increased in the inoculated variants of plants growing in the presence of Cd2+(microbiologically stimulated biomass). The saprophytic fungusClitocybesp. generally stimulated biomass and increased the level of H2O2synthesis in all the investigated plant organs and variants of the experiment. We suggest that determination of phytoremediation efficiency, and biochemical response (H2O2) of the host plant underin vitroconditions can help in predicting the final effect of plant-microbial systems in further field trials.

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