Ozone-induced changes in host-plant suitability: Interactions ofKeiferia lycopersicella andLycopersicon esculentum

1987 ◽  
Vol 13 (1) ◽  
pp. 203-218 ◽  
Author(s):  
John T. Trumble ◽  
J. Daniel Hare ◽  
Robert C. Musselman ◽  
Patrick M. McCool
Keyword(s):  
Host Plant ◽  
Host Plant Suitability ◽  
Induced Changes

Acidic fog-induced changes in host-plant suitability

1989 ◽  
Vol 15 (9) ◽  
pp. 2379-2390 ◽  
Author(s):  
John T. Trumble ◽  
J. Daniel Hare
Keyword(s):  
Host Plant ◽  
Acidic Fog ◽  
Host Plant Suitability ◽  
Induced Changes

scholarly journals Xanthomonas campestris Promotes Diffusible Signal Factor Biosynthesis and Pathogenicity by Utilizing Glucose and Sucrose from Host Plants

2019 ◽  
Vol 32 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Chunyan Zhang ◽  
Mingfa Lv ◽  
Wenfang Yin ◽  
Tingyan Dong ◽  
Changqing Chang ◽  
...  
Keyword(s):  
Host Plant ◽  
Xanthomonas Campestris ◽  
Infection Process ◽  
Plant Metabolites ◽  
Multiple Strategies ◽  
Exogenous Addition ◽  
Diffusible Signal Factor ◽  
Signal Production ◽  
Induced Changes ◽  
Encoding Genes

The plant pathogen Xanthomonas campestris pv. campestris produces diffusible signal factor (DSF) quorum sensing (QS) signals to regulate its biological functions and virulence. Our previous study showed that X. campestris pv. campestris utilizes host plant metabolites to enhance the biosynthesis of DSF family signals. However, it is unclear how X. campestris pv. campestris benefits from the metabolic products of the host plant. In this study, we observed that the host plant metabolites not only boosted the production of the DSF family signals but also modulated the expression levels of DSF-regulated genes in X. campestris pv. campestris. Infection with X. campestris pv. campestris induced changes in the expression of many sugar transporter genes in Arabidopsis thaliana. Exogenous addition of sucrose or glucose, which are the major products of photosynthesis in plants, enhanced DSF signal production and X. campestris pv. campestris pathogenicity in the Arabidopsis model. In addition, several sucrose hydrolase–encoding genes in X. campestris pv. campestris and sucrose invertase–encoding genes in the host plant were notably upregulated during the infection process. These enzymes hydrolyzed sucrose to glucose and fructose, and in trans expression of one of these enzymes, CINV1 of A. thaliana or XC_0805 of X. campestris pv. campestris, enhanced DSF signal biosynthesis in X. campestris pv. campestris in the presence of sucrose. Taken together, our findings demonstrate that X. campestris pv. campestris applies multiple strategies to utilize host plant sugars to enhance QS and pathogenicity.

scholarly journals Plant sterols and host plant suitability for a phloem-feeding insect

2010 ◽  
Vol 25 (3) ◽  
pp. 484-491 ◽  
Author(s):  
Spencer T. Behmer ◽  
Robert J. Grebenok ◽  
Angela E. Douglas
Keyword(s):  
Host Plant ◽  
Plant Sterols ◽  
Host Plant Suitability ◽  
Phloem Feeding

scholarly journals Aphid Species Specializing on Milkweed Have Distinct Bacterial Symbiont Communities

2021 ◽  
Author(s):  
Laramy Enders ◽  
Thorsten Hansen ◽  
Kirsten Brichler ◽  
John Couture ◽  
Elizabeth French
Keyword(s):  
Host Plant ◽  
Bacterial Species ◽  
Aphid Species ◽  
Community Diversity ◽  
Plant Interactions ◽  
Specialist Herbivore ◽  
Host Plant Specialization ◽  
Chemical Profiles ◽  
Induced Changes ◽  
Defensive Chemical

Abstract Host plant range is arguably one of the most important factors shaping microbial communities associated with insect herbivores. However, it is unclear whether host plant specialization limits microbial community diversity or to what extent herbivores sharing a common host plant evolve distinct microbiomes. To investigate whether variation in host plant specialization influences the composition of herbivore symbiont populations we compared bacterial diversity across three milkweed aphid species (Aphis nerii, Aphis asclepiadis, Myzocallis asclepiadis) feeding on a common host plant (Asclepias syriaca) using 16S rRNA metabarcoding. Overall, bacterial species richness did not vary with degree of host plant specialization. However, aphid species harbored distinct bacterial communities that varied in composition and relative abundance of key symbionts. Differences in aphid microbiomes were primarily due to strain variation in the obligate symbiont Buchnera and facultative symbiont Arsenophonus, as most of the low-abundant taxa were found in all three species. Interestingly, A. asclepiadis harbored a greater diversity of unique strains of Buchnera and significantly higher Arsenophonus relative abundances compared to the other two aphid species. Although many low abundance microbes were shared across all milkweed aphids, key differences exist in symbiotic partnerships that could influence additional ecological variation, including variation in ant tending observed across milkweed aphid species via microbial induced changes to honeydew or defensive chemical profiles. This study suggests generalist and specialist herbivore microbiomes are similar when feeding on a common host plant and highlights an intriguing potential role for strain level variation of key aphid symbionts in host-plant interactions.

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