Plant secondary chemistry and the evolution of feeding specialization in insect herbivores: a different perspective

1992 ◽  
pp. 207-208 ◽  
Author(s):  
David N. Karowe
Keyword(s):  
Insect Herbivores ◽  
Secondary Chemistry ◽  
Feeding Specialization ◽  
Plant Secondary Chemistry

scholarly journals The spitting image of plant defenses: Effects of plant secondary chemistry on the efficacy of caterpillar regurgitant as an anti-predator defense

2017 ◽  
Vol 7 (16) ◽  
pp. 6304-6313 ◽  
Author(s):  
Gaylord A. Desurmont ◽  
Angela Köhler ◽  
Daniel Maag ◽  
Diane Laplanche ◽  
Hao Xu ◽  
...  
Keyword(s):  
Plant Defenses ◽  
Secondary Chemistry ◽  
Predator Defense ◽  
Plant Secondary Chemistry

scholarly journals Feeding intensity of insect herbivores is associated more closely with key metabolite profiles than phylogenetic relatedness of their potential hosts

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8203
Author(s):  
Carole B. Rapo ◽  
Urs Schaffner ◽  
Sanford D. Eigenbrode ◽  
Hariet L. Hinz ◽  
William J. Price ◽  
...  
Keyword(s):  
Biological Control ◽  
Plant Species ◽  
Genetic Similarity ◽  
Phenotypic Traits ◽  
Insect Herbivores ◽  
Feeding Intensity ◽  
Secondary Chemistry ◽  
Test Species ◽  
Phylogenetic Relatedness ◽  
Phenotypic Similarity

Determinants of the host ranges of insect herbivores are important from an evolutionary perspective and also have implications for applications such as biological control. Although insect herbivore host ranges typically are phylogenetically constrained, herbivore preference and performance ultimately are determined by plant traits, including plant secondary metabolites. Where such traits are phylogenetically labile, insect hervivore host ranges are expected to be phylogenetically disjunct, reflecting phenotypic similarities rather than genetic relatedness among potential hosts. We tested this hypothesis in the laboratory with a Brassicaceae-specialized weevil, Ceutorhynchus cardariae Korotyaev (Coleoptera: Curculionidae), on 13 test plant species differing in their suitability as hosts for the weevil. We compared the associations between feeding by C. cardariae and either phenotypic similarity (secondary chemistry—glucosinolate profile) or genetic similarity (sequence of the chloroplast gene ndhF) using two methods—simple correlations or strengths of association between feeding by each species, and dendrograms based on either glucosinolates or ndhF sequence (i.e., a phylogram). For comparison, we performed a similar test with the oligophagous Plutella xylostella (L.) (Lepidoptera: Plutellidae) using the same plant species. We found using either method that phenotypic similarity was more strongly associated with feeding intensity by C. cardariae than genetic similarity. In contrast, neither genetic nor phenotypic similarity was significantly associated with feeding intensity on the test species by P. xylostella. The result indicates that phenotypic traits can be more reliable indicators of the feeding preference of a specialist than phylogenetic relatedness of its potential hosts. This has implications for the evolution and maintenance of host ranges and host specialization in phytophagous insects. It also has implications for identifying plant species at risk of nontarget attack by potential weed biological control agents and hence the approach to prerelease testing.

Indigenous Knowledge Informing Management of Tropical Forests: The Link between Rhythms in Plant Secondary Chemistry and Lunar Cycles

AMBIO ◽  
2002 ◽  
Vol 31 (6) ◽  
pp. 485-490 ◽  
Author(s):  
Kristiina A. Vogt ◽  
Karen H. Beard ◽  
Shira Hammann ◽  
Jennifer O'Hara Palmiotto ◽  
Daniel J. Vogt ◽  
...  
Keyword(s):  
Indigenous Knowledge ◽  
Tropical Forests ◽  
Secondary Chemistry ◽  
Lunar Cycles ◽  
Plant Secondary Chemistry

Mycobiont and Whole Thallus Cultures of Roccella Montagnei Bél. For the Biosynthesis of Secondary Compounds

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
G.N. Hariharan ◽  
S. Karthik ◽  
S. Muthukumar
Keyword(s):  
Carbon Source ◽  
Incubation Period ◽  
Internal Transcribed Spacer ◽  
Secondary Compounds ◽  
Acetone Extract ◽  
Optimum Growth ◽  
Secondary Chemistry ◽  
Molecular Identity ◽  
Secondary Compound

The mycobiont and whole thallus cultures of Roccella montagnei Bel. were established using soredia as an inoculum.The mycobiont cultures showed optimum growth, biomass and biosynthesis of compounds in Lilly and Barnett medium with glucose as a carbon source, micronutrients and vitamins. After the incubation period of 180 days, the cultures were harvested, and their biomass and secondary compound profiles were analysed. The HPTLC chromatogram of the acetone extract of the NT and mycobiont cultures revealed erythrinas the major biosynthesized compound in both and identified as a key biosynthate by R. montagnei. Further, the NT biosynthesized 5 additional compounds and themycobiont cultures biosynthesized 6 additional compounds. The molecular identity of the cultured mycobiont was confirmed using nuclear ribosomal Internal Transcribed Spacer (ITS) as well as the secondary chemistry. Lichen compound erythrin was identified as a key biosynthate by the cultures.

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