Plant secondary chemistry mediates the performance of a nutritional symbiont associated with a tree-killing herbivore

Ecology ◽  
2012 ◽  
Vol 93 (2) ◽  
pp. 421-429 ◽  
Author(s):  
Thomas S. Davis ◽  
Richard W. Hofstetter
Keyword(s):  
Secondary Chemistry ◽  
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

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.

scholarly journals The draft genome of the specialist flea beetle Altica viridicyanea (Coleoptera: Chrysomelidae)

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Huai-Jun Xue ◽  
Yi-Wei Niu ◽  
Kari A. Segraves ◽  
Rui-E Nie ◽  
Ya-Jing Hao ◽  
...  
Keyword(s):  
Host Plant ◽  
Plant Cell Wall ◽  
Flea Beetle ◽  
Repetitive Sequences ◽  
Draft Genome ◽  
Gene Families ◽  
Ecological Speciation ◽  
Secondary Chemistry ◽  
Host Plant Specialization ◽  
Insight Into

Abstract Background Altica (Coleoptera: Chrysomelidae) is a highly diverse and taxonomically challenging flea beetle genus that has been used to address questions related to host plant specialization, reproductive isolation, and ecological speciation. To further evolutionary studies in this interesting group, here we present a draft genome of a representative specialist, Altica viridicyanea, the first Alticinae genome reported thus far. Results The genome is 864.8 Mb and consists of 4490 scaffolds with a N50 size of 557 kb, which covered 98.6% complete and 0.4% partial insect Benchmarking Universal Single-Copy Orthologs. Repetitive sequences accounted for 62.9% of the assembly, and a total of 17,730 protein-coding gene models and 2462 non-coding RNA models were predicted. To provide insight into host plant specialization of this monophagous species, we examined the key gene families involved in chemosensation, detoxification of plant secondary chemistry, and plant cell wall-degradation. Conclusions The genome assembled in this work provides an important resource for further studies on host plant adaptation and functionally affiliated genes. Moreover, this work also opens the way for comparative genomics studies among closely related Altica species, which may provide insight into the molecular evolutionary processes that occur during ecological speciation.

The integration of a community service learning water project in a post-secondary chemistry lab

2021 ◽  
Author(s):  
Karen Ho ◽  
Boris S. Svidinskiy ◽  
Sahara R. Smith ◽  
Christopher C. Lovallo ◽  
Douglas B. Clark
Keyword(s):  
Service Learning ◽  
Experiential Learning ◽  
Secondary Students ◽  
Community Service ◽  
Positive Impact ◽  
Methodological Approach ◽  
Community Service Learning ◽  
Secondary Chemistry ◽  
Post Secondary ◽  
K 12

Community Service Learning (CSL) is an experiential learning approach that integrates community service into student projects and provides diverse learning opportunities to reduce interdisciplinary barriers. A semester-long chemistry curriculum with an integrated CSL intervention was implemented in a Canadian university to analyze the potential for engagement and positive attitudes toward chemistry as a meaningful undertaking for 14 post-secondary students in the laboratory as well as for their 400 K-12 student partners in the community. Traditionally, introductory science experiments typically involve repeating a cookbook recipe from a lab book, but this CSL project allowed the post-secondary and K-12 students to work collaboratively to determine the physical and chemical properties and total dissolved solids in the water fountains from the K-12 students' schools. Post-instructional surveys were completed by all learners and were analyzed using a mixed methodological approach with both quantitative and qualitative methods. The expected audience that may be interested in this study are those involved in teaching chemistry in higher education and at the K-12 level as well as those interested in service learning, community and civic engagement, experiential learning, and development of transferable skills in chemistry. The results demonstrate that both groups of students report favorable engagement and attitudes towards learning chemistry and higher self-confidence levels on performing lab skills after the activity. Furthermore, both groups of students expressed interest in exploring future projects, which is indicative of the positive impact of CSL and the mutual benefits of the partnership.

Physiological Effect of Lichen Secondary Metabolites on the Lichen Parasite Marchandiomyces Corallinus

1999 ◽  
Vol 31 (3) ◽  
pp. 307-314 ◽  
Author(s):  
A. P. Torzilli ◽  
P. A. Mikelson ◽  
J. D. Lawrey
Keyword(s):  
Catalytic Activity ◽  
Phenolic Compounds ◽  
Secondary Metabolites ◽  
Host Preference ◽  
Secondary Compounds ◽  
Physiological Effect ◽  
Physiological Adaptation ◽  
Secondary Chemistry ◽  
Physiological Basis ◽  
Lichenicolous Fungi

AbstractIt has been suggested that the host specificity exhibited by some lichenicolous fungi depends on their ability to tolerate the secondary chemistry of potential host lichens. For example, the lichen parasite Marchandiomyces corallinus is able to degrade the tissues of the lichen Flavoparmelia baltimorensis irrespective of the presence or absence of endogenous phenolic compounds. In contrast, the degradation of tissues from the lichen Lasallia papulosa is suppressed when endogenous phenolics are not removed. We have investigated the physiological basis of this inhibition in order to understand more about how lichen chemistry infiuences host preference in lichenicolous fungi. Results showed that the secondary compounds from L. papulosa inhibit the overall growth of M. corallimis, but not the catalytic activity of its tissue-degrading polysaccharidases. This effect is different from that shown by another lichen parasite, Nectria parmeliae, where lichen compounds specifically inhibited polysaccharidase activity. Compared with the compounds of L. papulosa, the endogenous phenolics of F. baltimorensis inhibited the growth of M. corallimis substantially less and exhibited little or no inhibition of polysaccharidases. For M. corallimis, host preference appears to be associated with physiological adaptation to the chemistry of F. baltimorensis.

Effects of age and food source on secondary chemistry of larvae of Lymantria species (Lepidoptera: Lymantriidae)

2004 ◽  
Vol 94 (2) ◽  
pp. 137-143 ◽  
Author(s):  
R. Deml
Keyword(s):  
Secondary Metabolites ◽  
Developmental Stages ◽  
Secondary Compounds ◽  
Food Plants ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Compositions ◽  
Clustering Methods ◽  
Single Linkage ◽  
Secondary Chemistry ◽  
Dissimilarity Coefficients

AbstractHaemolymph and osmeterial secretions of caterpillars of Lymantria monacha (Linnaeus) and L. concolor Walker were analysed by gas chromatography/mass spectrometry for low molecular weight secondary metabolites. The similarities of their chemical compositions were determined by means of cluster analysis techniques in order to characterize possible chemical variations related to developmental stage or food of the larvae. For this purpose, two dissimilarity coefficients (Euclidean distances, Canberra metrics) and four clustering methods (UPGMA, WPGMA, WPGMC, single linkage) were combined. The patterns of secondary compounds obtained from the haemolymph and osmeterial secretions studied did not differ statistically significantly between two groups of L. monacha larvae fed with either larch, Larix decidua Mil., or Norway spruce, Picea abies (L.), indicating no relevant influence of plant chemistry. However, haemolymph of penultimate instar larvae of L. concolor fed on Rhododendroncontained a mixture of compounds differing statistically significantly from that of last instar caterpillars. The total compositions of the corresponding gland secretions were statistically identical though the presence/amounts of individual compounds varied. This suggested that the haemolymph composition reflected changing physiological requirements of the successive instars, whereas the composition of the defensive mixtures remained comparatively constant, possibly due to a constant spectrum of potential enemies. A more pronounced age-dependence of larval chemistry was shown by a similar analysis of data from various developmental stages of L. dispar (Linnaeus) and one of its food plants. This analysis suggested plant composition affected the secondary chemistry of early larval instars of L. dispar. The results are discussed in terms of the roles of secondary metabolites in defence against natural enemies.

A Comparison of Secondary Chemistry Courses and Chemistry Teacher Preparation Programs in Iowa and Saint Petersburg, Russia

2001 ◽  
Vol 78 (9) ◽  
pp. 1275 ◽  
Author(s):  
Maria S. Pak ◽  
Antony N. Lyovkin ◽  
Michael J. Sanger ◽  
Erik L. Brincks ◽  
Amy J. Phelps
Keyword(s):  
Teacher Preparation ◽  
Teacher Preparation Programs ◽  
Chemistry Teacher ◽  
Preparation Programs ◽  
Secondary Chemistry ◽  
Saint Petersburg
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