The multifunctional pygidial gland secretion of the Steninae (Coleoptera: staphylinidae): ecological significance and evolution

AbstractThe antimicrobial activity of the pygidial gland secretion released by adult individuals of the troglophilic ground beetleLaemostenus(Pristonychus)punctatus(Dejean, 1828), applying microdilution method with the aim to detect minimal inhibitory concentration, minimal bactericidal concentration and minimal fungicidal concentration, has been investigated. In addition, morphology of the pygidial glands is observed. We have tested 16 laboratory and clinical strains of human pathogens – eight bacterial both gram-positive and gram-negative species and eight fungal species. The pygidial secretion samples have showed antimicrobial properties against all strains of treated bacteria and fungi.Micrococcus flavusproved to be more resistant compared with other bacterial strains. More significant antimicrobial properties of the secretion are observed againstEscherichia coli, which proved to be the most sensitive bacteria.Aspergillus fumigatusproved to be the most resistant, whilePenicillium ochrochloronandPenicillium verrucosumvar.cyclopiumthe most sensitive micromycetes. Commercial antibiotics Streptomycin and Ampicillin and antimycotics Ketoconazole and Bifonazole, applied as positive controls, showed higher antibacterial properties for all bacterial and fungal strains, except forP. ochrochloron, which proved to be more resistant on Ketoconazole compared with the pygidial gland secretion ofL.(P.)punctatus. Apart from the role in ecological aspects, the antimicrobial properties of the tested secretion possibly might have medical significance in the future.

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Antimicrobial activity of the pygidial gland secretion of three ground beetle species (Insecta: Coleoptera: Carabidae)

The Science of Nature ◽

10.1007/s00114-016-1358-z ◽

2016 ◽

Vol 103 (3-4) ◽

Cited By ~ 10

Author(s):

Marija Nenadić ◽

Marina Soković ◽

Jasmina Glamočlija ◽

Ana Ćirić ◽

Vesna Perić-Mataruga ◽

...

Keyword(s):

Antimicrobial Activity ◽

Ground Beetle ◽

Gland Secretion ◽

Pygidial Gland ◽

Beetle Species ◽

Pygidial Gland Secretion

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Über Arthropodenabwehrstoffe, LXV. Die Chemische Ökologie des Grundschwimmers Laccophilus minutus / On Arthropode Defensive Compounds, LXV. The Chemical Ecology of the Water Beetle Laccophilus minutus

Zeitschrift für Naturforschung B ◽

10.1515/znb-1983-1222 ◽

1983 ◽

Vol 38 (12) ◽

pp. 1678-1685 ◽

Cited By ~ 3

Author(s):

H. Schildknecht ◽

B. Weber ◽

K. Dettner

Keyword(s):

Mass Spectrum ◽

Chemical Ecology ◽

The Other ◽

Monophyletic Group ◽

Pygidial Gland ◽

Water Beetles ◽

Water Beetle ◽

Pygidial Gland Secretion ◽

Defensive Glands ◽

Main Component

According to a GC-MS analysis of methylated extracts the abdominal tips of the water beetle Laccophilus minutus (Dytiscidae) contain four β-hydroxyalkanoic acids. On the basis of MS and GC data another compound was assigned the structure of 6-octenoic acid.The same β-hydroxyalkanoic acids, and in addition, traces of β-hydroxyheptanoic acids were identified in dissected pygidial defensive glands after trimethylsilylation. Methyl 3,4-dihydroxyphenylacetate was recognized as a further main component in the pygidial gland secretion from the mass spectrum of its TMSi ether.The Laccophilinae occupy unique position among all the dytiscide subfamilies because they are the only water beetles which store β-hydroxyalkanoic acids in their pygidial glands. On the other hand the dytiscides appear to form a monophyletic group which is supported by the occurrence of methyl 3,4-dihydroxyphenylacetate. This class of compound is also commonly encountered in the other dytiscide subfamilies

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ECOLOGICAL SIGNIFICANCE OF PHEROMONES

JOURNAL OF AGRO PROCESSING ◽

10.26739/2181-9904-2020-6-11 ◽

2020 ◽

Vol 6 (2) ◽

pp. 64-68

Author(s):

Nondira Khondhodjayeva ◽

◽

Nurmamat Rajabov ◽

Keyword(s):

Biological Significance ◽

Ecological Significance ◽

Definition Of

This article reveals the essence of the concept of "pheromones" and their biological significance. In the article variants of their application in agriculture for struggle against insects-pests are presented. The definition of term and classification of pheromones and their types are given: feromons of insects, feromons of fish, feromons of vertebrates, feromons of humans, fermons of plants, sexual feromons, anxiety feromons, trace feromons, epidemic feromons and their functions and significance for the representative's organism and the environment as a whole

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PALAEO-ECOLOGICAL SIGNIFICANCE OF PALAEOCENE CALCAREOUS ALGAE FROM THE CAUVERY BASIN, INDIA

Ecoprint An International Journal of Ecology ◽

10.3126/eco.v11i1.145 ◽

1970 ◽

Vol 11 (1) ◽

Author(s):

S. Kishore

Keyword(s):

Key Words ◽

Tidal Flat ◽

South India ◽

Distribution Patterns ◽

Calcareous Algae ◽

Ecological Significance ◽

Cauvery Basin ◽

Ecological Information

Palaeocene limestone of the Ninniyur Formation of the Cauvery Basin contains abundant well-preserved calcareous algae. These various types of calcareous algal seem to be controlled by the characteristics of each type environments in which they developed and thus they provide useful palaeo-ecological information of the Ninniyur Formation. The distribution patterns of these groups of calcareous algae, extending from tidal flat to reefal environments have been observed in the Palaeocene of the Ninniyur Formation, Cauvery Basin South India. Key words: Ninniyur formation, Calcareous algae, Palaeoecology. Ecoprint Vol.11(1) 2004.

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