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[tannin in tetraneura ulmi]. 195114902520
the effect of tetraneura ulmi l. galling process on the activity of amino acid decarboxylases and the content of biogenic amines in siberian elm tissues.tetraneura ulmi (l.), a member of eriosomatinae subfamily, is one of the gall-forming aphids occurring on elms. sap-sucking behaviour of founding mothers results in the formation of new plant organs. this study documents the changes in the content of plant biogenic amines (putrescine, cadaverine, spermidine, tryptamine, spermine and histamine) and key enzymes of their biosynthesis: lysine decarboxylase (ldc), tyrosine decarboxylase and ornithine decarboxylase (odc) in galls and other parts of si ...201828514972
ants farm subterranean aphids mostly in single clone groups--an example of prudent husbandry for carbohydrates and proteins?mutualistic interactions are wide-spread but the mechanisms underlying their evolutionary stability and ecological dynamics remain poorly understood. cultivation mutualisms in which hosts consume symbionts occur in phylogenetically diverse groups, but often have symbiont monocultures for each host. this is consistent with the prediction that symbionts should avoid coexistence with other strains so that host services continue to benefit relatives, but it is less clear whether hosts should always ...201222747564
reproduction and dispersal in an ant-associated root aphid community.clonal organisms with occasional sex are important for our general understanding of the costs and benefits that maintain sexual reproduction. cyclically parthenogenetic aphids are highly variable in their frequency of sexual reproduction. however, studies have mostly focused on free-living aphids above ground, whereas dispersal constraints and dependence on ant-tending may differentially affect the costs and benefits of sex in subterranean aphids. here, we studied reproductive mode and dispersal ...201222804757
perianal structures in myrmecophilous subterranean aphids (insecta: hemiptera: aphididae) - comparative morphology of trophobiotic organ with its first description in lachninae.scanning electron microscopy (sem) and light stereoscopic microscopy (lsm) were used for the first time to elucidate the external morphology of the so called "trophobiotic organ" on the end of abdomen of apterous viviparous females of six aphid species (insecta: hemiptera: aphididae), representatives of the myrmecophilous, subterranean aphids from the subfamilies anoeciinae (anoecia furcata), eriosomatinae (forda formicaria, geoica utricularia, tetraneura ulmi), and lachninae (protrama flavescen ...201728642163
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