Endosymbiotic bacteria as a source of carotenoids in whiteflies

Endosymbiotic bacteria as a source of carotenoids in whiteflies.

Although carotenoids serve important biological functions, animals are generally unable to synthesize these pigments and instead obtain them from food. However, many animals, such as sap-feeding insects, may have limited access to carotenoids in their diet, and it was recently shown that aphids have acquired the ability to produce carotenoids by lateral transfer of fungal genes. Whiteflies also...

Northern berries as a source of carotenoids.

Carotenoids are bioactive substances in human diet. The aim of the study was to determine β-carotene and xanthophylls in four berries species. An HPLC gradient elution system were used for separation and quantification of the carotenoids. The highest total carotenoid content among the berries studied was found in cloudberry (2840 μg/100g dw), followed by blueberry (2140 μg/100 g). All berries h...

Genome composition of endosymbiotic bacteria

Due to small effective population sizes and lack of recombination, the efficacy of selection is assumed to be reduced in the genomes of endosymbiontic bacteria, according to the neutral and slightly deleterious theory of evolution. Five such genomes have been completely sequenced, i.e. Buchnera aphidicola (BAp, BSg, BBp), Wigglesworthia glossinidia (Wgl) and Blochmannia floridanus (Bfl). Indeed...

the significance of conjunction as a cohesive device in teaching writing

the research questions were as follows: 1. is there any relationship between the students concious awareness of the form and implications of the conjuncations and their improvement in using appropriate conjunctions? 2. does students knowledge of the from and the implications of the conjunctions help them to produce more coherent writings. 3. does a comparison between english conjunctions and th...

Prevalence and genetic diversity of endosymbiotic bacteria