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• W4384924357 abstract "Honey bee nutritional health depends on nectar and pollen, which provide the main source of carbohydrates, proteins and lipids to individual bees. During malnutrition, insect metabolism accesses fat body reserves. However, this process in bees and its repercussions at the colony level are poorly understood. Using untargeted lipidomics and gene expression analysis, we examined the effects of different feeding treatments (starvation, sugar feeding and sugar + pollen feeding) on bees and correlated them with colony health indicators. We found that nutritional stress led to an increase in unsaturated triacylglycerols and diacylglycerols, as well as a decrease in free fatty acids in the bee fat body. Here, we hypothesise that stored lipids are made available through a process where unsaturations change lipid's structure. Increased gene expression of three lipid desaturases in response to malnutrition supports this hypothesis, as these desaturases may be involved in releasing fatty acyl chains for lipolysis. Although nutritional stress was evident in starving and sugar-fed bees at the colony and physiological level, only starved colonies presented long-term effects in honey production.La salud nutricional de la abeja melífera depende del consumo de néctar y polen, que proporcionan la principal fuente de carbohidratos, proteínas y lípidos. En un estado de desnutrición, el metabolismo de los insectos accede a las reservas del cuerpo graso. Sin embargo, en la abeja melífera, este proceso y sus repercusiones a nivel de la colonia, no se han comprendido con claridad. Utilizando lipidómica global y análisis de expresión genética, examinamos los efectos de diferentes tratamientos alimenticios en las abejas (inanición, únicamente azúcar y azúcar + polen) y los correlacionamos con indicadores de salud de la colonia. Encontramos un aumento en triacilgliceroles y diacilgliceroles insaturados y una disminución en los ácidos grasos libres en el cuerpo graso de abejas desnutridas. Hipotetizamos que estas insaturaciones en los lípidos modifican su estructura, tornándolos accesibles. Respaldamos esta hipótesis con la elevada expresión genética observada en tres desaturasas de lípidos durante desnutrición. Estas desaturasas podrían estar involucradas en la liberación de cadenas de ácidos grasos para la lipólisis. El estrés nutricional fue evidente tanto en abejas y colonias en estado de inanición y alimentadas con azúcar. Sin embargo, únicamente las colonias en estado de inanición presentaron efectos negativos a largo plazo en la producción de miel." @default.
• W4384924357 created "2023-07-22" @default.
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• W4384924357 date "2023-07-21" @default.
• W4384924357 modified "2023-10-12" @default.
• W4384924357 title "Lipidomic features of honey bee and colony health during limited supplementary feeding" @default.
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• W4384924357 doi "https://doi.org/10.1111/imb.12864" @default.
• W4384924357 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37477164" @default.
• W4384924357 hasPublicationYear "2023" @default.
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