Mitochondrial and peroxisomal population in post-pharyngeal glands of leaf-cutting ants after lipid supplementation

Vieira, Alexsandro Santana; Bueno, Odair Corrêa

doi:10.1016/j.micron.2014.08.004

Cited by 5 publications

(9 citation statements)

References 26 publications

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“…However, it was demonstrated in enzymological and ultrastructural studies that the post-pharyngeal gland possesses characteristics of steroid hormone-producing cells that are rich in dividing mitochondria, peroxisomes, sites with cytochrome P450 (along the smooth reticulum of two types), numerous lipid droplets and derived mitochondria, which had transformed into fat deposits [20,21,22]. Recently, it was suggested that this organ (foregut diverticulum) is specialized for lipid nutrition of adult leaf-cutting ants, i.e., absorbing, storing, metabolizing, and mobilizing lipids to the hemolymph [23].…”

Section: Discussionmentioning

confidence: 99%

Allogrooming, Self-Grooming, and Touching Behavior: Contamination Routes of Leaf-Cutting Ant Workers Using a Fat-Soluble Tracer Dye

Camargo

Puccini

Forti

et al. 2017

Insects

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The aim of this study was to determine whether worker self-grooming, allogrooming, and direct contact promotes the dispersal of substances among members of the colony. For this purpose, a tracer (Sudan III dye) was applied topically to a worker ant and the social interactions between the worker with the tracer and workers without the tracer were studied. Additionally, the worker heads were dissected to visualize whether or not the post-pharyngeal gland was stained. The post-pharyngeal glands from 50% to 70% of workers were stained depending on the size of the group. With the increase in the experimental group size, the frequency of interactions between workers increased, with touching being the most frequent behavior. The tracer dye was probably passed on by direct contact between workers, followed by self-grooming and allogrooming. These behaviors are responsible for the rapid dispersal of substances among colony members as observed in our experiment. The results therefore support the hypothesis that contact with substances promotes the contamination of nestmates, even in the absence of feeding, serving as a model for further studies on the contamination of workers with the active ingredients of insecticides.

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Section: Discussionmentioning

confidence: 99%

Allogrooming, Self-Grooming, and Touching Behavior: Contamination Routes of Leaf-Cutting Ant Workers Using a Fat-Soluble Tracer Dye

Camargo

Puccini

Forti

et al. 2017

Insects

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“…In previous studies using cytochemical ultrastructural analysis, Vieira and Bueno (2015) observed lipid droplets in the basal plasma membrane near the hemolymph. Our study demonstrated that when ants were supplemented with lipids (groups ALS 48 h and ALS 120 h), two additional fatty acids (18:2 and C18:1) were found both in the PPG and hemolymph.…”

Section: Discussionmentioning

confidence: 97%

“…In the PPG of Camponotus rufipes (F.), Dinoponera australis (E.), and Dinoponera quadriceps (K.), mitochondria are elongated and show different sizes (Falco, 1992;Schoeters & Billen, 1997). Recent studies by Vieira and Bueno (2015) have found an increase in the number of peroxisomes and mitochondria in gland cells of the PPG of A. sexdens rubropilosa workers when subjected to lipid supplementation. The mitochondrial organelle is responsible for the β-oxidation of fatty acids to Acetyl-CoA, which then enters the citric acid cycle to be further oxidized and generate ATP (Alberts et al, 2010;Nelson & Cox, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, studies have shown that the postpharyngeal glands (PPGs) are involved in lipid accumulation. PPG anatomy and lipid content were first described by Peregrine et al (1972Peregrine et al ( , 1973, Peregrine and Mudd (1974), Delage-Darchen (1976), and Vieira and Bueno (2015). mainly lipids (Arrese & Soulages, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Workers of A. sexdens rubropilosa ants supplemented with lipids showed an increase in the amount of mitochondria and peroxisomes within PPG cells compared to those without supplement (Vieira & Bueno, 2015) so, another aimed to verify whether lipids are in part oxidized to Acetyl-CoA in the mitochondria of gland cells.…”

Section: Introductionmentioning

confidence: 99%

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Lipid Mobilization and Acyl-Coenzyme A Dehydrogenase Abundance in the Postpharyngeal Gland of a Leaf-Cutting Ant

Vieira

Bueno²

2016

Sociobiology

Self Cite

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The postpharyngeal gland (PPG) in ants has a central role in lipid accumulation. Our objective was to investigate whether the PPG of workers of the leaf-cutting ant Atta sexdens rubropilosa (F.) performs lipid mobilization to the hemolymph, and to verify whether lipids in gland cells are in part oxidized to acetyl-CoA. Increased levels of fatty acids were observed in both the PPG and the hemolymph after 48 h of lipid supplementation. In contrast, after 120 h of lipid supplementation, fatty acid levels were reduced in the PPG and significantly increased in the hemolymph. The gland cells of the PPG of workers supplemented with lipids exhibited a high amount of AcylCoA dehydrogenase, and the lipids were in part β-oxidized to AcetylCoA. These findings suggest that the PPG of A. sexdens rubropilosa workers mobilize fatty acids from their gland cells to the hemolymph. Further work will be needed to elucidate lipid transport from the hemolymph to other organs in this organism.

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Fat-Soluble Substance Flow During Symbiotic Fungus Cultivation by Leaf-Cutter Ants

et al. 2019

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Mitochondrial and peroxisomal population in post-pharyngeal glands of leaf-cutting ants after lipid supplementation

Cited by 5 publications

References 26 publications

Allogrooming, Self-Grooming, and Touching Behavior: Contamination Routes of Leaf-Cutting Ant Workers Using a Fat-Soluble Tracer Dye

Allogrooming, Self-Grooming, and Touching Behavior: Contamination Routes of Leaf-Cutting Ant Workers Using a Fat-Soluble Tracer Dye

Lipid Mobilization and Acyl-Coenzyme A Dehydrogenase Abundance in the Postpharyngeal Gland of a Leaf-Cutting Ant

Fat-Soluble Substance Flow During Symbiotic Fungus Cultivation by Leaf-Cutter Ants

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