Larval and adult digestive tract of the carrion beetle Oxelytrum discicolle (Brullé, 1840) (Coleoptera: Silphidae)

Toni, Alessandra Santana Batista; Fialho, Verônica Saraiva; Cossolin, Jamile Fernanda Silva; Serrão, José Éduardo

doi:10.1016/j.asd.2022.101213

Cited by 3 publications

(1 citation statement)

References 66 publications

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“…The midgut originates from the entoderm and is the main place for food digestion and nutrient absorption [ 39 ], especially in maintaining ion balance and water transport [ 34 , 40 ]. The surface of the midgut is sometimes smooth and uniform, sometimes with saccate protrusions, which are globular, filiform elongate, or finger-like papillae, and it varies in position, number, arrangement, and nomenclature among different species and groups [ 33 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. The hindgut originates from the ectoderm and is divided into three parts: the ileum, colon, and rectum [ 49 ].…”

Section: Introductionmentioning

confidence: 99%

Morphological Study of the Alimentary Canal and Malpighian Tubules in the Adult of the Pollen Beetle Meligethes (Odonthogethes) chinensis (Coleoptera: Nitidulidae: Meligethinae)

Chen

Liu

Giulio

et al. 2023

Insects

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Meligethes (Odonthogethes) chinensis is a highly specialized species of Nitidulidae in China that takes pollen as its main food source, and its main host plant is Rubus idaeus L. (Rosaceae). In this study, the structural morphology of the alimentary canal and Malpighian tubules of adult M. (O.) chinensis was observed under light, fluorescence, and scanning electron microscopy. The alimentary canal of adult M. (O.) chinensis is divided into foregut, midgut, and hindgut. The foregut is the shortest and consists of the pharynx, esophagus, proventriculus, and cardiac valve. The midgut is a straight, distended, cylindrical, thin-walled tube. Numerous blunt-fingered gastric ceca are distributed irregularly throughout the midgut. The hindgut is subdivided into the ileum, colon, and rectum. The ileum is coiled. The colon gradually enlarges posteriorly. The rectum is thickly muscled and followed by a membranous structure. The openings of proximal Malpighian tubules are evenly inserted into the junction of the midgut and hindgut, and distal Malpighian tubules are evenly attached to the colon to form a cryptonephridial system. In this study, we also compare the structure and infer the function of the alimentary canal and Malpighian tubules among beetles, as well as discuss the evolutionary and taxonomical implications.

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Section: Introductionmentioning

confidence: 99%

Morphological Study of the Alimentary Canal and Malpighian Tubules in the Adult of the Pollen Beetle Meligethes (Odonthogethes) chinensis (Coleoptera: Nitidulidae: Meligethinae)

Chen

Liu

Giulio

et al. 2023

Insects

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A beetle for prosecution: exogenous DNA detection from larval and adult gut of a Neotropical carrion beetle

Toni

Serrão

Fialho

2023

Forensic Sci Med Pathol

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Targeting Syntaxin 1A via RNA interference inhibits feeding and midgut development in Locusta migratoria

Liu,

Gao,

et al. 2024

Insect Science

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Syntaxin 1A (Syx1A) has diverse and indispensable functions in animals. Previous studies have mainly focused on the roles of Syx1A in Drosophila, and so how Syx1A operates during the development of other insects remains poorly understood. This study investigated whether disrupting LmSyx1A using RNA interference (RNAi) affects the growth and development of Locusta migratoria. LmSyx1A was expressed in all tissues tested, with the highest expression observed in the fat body. After 5th‐instar nymphs were injected with double‐stranded LmSyx1A (dsLmSyx1A), none of the nymphs were able to molt normally and all eventually died. The silencing of LmSyx1A resulted in the cessation of feeding, body weight loss, and atrophy of the midgut and gastric cecum in locusts. Hematoxylin and eosin (H&E) staining showed that the columnar cells in the midgut were severely damaged, with microvilli defects visible in dsLmSyx1A‐injected nymphs. Secretory vesicles were observed with transmission electron microscopy (TEM). In addition, reverse transcription quantitative polymerase chain reaction (RT‐qPCR) further indicates that silencing LmSyx1A repressed the expression of genes involved in the insulin/mammalian target of rapamycin (mTOR)‐associated nutritional pathway. Taken together, these results suggest that LmSyx1A significantly affects the midgut cell layer of locust nymphs, which was partially associated with the downregulation of the insulin/mTOR‐associated nutritional pathway. Thus, we argue that LmSyx1A is a suitable target for developing dsRNA‐based biological pesticides for managing L. migratoria.

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Larval and adult digestive tract of the carrion beetle Oxelytrum discicolle (Brullé, 1840) (Coleoptera: Silphidae)

Cited by 3 publications

References 66 publications

Morphological Study of the Alimentary Canal and Malpighian Tubules in the Adult of the Pollen Beetle Meligethes (Odonthogethes) chinensis (Coleoptera: Nitidulidae: Meligethinae)

Morphological Study of the Alimentary Canal and Malpighian Tubules in the Adult of the Pollen Beetle Meligethes (Odonthogethes) chinensis (Coleoptera: Nitidulidae: Meligethinae)

A beetle for prosecution: exogenous DNA detection from larval and adult gut of a Neotropical carrion beetle

Targeting Syntaxin 1A via RNA interference inhibits feeding and midgut development in Locusta migratoria

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