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Vol 81, No 2 (2022)
Original article
Submitted: 2021-02-19
Accepted: 2021-03-28
Published online: 2021-04-28
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Structural and functional adaptation of the lingual papillae of the Egyptian fruit bat (Rousettus aegyptiacus): specific adaptive feeding strategies

R. M. Kandyel1, M. M.A. Abumandour2, S. F. Mahmoud3, M. Shukry4, N. Madkour2, A. El-Mansi56, F. A. Farrag7
DOI: 10.5603/FM.a2021.0042
·
Pubmed: 33954957
·
Folia Morphol 2022;81(2):400-411.
Affiliations
  1. Department of Zoology, Faculty of Science, Tanta University, Tanta, Egypt
  2. Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
  3. Department of Biotechnology, College of Science, Taif University, Taif, Saudi Arabia
  4. Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
  5. Department of Biology, Faculty of Science, King Khalid University, Abha, Saudi Arabia
  6. Department of Zoology, Faculty of Science, Mansoura University, Mansoura, Egypt
  7. Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt

open access

Vol 81, No 2 (2022)
ORIGINAL ARTICLES
Submitted: 2021-02-19
Accepted: 2021-03-28
Published online: 2021-04-28

Abstract

Background: The current investigation was aimed to clarify the correlations between the feeding strategy and lingual structure of the Egyptian fruit bat captured from the Egyptian east desert.
Materials and methods: The current work was performed on 12 adult Egyptian fruit bats that were observed grossly and with the help of the stereo, light, and scanning electron microscope. There were three types of the lingual papillae: one mechanical (filiform) and two gustatory (fungiform and circumvallate).
Results: There were seven subtypes of filiform papillae recognised on the seven lingual regions. There were few fungiform papillae distributed among the filiform papillae on the lingual tip and two lateral parts of apex and body while fungiform papillae were completely absent in the median part. There were three circumvallate papillae. The central bulb of circumvallate papillae was surrounded by one layer of two segmented circular pad. The lingual tip had cornflower-like and diamond-shaped filiform papillae.
Conclusions: Histochemical results revealed that the lingual glands showed a stronger Alcian Blue (AB)-positive reaction and gave dark blue colour, while the reaction for the periodic acid-Schiff (PAS)-stain was negative. Also, the glands exhibited a blue colour as an indication of positive AB reactivity with combined AB-PAS staining.

Abstract

Background: The current investigation was aimed to clarify the correlations between the feeding strategy and lingual structure of the Egyptian fruit bat captured from the Egyptian east desert.
Materials and methods: The current work was performed on 12 adult Egyptian fruit bats that were observed grossly and with the help of the stereo, light, and scanning electron microscope. There were three types of the lingual papillae: one mechanical (filiform) and two gustatory (fungiform and circumvallate).
Results: There were seven subtypes of filiform papillae recognised on the seven lingual regions. There were few fungiform papillae distributed among the filiform papillae on the lingual tip and two lateral parts of apex and body while fungiform papillae were completely absent in the median part. There were three circumvallate papillae. The central bulb of circumvallate papillae was surrounded by one layer of two segmented circular pad. The lingual tip had cornflower-like and diamond-shaped filiform papillae.
Conclusions: Histochemical results revealed that the lingual glands showed a stronger Alcian Blue (AB)-positive reaction and gave dark blue colour, while the reaction for the periodic acid-Schiff (PAS)-stain was negative. Also, the glands exhibited a blue colour as an indication of positive AB reactivity with combined AB-PAS staining.

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Keywords

Egyptian fruit bat, lingual papillae, scanning electron microscope (SEM), histology, histochemical examination

About this article
Title

Structural and functional adaptation of the lingual papillae of the Egyptian fruit bat (Rousettus aegyptiacus): specific adaptive feeding strategies

Journal

Folia Morphologica

Issue

Vol 81, No 2 (2022)

Article type

Original article

Pages

400-411

Published online

2021-04-28

Page views

5567

Article views/downloads

1272

DOI

10.5603/FM.a2021.0042

Pubmed

33954957

Bibliographic record

Folia Morphol 2022;81(2):400-411.

Keywords

Egyptian fruit bat
lingual papillae
scanning electron microscope (SEM)
histology
histochemical examination

Authors

R. M. Kandyel
M. M.A. Abumandour
S. F. Mahmoud
M. Shukry
N. Madkour
A. El-Mansi
F. A. Farrag

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