Skip to main content
Journal cover image

Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.).

Publication ,  Journal Article
Nijhout, HF
Published in: The Journal of experimental biology
February 1975

Caterpillars of Manduca sexta use two distinct transport mechanisms for the excretion of dyes. One pump (Type A) has a high affinity for acid (anionic) dyes and occurs in the midgut and medial Malpighian tubules. Acid dyes accumulate rapidly in the lumen of the midgut while the Malpighian tubules appear to play only a minor role in the excretion of these dyes. The other pump (Type B) excretes basic (cationic) dyes and is located primarily in the proximal Malpighian tubules. Evidence is presented that hippuric acid competes with acid dyes for excretion by both midgut and Malpighian tubules. After the final-instar larva purges its gut the ability of the midgut and Malpighian tubules to excrete dyes gradually decreases. Sixty hours after the purge only the Malpighian tubules retain some dye excreting activity.

Duke Scholars

Published In

The Journal of experimental biology

DOI

EISSN

1477-9145

ISSN

0022-0949

Publication Date

February 1975

Volume

62

Issue

1

Start / End Page

221 / 230

Related Subject Headings

  • Time Factors
  • Physiology
  • Malpighian Tubules
  • Lepidoptera
  • Larva
  • Hippurates
  • Dinitrophenols
  • Cloaca
  • Biological Transport
  • Animals
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Nijhout, H. F. (1975). Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.). The Journal of Experimental Biology, 62(1), 221–230. https://doi.org/10.1242/jeb.62.1.221
Nijhout, H. F. “Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.).The Journal of Experimental Biology 62, no. 1 (February 1975): 221–30. https://doi.org/10.1242/jeb.62.1.221.
Nijhout HF. Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.). The Journal of experimental biology. 1975 Feb;62(1):221–30.
Nijhout, H. F. “Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.).The Journal of Experimental Biology, vol. 62, no. 1, Feb. 1975, pp. 221–30. Epmc, doi:10.1242/jeb.62.1.221.
Nijhout HF. Excretory role of the midgut in larvae of the tobacco hornworm, Manduca sexta (L.). The Journal of experimental biology. 1975 Feb;62(1):221–230.
Journal cover image

Published In

The Journal of experimental biology

DOI

EISSN

1477-9145

ISSN

0022-0949

Publication Date

February 1975

Volume

62

Issue

1

Start / End Page

221 / 230

Related Subject Headings

  • Time Factors
  • Physiology
  • Malpighian Tubules
  • Lepidoptera
  • Larva
  • Hippurates
  • Dinitrophenols
  • Cloaca
  • Biological Transport
  • Animals