Uptake and metabolism of leaf proteins by the silverleaf whitefly

Michael E. Salvucci, Rosemarie C. Rosell, Judith K Brown

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

To determine if plant proteins can be ingested and metabolized by the silverleaf whitefly, whiteflies were fed artificial diets containing either 35S-labeled cotton leaf proteins or a fluorescently labeled recombinant leaf protein. Confocal microscopy showed that whiteflies contained fluorescence throughout their digestive tracts and in their honeydew after feeding on fluorescently labeled protein. On diets containing radiolabeled protein, 35S was ingested and either excreted as amino acids or retained in the body in protein and free amino acids. The profiles of radiolabeled whitefly polypeptides were similar for whiteflies feeding on labeled protein and labeled amino acids. Thus, whiteflies can ingest plant proteins, degrade them to free amino acids, and either excrete the amino acids or use them for de novo protein synthesis. Uptake and metabolism of radiolabel occurred when whiteflies fed on 35S-labeled leaves. Honeydew from these insects contained a small amount of labeled protein. The label in honeydew protein was primarily associated with a 22.4 kDa polypeptide. This polypeptide co-migrated with a labeled whitefly polypeptide and its synthesis was inhibited by cycloheximide. The identity and func-tion of this protein are unknown.

Original languageEnglish (US)
Pages (from-to)155-165
Number of pages11
JournalArchives of Insect Biochemistry and Physiology
Volume39
Issue number4
StatePublished - 1998

Fingerprint

Hemiptera
Bemisia argentifolii
leaf protein
Aleyrodidae
Metabolism
uptake mechanisms
metabolism
honeydew
polypeptides
Proteins
Amino Acids
proteins
plant proteins
Plant Proteins
Peptides
free amino acids
amino acids
Nutrition
body protein
cycloheximide

Keywords

  • Bemisia argentifolii
  • Bemisia tabaci
  • Hemiptera:Homoptera
  • Insect nutrition
  • Protein metabolism
  • Whitefly

ASJC Scopus subject areas

  • Insect Science
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physiology
  • Physiology (medical)

Cite this

Uptake and metabolism of leaf proteins by the silverleaf whitefly. / Salvucci, Michael E.; Rosell, Rosemarie C.; Brown, Judith K.

In: Archives of Insect Biochemistry and Physiology, Vol. 39, No. 4, 1998, p. 155-165.

Research output: Contribution to journalArticle

Salvucci, Michael E. ; Rosell, Rosemarie C. ; Brown, Judith K. / Uptake and metabolism of leaf proteins by the silverleaf whitefly. In: Archives of Insect Biochemistry and Physiology. 1998 ; Vol. 39, No. 4. pp. 155-165.
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