NDLI: Avidin Expressed in Transgenic Tobacco Leaves Confers Resistance to Two Noctuid Pests, Helicoverpa Armigera and Spodoptera Litura

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Transgenic Research : Volume 11, Issue 1, February 2002

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Avidin Expressed in Transgenic Tobacco Leaves Confers Resistance to Two Noctuid Pests, Helicoverpa Armigera and Spodoptera Litura

Content Provider	Springer Nature Link
Author	Burgess, Elisabeth P.J. Malone, Louise A. Christeller, John T. Lester, Melissa T. Murray, Colleen Philip, Bruce A. Phung, Margaret M. Tregidga, Emma L.
Copyright Year	2002
Abstract	Fertile transgenic tobacco plants with leaves expressing avidin in the vacuole have been produced and shown to halt growth and cause mortality in larvae of two noctuid lepidopterans, Helicoverpa armigera and Spodoptera litura. Late first instar H. armigera larvae and neonate (<12-h-old) S. litura larvae placed on leaves excised from T$_{0}$ tobacco expressing avidin at 3.1–4.6 μM (μmoles/kg of fresh leaf tissue) had very poor growth over their first 8 days on the leaves, significant numbers had died by days 11 or 12 and all were dead by day 22 (H. armigera) or day 25 (S. litura). Similar results were obtained when late first instar H. armigera larvae were placed on leaves from T$_{1}$ plants expressing avidin at six different average concentrations, ranging from 3.7 to 17.3 μM. Two larvae on the lowest expressing leaves survived to pupation, but there was total mortality among the other groups and no relationship between avidin concentration and the effects on the larvae. Synergistic effects between avidin-expressing tobacco plants and a purified Bt toxin, Cry1Ba, were demonstrated. Late instar H. armigera larvae fed with leaves from T$_{2}$ plants expressing avidin at average concentrations of either <5.3 or >12.9 μM, and painted with Cry1Ba protein at a rate equivalent to an expression level of 0.5% of total leaf protein, died significantly faster than larvae given either of the two treatments alone. Larvae fed with avidin-expressing leaves painted with the protease inhibitor, aprotinin, at a rate equivalent to 1% of total leaf protein had mortality similar to those given avidin-leaves alone. There was no evidence of antagonism between these two proteins.
Starting Page	185
Ending Page	198
Page Count	14
File Format	PDF
ISSN	09628819
Journal	Transgenic Research
Volume Number	11
Issue Number	2
e-ISSN	15739368
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Human Genetics Plant Sciences Animal Anatomy / Morphology / Histology
Content Type	Text
Resource Type	Article
Subject	Genetics Animal Science and Zoology Biotechnology Agronomy and Crop Science

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Avidin Expressed in Transgenic Tobacco Leaves Confers Resistance to Two Noctuid Pests, Helicoverpa Armigera and Spodoptera Litura

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Avidin Expressed in Transgenic Tobacco Leaves Confers Resistance to Two Noctuid Pests, Helicoverpa Armigera and Spodoptera Litura