NDLI: Effects of potato plants expressing a barley cystatin on the predatory bug Podisus maculiventris via herbivorous prey feeding on the plant

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Effects of potato plants expressing a barley cystatin on the predatory bug Podisus maculiventris via herbivorous prey feeding on the plant

Content Provider	Springer Nature Link
Author	Álvarez Alfageme, Fernando Martínez, Manuel Pascual Ruiz, Sara Castañera, Pedro Diaz, Isabel Ortego, Félix
Copyright Year	2006
Abstract	The aim of this study was to assess the effects of potato plants expressing a barley cystatin on a potentially cystatin-susceptible natural enemy by predation on susceptible and non-susceptible preys feeding on the plant. We have focussed on the impact of the variant HvCPI-1 C$^{68}$ → G, in which the only cysteine residue was changed by a glycine, on the growth and digestive physiology of the Colorado potato beetle (CPB), Leptinotarsa decemlineata, and the Egyptian cotton leafworm (ECW), Spodoptera littoralis. Moreover, we have studied the prey-mediated effects of the barley cystatin at the third trophic level, using the predatory spined soldier bug (SSB), Podisus maculiventris, as a model. Feeding trials conducted with CPB larvae reared on transgenic potato plants expressing the C$^{68}$ → G variant resulted in significantly lower weight gains compared to those fed on non-transformed (NT) plants. On the contrary, larger weight gains were obtained when ECW larvae, that lack digestive cysteine proteases, were reared on transgenic potato expressing the cystatin, as compared to larvae fed on NT plants. No negative effects on survival and growth were observed when SSB nymphs were exposed to HvCPI-1 C$^{68}$ → G by predation on either CPB or ECW larvae reared on transgenic potato plants expressing the barley cystatin, despite the fact that the inhibitor suppressed in vitro gut proteolysis of the predatory bug. To investigate the physiological background, biochemical analysis were carried out on guts of insects dissected at the end of the feeding assays.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	09628819
Journal	Transgenic Research
Volume Number	16
Issue Number	1
e-ISSN	15739368
Language	English
Publisher	Springer Netherlands
Publisher Date	2006-10-27
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	barley cystatin beneficial predators protease inhibitors tritrophic interactions Molecular Medicine Plant Genetics & Genomics Animal Genetics and Genomics Plant Sciences Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics Animal Science and Zoology Biotechnology Agronomy and Crop Science

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