Spermatogenesis in Chrysochus Auratus Fab

1933 ◽  
Vol 36 ◽  
pp. 275
Author(s):  
Winifred Paddock
Keyword(s):  
Chrysochus Auratus

scholarly journals ABCB transporters in a leaf beetle respond to sequestered plant toxins

2020 ◽  
Vol 287 (1934) ◽  
pp. 20201311
Author(s):  
Paulina Kowalski ◽  
Michael Baum ◽  
Marcel Körten ◽  
Alexander Donath ◽  
Susanne Dobler
Keyword(s):  
Host Plants ◽  
Leaf Beetle ◽  
Protective Role ◽  
Specific Storage ◽  
Toxic Compounds ◽  
Chrysochus Auratus ◽  
Defensive Glands ◽  
The One ◽  
Uptake And Transport

Phytophagous insects can tolerate and detoxify toxic compounds present in their host plants and have evolved intricate adaptations to this end. Some insects even sequester the toxins for their defence. This necessitates specific mechanisms, especially carrier proteins that regulate uptake and transport to specific storage sites or protect sensitive tissues from noxious compounds. We identified three ATP-binding cassette subfamily B (ABCB) transporters from the transcriptome of the cardenolide-sequestering leaf beetle Chrysochus auratus and analysed their functional role in the sequestration process. These were heterologously expressed and tested for their ability to interact with various potential substrates: verapamil (standard ABCB substrate), the cardenolides digoxin (commonly used), cymarin (present in the species's host plant) and calotropin (present in the ancestral host plants). Verapamil stimulated all three ABCBs and each was activated by at least one cardenolide, however, they differed as to which they were activated by. While the expression of the most versatile transporter fits with a protective role in the blood–brain barrier, the one specific for cymarin shows an extreme abundance in the elytra, coinciding with the location of the defensive glands. Our data thus suggest a key role of ABCBs in the transport network needed for cardenolide sequestration.

Examination of dogbane beetle (Chrysochus auratus) feeding and phenology on spreading dogbane, and considerations for biological control

2017 ◽  
Vol 11 (6) ◽  
pp. 807-814
Author(s):  
Megan C. MacEachern-Balodis ◽  
Nathan S. Boyd ◽  
Scott N. White ◽  
G. Christopher Cutler
Keyword(s):  
Biological Control ◽  
Chrysochus Auratus
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