Planthopper "adaptation" to resistant rice varieties: Changes in amino acid composition over time

Chen, YH; Bernal, CC; Tan, J; Horgan, FG; Fitzgerald, MA

Planthopper "adaptation" to resistant rice varieties: Changes in amino acid composition over time

Chen, YH Bernal, CC Tan, J Horgan, FG

Fitzgerald, MA

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Publication Type:: Journal Article
Citation:: Journal of Insect Physiology, 2011, 57 (10), pp. 1375 - 1384
Issue Date:: 2011-10-01

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Field	Value	Language
dc.contributor.author	Chen, YH	en_US
dc.contributor.author	Bernal, CC	en_US
dc.contributor.author	Tan, J	en_US
dc.contributor.author	Horgan, FG https://orcid.org/0000-0003-3796-667X	en_US
dc.contributor.author	Fitzgerald, MA	en_US
dc.date.available	2011-07-05	en_US
dc.date.issued	2011-10-01	en_US
dc.identifier.citation	Journal of Insect Physiology, 2011, 57 (10), pp. 1375 - 1384	en_US
dc.identifier.issn	0022-1910	en_US
dc.identifier.uri	http://hdl.handle.net/10453/115820
dc.description.abstract	The brown planthopper, Nilaparvata lugens, shows considerable geographic and temporal variability in its response to varieties of cultivated rice. N. lugens has repeatedly " adapted" to resistant rice varieties; however, the physiological changes underlying planthopper adaptation are poorly understood. Endosymbionts within planthoppers, such as yeast-like endosymbionts (YLS) could play a role as they produce essential amino acids for planthoppers. We used a full factorial study to determine how natal rice variety, exposed rice variety, YLS presence, and the number of reared generations affected nymphal development, planthopper total nitrogen content, and planthopper hydrolyzed amino acid profiles. Nymphal development was strongly influenced by a four-way interaction between the exposed rice variety, natal rice variety, number of reared generations, and YLS presence. While symbiosis improved nymphal performance in the 8th generation, it appeared to be a drain on nymphs in the 11th generation, when the aposymbiotic nymphs actually showed higher performance than the symbiotic nymphs. This suggests that the symbiotic relationship may be acting beneficially in one generation while acting as a drain during another generation. Aposymbiotic planthoppers reared for 11 generations had a higher proportional concentration of rare amino acids than those reared for 8 generations, indicating that the planthopper itself appears to improve its ability to acquire rare amino acids. Therefore, the change in amino acid composition of planthoppers suggests an underlying change in protein expression or amino acid metabolism over time. © 2011 Elsevier Ltd.	en_US
dc.relation.ispartof	Journal of Insect Physiology	en_US
dc.relation.isbasedon	10.1016/j.jinsphys.2011.07.002	en_US
dc.subject.classification	Entomology	en_US
dc.subject.mesh	Animals	en_US
dc.subject.mesh	Hemiptera	en_US
dc.subject.mesh	Oryza sativa	en_US
dc.subject.mesh	Nitrogen	en_US
dc.subject.mesh	Amino Acids	en_US
dc.subject.mesh	Adaptation, Biological	en_US
dc.subject.mesh	Symbiosis	en_US
dc.subject.mesh	Nymph	en_US
dc.subject.mesh	Female	en_US
dc.subject.mesh	Oryza	en_US
dc.title	Planthopper "adaptation" to resistant rice varieties: Changes in amino acid composition over time	en_US
dc.type	Journal Article
utslib.citation.volume	10	en_US
utslib.citation.volume	57	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0607 Plant Biology	en_US
utslib.for	0604 Genetics	en_US
utslib.for	0606 Physiology	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	10	en_US
pubs.publication-status	Published	en_US
pubs.volume	57	en_US

Abstract:

The brown planthopper, Nilaparvata lugens, shows considerable geographic and temporal variability in its response to varieties of cultivated rice. N. lugens has repeatedly " adapted" to resistant rice varieties; however, the physiological changes underlying planthopper adaptation are poorly understood. Endosymbionts within planthoppers, such as yeast-like endosymbionts (YLS) could play a role as they produce essential amino acids for planthoppers. We used a full factorial study to determine how natal rice variety, exposed rice variety, YLS presence, and the number of reared generations affected nymphal development, planthopper total nitrogen content, and planthopper hydrolyzed amino acid profiles. Nymphal development was strongly influenced by a four-way interaction between the exposed rice variety, natal rice variety, number of reared generations, and YLS presence. While symbiosis improved nymphal performance in the 8th generation, it appeared to be a drain on nymphs in the 11th generation, when the aposymbiotic nymphs actually showed higher performance than the symbiotic nymphs. This suggests that the symbiotic relationship may be acting beneficially in one generation while acting as a drain during another generation. Aposymbiotic planthoppers reared for 11 generations had a higher proportional concentration of rare amino acids than those reared for 8 generations, indicating that the planthopper itself appears to improve its ability to acquire rare amino acids. Therefore, the change in amino acid composition of planthoppers suggests an underlying change in protein expression or amino acid metabolism over time. © 2011 Elsevier Ltd.

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http://hdl.handle.net/10453/115820