کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2840830 1165359 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tarsal taste neurons of Helicoverpa assulta (Guenée) respond to sugars and amino acids, suggesting a role in feeding and oviposition
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش حشره شناسی
پیش نمایش صفحه اول مقاله
Tarsal taste neurons of Helicoverpa assulta (Guenée) respond to sugars and amino acids, suggesting a role in feeding and oviposition
چکیده انگلیسی

Helicoverpa assulta and Helicoverpa armigera are sibling species with different host-plant ranges. We have previously reported electrophysiological and behavioral responses of H.armigera to sugars and amino acids. Here we describe a parallel study performed on H. assulta and compare the results obtained with the two species. In females, fourteen gustatory chemosensilla, identified on one ventrolateral side of the fifth tarsomere were stimulated with sucrose, glucose, fructose, maltose, myo-inositol, and the twenty common amino acids, using the tip-recording technique. The taste receptor neurons in eight chemosensilla were identified sensitive to the sugars, myo-inositol, Lys, Glu, Arg, Trp, and Ser which all induced proboscis extension reflex (PER) when tarsi were stimulated. There was a positive correlation between electrophysiological activities and PER responses triggered by sucrose. No stimulatory effect on oviposition was observed with sugar or amino acid mixtures. In males, three chemosensilla showed responses to the four sugars, but generally weaker than in females. The major difference of the two species was the variety of amino acids triggering electrophysiological responses. The stimulatory effect of sugars and amino acids on H.assulta was also generally weaker than that on H. armigera.

Figure optionsDownload as PowerPoint slideHighlights
► We carry out a parallel study on Helicoverpa assulta to compare with H.armigera.
► We clarify sugar and amino acid sensitive receptor neurons in tarsal chemosensilla.
► The hierarchy of response intensities corresponds well with feeding behavior.
► Sugar or amino acid mixtures have no stimulatory effect on oviposition.
► The two species differ remarkably in the variety of amino acids triggering responses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Insect Physiology - Volume 57, Issue 10, October 2011, Pages 1332–1340
نویسندگان
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