期刊
JOURNAL OF CHEMICAL ECOLOGY
卷 31, 期 12, 页码 2847-2856出版社
SPRINGER
DOI: 10.1007/s10886-005-8398-8
关键词
calcium tartrate crystals; midgut; grape leafhopper; Empoasca vitis
Calcium tartrate crystals were observed in the midgut of grape leafhoppers. This unique compound was found for the first time in insects. The size of the crystals varied strongly between and within individuals with a mean length of 153 +/- 87 mu m and a mean width of 71 +/- 46 mu m. In addition, the number of crystals per individual showed a broad variation and ranged from 1 to 150 crystals/individual. The occurrence of calcium tartrate crystals as well as the number of crystals per individual followed the same seasonal pattern as seasonal vine leaf concentrations of tartaric acid found in a previous study, indicating that calcium tartrate is formed to neutralize the tartaric acid in the gut system. It further implies that the grape leafhopper, rather than being a pure phloem sucker, employs a mixed feeding strategy to satisfy its demands for calcium uptake.
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