Choh Yasuyuki, Takabayashi Junji
Center for Ecological Research, Kyoto University, 2-509-3, Hirano, Otsu, 520-2113, Japan.
J Chem Ecol. 2006 Sep;32(9):2073-7. doi: 10.1007/s10886-006-9130-z. Epub 2006 Jul 28.
In response to herbivory by spider mites (Tetranychus urticae), lima bean plants produced significantly greater quantities of extrafloral nectar (EFN) than intact conspecific plants. Moreover, EFN amounts of infested plants depended on exposure to odor of infested neighbor plants. Two d after spider mite infestation, a test plant produced more EFN when exposed prior to infestation to volatiles from infested neighbor plants than when exposed to volatiles from uninfested conspecific plants. However, this effect was only detectable 2 d after spider mite infestation and vanished 4 d after infestation. These results suggest that EFN production is enhanced during the earlier stages of damage by T. urticae in response to previous exposure to volatiles from infested neighbor plants.
作为对叶螨（二斑叶螨）取食的响应，利马豆植株产生的花外蜜（EFN）数量显著多于完整的同种植株。此外，受侵害植株的花外蜜数量取决于其对受侵害相邻植株气味的接触情况。在叶螨侵害后的第2天，一株受试植株在侵害前接触受侵害相邻植株的挥发物时，比接触未受侵害同种植株的挥发物时产生更多的花外蜜。然而，这种效应仅在叶螨侵害后的第2天可检测到，在侵害后的第4天消失。这些结果表明，在二斑叶螨造成损害的早期阶段，由于之前接触过受侵害相邻植株的挥发物，花外蜜的产生会增强。
