Ultraweak photon emission from herbivory-injured maize plants |
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Authors: | Naoko Yoshinaga Kimihiko Kato Chizuko Kageyama Kenji Fujisaki Ritsuo Nishida Naoki Mori |
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Institution: | (1) Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan;(2) Laboratory of Plant Pathology, Shizuoka Agricultural Experiment Station, Tomigaoka, Toyoda-cho Iwata, Shizuoka 438-0803, Japan;(3) Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Sakyo, Kyoto 606-8502, Japan |
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Abstract: | Following perception of herbivory or infection, plants exhibit a wide range of inducible responses. In this study, we found
ultraweak photon emissions from maize leaves damaged by Helicoverpa armigera (Noctuidae). Interestingly, mechanically damaged maize leaves treated with caterpillar regurgitants emitted the same intensity
and pattern of photon emissions as those from maize leaves damaged by caterpillars. Furthermore, two-dimensional imaging of
the leaf section treated with the oral secretions clearly shows that photon emissions were observed specifically at the lip
of the wound exposed to the secretions. These results suggest that the direct interaction between maize leaf cells and chemicals
contained in caterpillar regurgitants triggers these photon emissions. |
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