Spectral Shift of Ultraweak Photon Emission from Sweet Potato During a Defense Response¶

Abstract

Consecutive spectral analyses of ultraweak photon emission from sweet potato showing a defense response were conducted to observe the process of physiological transition. The spectrum showed a drastic transition from 2 to 10 h after inoculation with Fusarium oxysporum, during which the emission intensity increased slowly. The spectrum was stable from 10 to 36 h after inoculation, whereas the emission intensity peaked approximately 20 h after inoculation. A change in the physiological state connected with the synthesis of defense‐related substances is suggested as contributing to this phenomenon. The spectral transition was also detected in sweet potato treated with growth hormone or exposed to alternating temperature, although with an extremely weak emission intensity. This spectral analysis of ultraweak photon emission can be used as a new means for identifying the physiological state.

Functional imaging of biophoton responses of plants to fungal infection

“…However, it is known from reports by other authors that ultra-weak biophoton emission generated from sweet potato was related to defence responses, e.g. phytoalexin accumulation, to non-pathogenic Fusarium oxysporum (Makino et al 1996;Hiramatsu 1998;Iyozumi et al 2002). According to Bennett et al (2005) and Mansfield (2005) biophoton generation is associated with hypersensitive resistance reaction in Arabidopsis, bean and tomato.…”

Photon emissions from rice cells elicited by N-acetylchitooligosaccharide are generated through phospholipid signaling in close association with the production of reactive oxygen species

“…The spectral composition was stable, while inoculated sweet potato showed disease responses [12]. Thus, the spectral composition reflects biochemical reactions in living cells.…”

“…The mean temperature in the dark box during the experiment was 26 ± 0.5°C, and the mean dark level of the photomultiplier tube was 2.6 counts s −1 cm −2 . Spectrometry of ultraweak photon emissions was performed with a photon counter (MSPCII; Hamamatsu Photonics K. K.) [12].…”

Photon Emission from Perturbed and Dying Organisms: Biomedical Perspectives

“…An important attempt to find a possible influence of human psychic states of consciousness on the statistics of photon emission oscillations from algae Acetabularia acetabulum has been undertaken [41,42]. Numerous articles were published on the enhanced UPE from injured and pathogen-attacked plant tissues [43,44] and plants exposed to extreme environmental conditions. Increased spontaneous or white-light induced delayed emissions from stressed plants have been proposed as fast biophysical tests for evaluation of plants' adaptation capacity and resistance to detrimental conditions [45][46][47][48][49][50].…”