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Ginsenosides are triterpenoid saponins produced by Panax spp. that can accumulate to over 5% of the root dry weight. They are mildly fungitoxic to some soilborne microorganisms, and are therefore considered phytoanticipins. However, they also enhance the growth of some pathogens, including Pythium irregulare. This oomycete can selectively deglycosylate 20(S)-protopanaxadiol ginsenosides into ginsenoside...
Ginsenosides produced by ginseng (Panax quinquefolius L.) are mildly fungitoxic saponins; however, exposure of the ginseng root pathogen Pythium irregulare Buisman to ginsenosides enhances its growth in a dose dependent manner, leading to speculation that ginsenosides may function as chemoattractants and/or growth regulators in the context of the ginseng – P. irregulare pathosystem. In the present...
Main conclusionThe chlorophyll fluorescence parameterΦNOis an excellent metric for the non-destructive monitoring of disease progression, measured over a broad range of light intensities. The suitability of the slow induction chlorophyll fluorescence parameters Φ ...
American ginseng (Panax quinquefolius L.) produces triterpenoid saponins, ginsenosides, that possess mild fungitoxic activity toward some common ginseng leaf pathogens. However, numerous oomycete root pathogens of ginseng, most notably Pythium irregulare Buisman, are able to partially deglycosylate 20 (S)-protopanaxadiol ginsenosides Rb1, Rd and gypenoside XVII via extracellular glycosidases, leading...
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