Signal transduction pathway zoospore

The mechanism of repulsion or negative chemotaxis in zoospores is not yet kiK)wn, but in bacteria Ix activities are mediated by the modification of common receptor and signal transduction pathways (29). Notably, while several isoflavones with structural similarity to daidzein functioned as chemoattractants for Ph, sojacy many related flavonoids had repellent activities (i9). The importance of flavonoids in the case of Ph. sojae, and estrogenic substances in the case of A. cochlioides, in deterring infection of nonhost plants, certainly warrants additional investigation. 

Our knowledge about the system of zoospore signal transduction pathway is still not quantitative, but qualitative. However, it is our confidence that the... 

Our preliminary experiments to detect the putative receptor responsible for the host-specific attractant cochliophilin A (5), by using a probe 5,7-dihydroxyflavone incorporated with 7-O-biotinyl and 4 -azido groups slmw that the receptors are locate on the cell membrane (44). Detailed characterization of the cochliophilin A receptor would be a starting point to unravel the signal transduction pathway in zoospore chemotaxis and differentiation by host-specific plant signals. 

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