Haustorial mother cells

One day after treatment the number of haustorial mother cells was not influenced in the triadimenol- and triadimefon-treated plants when compared with the untreated checks. Four days after inoculation, 75% of the untreated mycelia present in the host tissue formed more than five haustorial mother cells compared to 20-30% in treated tissue. In the time between 6 and 14 days after inoculation, the untreated mycelium had grown so intensely that it was impossible to count the HMC and sporulation had begun. Development of mycelia, which formed more than 5 haustorial mother cells, slowed down to a considerable extent between day 6 and day 14 in the treated plants. 

Haustorial mother cells are thought to arise only when the infection hyphae make contact with host cells however, haustorial mother cells do develop occasionally in the absence of the host (15). All of the infection structures prior to the haustorial mother cells develop as a result of the original contact by the germling with the stomate. 

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