Infection structure development

Figure 2. Infection structures developed by uredospore germlings of U. appendiculatus. (A) Diagram of the infection...

Protein Synthesis and Gene Expression. Development of the infection structures is accompanied by the synthesis of at least 15 differentiation-related (dr) proteins, i.e. proteins not present in the germling until differentiation is induced Fig. 4 (22. A downshift in the synthesis of some proteins also occurs during infection structure development. 

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. 

Time-scale of Response. A list of some of the events which occur during the development of infection structures, and the estimated times when the response occurs after contact with the inductive... 

All of the clones isolated so far hybridize with transcripts which appear in germlings at the time when the vesicles form, although the class VI clone also hybridizes with a transcript which appears during development of the appressorium. Thus, the ds-genes appear to have a role in construction of the infection structures. A more precise timing of expression will have to await additional studies. 

The penicillins are a class of compound having the general structure (1). Because of their unique effectiveness in the treatment of bacterial infections in humans, these compounds have been investigated intensively from the chemical, microbiological and clinical points of view since about 1940. The early history of these developments (see especially B-80MI51100, B-49MI51100) contains the following pivotal studies ... 

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