Host-specific chemical signals

Zoospores Use Host-specific Chemical Signals to Target Roots... 

Here we review our research results concerning zoospore attractants, repellents, cytotoxins and inhibitors of zoospore motility together with bioassay systems to survey chemical regulators toward zoospores. The first part of this review described some new findings on the effects of host-specific plant signals on chemotaxis and differentiation of oomycete zoospores. The potential role and mode of action of nonhost secondary... 

The fluid, asymmetric lipid bilayer carries within it a host of proteins. Some of them, called peripheral membrane proteins, are only partially buried in the lipid matrix and are exposed at only one membrane face or the other. Other proteins, the integral membrane proteins, are largely buried within the membrane but are exposed on both faces. Integral proteins are frequently involved in transmitting either specific substances or chemical signals through the membrane. The whole membrane is a fluid mosaic of lipids and proteins. 

Figure 2.4. Specific poiiinating and parasitic wasps ( non-pollinating fig wasps") on receptive figs of Ficus racemosa in india. Semiochemicals play a primordial role in the attraction of these species of wasps to their fig tree host. Predatory ants also use chemical signals to locate their prey on the figs (photo M. Proffit)...

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