Gray crescent

A bioassay for gray crescent properties has been reported (Grant, 1969), and is based on the observation that ultraviolet irradiation of the vegetal hemispheres of fertilized Ram pipiens eggs causes later deficiencies in neural differentiation. Grant and Wacaster (1972) have... 

While not yet conclusive, studies on the gray crescent described above may provide yet another example of substances accumulated within the GV during oogenesis which become effective only after dispersal into the cytoplasm. It would be most significant if these or other nuclear products could be related to the cytoplasmic localizations referred to earlier. Whether any of the examples yet discussed falls into this category remains to be seen and will depend to a large- extent on continued attempts to identify the nature of the active materials and their mode of action. This alone requires continued interest in the period of maturation. However, it is possible that the various factors described above are involved in more generalized metabolic functions which, while necessary to normal development, are not directly involved in the differentiation of specific cell types. 

Description Adults dark, brownish gray. A" beetles with warty, hard wing covers, prominent snout, and white hairs on body. Larvae plump, white, A" grubs with brown heads. Eggs round, white, laid individually under a crescent-shaped cut in the fruit skin. Found in eastern North America. 

Fig.9. Models of Hspl04 function in [PSI] maintenance and curing. Sup35, striped spheres with black, crescent tails Hspl04, gray ovals Sup35 transition state, Sup35 Model 1 as per Patino et al. (1996) model 2 as per Kushnirov and Ter-Avanesyan (1998). See text for details of the models.

Exceptionally, B. cinerea can be observed to develop exclusively, forming a crescent-shaped mycelial mass to obstruct the fissure (Doneche, 1992). Changes in the chemical constitution of the grape are thus also characteristic of a gray rot attack. 

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