Further Studies in Neurospora Sitophila

SUMMARY

1.	Our experiments lead to the conclusion that the theory proposed by Moreau and Moruzzi concerning hormone responsibility in the formation of mature perithecia in Neurospora sitophila, is untenable.
2.	Rate of mycelial growth in N. sitophila is not linked to sex or conidial characters and seems to be greatly influenced by environmental conditions. This is not to deny that certain strains may not have an inheritently high rate of growth or vice Versa.
3.	In a mating of albinistic strains of N. sitophila, we observed in the same ascus the separation in an uniform and constant manner of characters “S” and “s.” The incomplete segregation obtained, strengthens the assumption that these organs are incipient perithecia.
4.	It is obvious that the appearance of “sclerotia” or incipient perithecia depends on the composition of the nutrient medium, but is not much influenced by the pH factor.

This work was done at The New York Botanical Garden under the direction of Dr. B. O. Dodge to whom I wish to express appreciation for suggestions and criticisms. I am also indebted to Miss Marjorie Swift, for the necessary culture material which was placed at my disposal and for many other courtesies.