624 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Disease of Sugar Beet.f — M. Hollrung includes Phoma Betce in 

 his account of the organisms that work harm to the sugar beet. He 

 finds that when the soil is too dry the plant is insufficiently nourished, 

 and more easily succumbs to the attack of the parasite. He finds, too, 

 that if the plant has a very luxurious growth at the beginning, it is less 

 able to withstand subsequent drought ; he therefore recommends spare 

 manuring at an early stage, in order to restrict an over-abundant 

 development. 



Technical Mycology.:): — F. Lafar has just issued the fifth part of his 

 handbook. W. Benecke has prepared the chapters that deal with the 

 physiology and elements of nutrition, and the action of minute organisms 

 in the breaking up of substances. J. Behrens takes up the question of 

 external influences on fermentation. In other chapters are discussed 

 symbiosis, metabiosis, and antagonism, and incidentally full directions 

 are given for the culture of fungi. The presence of enzymes and the 

 agents that favour or hinder their formation are also discussed in this 

 number. 



Fat Bodies in Plant Nuclei.§ — These bodies have been detected 

 by Carnoy in the nuclei of certain animal cells. Zopf and Nowakowski 

 had suspected their presence in the nuclei of the zoospores of Chytri- 

 diacere. R. Maire has recently demonstrated their existence in the 

 nuclei of young protobasidia of Coleosporium Campanula. The forrn- 

 mation of the minute fat particles begins in the secondary nuclei ; at a 

 more advanced stage they disappear from the nuclei, and are to be found 

 only in the protoplasm. Their presence has also been proved in the 

 nuclei of the spores of Elaphomyces variegatus. Maire considers that 

 such bodies are to be found in all nuclei. 



Aderhold, R. — Einige neue Pilze. (Some new Fungi.) 



[Several species of microfungi, parasitic on leaves, etc., are 

 described.] 



Arb. biol. Abt. Land-Forstw. Kais. Ges., 



iv. 5 (1905) pp. 461-3 (4 figs.). 



See also Hedwigia, sliv. (1905) p. 145. 



,, „ Zur biologie und Bekampfung des Mutterkornes. (Biology and 



Destruction of Ergot.) 



[It is recommended to burn the diseased grasses ; burying 

 is not always successful, and a small piece of dry scle- 

 rotium can form the ascus fruit.] 



Op. cit., v. 1 (1905) pp. 31-6. 

 See also Hedwigia, xliv. (1905) p. 145. 



Bubak, Fk. — Beitrag zur Kenntniss einiger TJredineen. (Contributions to the know- 

 ledge of some Uredinese.) 



[Notes on species already described and descriptions of new forms from 

 Bohemia, Montenegro, etc.] Ann. Mycol., iii. (1905) pp. 217-24. 



* Zeitschr. Ver. Deutsch. Zuckerind. 1905, p. 407. See also Centralbl. Bakt., 

 xiv. (1905) pp. 750-1. 



t Handbuch der technischen Mykologie (Jena, 1905) Heft 5. See also Bot. 

 Centralbl., xcix. (1905) pp. 29-30. 



X Compt. Rend. Soc. Biol., lvi. (1904) pp. 736-7. See also Ann. Mycol., iii. (1905) 

 p. 301. 



