Notes for Students [stub]

1902 Botanical Gazette  
Known as the Early Journal Content, this set of works include research articles, news, letters, and other writings published in more than 200 of the oldest leading academic journals. The works date from the mid--seventeenth to the early twentieth centuries. We encourage people to read and share the Early Journal Content openly and to tell others that this resource exists. People may post this content online or redistribute in any way for non--commercial purposes. Read more about Early Journal
more » ... out Early Journal Content at JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact CURRENY LITERATVURE 7 3 cultures, but chief interest centers in the spore-formation. Under special nutritive conditions (" starvation ") two neighboring cells put out beaks towards one another, which meet and fuse by their tips. The "compound cell" thus formed appears as two ordinary cells attached to one another by an elongated neck. "A few hours after fusion, in each compartment of the compound cell" the spores begin to round off. The author also obtained appearances that he interprets as fusion of the "nuclear apparatus" in the connecting tube. He discusses the various possible interpretations, but concludes that this phenomenon is a sexual process of the simplest kind. He also proposes a new genus to include this form, and suggests the name Zygosaccharornyces. What constitutes sexual fusion, as distinct from other fusions, is a question that is becoming increasingly difficult to answer.-J. M. C. NOTES FOR STUDENTS. CZAPEK shows'0 that the well known transformation of starch to sugar, which accompanies a lowering of temperature, especially in autumn, can be prevented if the sugar concentration is sufficient. Starch was also formed in guard cells of certain plants immersed in a io per cent. cane sugar solution at a temperature of o.-H. C. COWLES. TUCKER and TOLLENS,"S also Fruhwirth and Zielstorff, I have taken up the question of the autumnal migration of carbohydrates, proteids, phosphoric acid, and potash from the dying leaves to the perennial stems of plants. The works of Wehmer and Behrens have given rise to a disbelief in such migrations, Behrens attributing losses of these substances to decomposition and leaching out by rain water. The present authors, however, guarding against such processes, conclude that there are fall migrations of useful substances, though the amount of translocated material is very much less than was once believed.-H. C. COWLES.