378 W. Dörries: Chemische Physiologie 1915 und 1916. [22 



265. Klein, Edm. J. Über die Verhältnisse höherer Pflanzen 

 zum Kalk. (Monatsber. Ges. Luxemb. Natiirf., N. F. IX, 1915, p. 64.) - 

 Volkstümlicher Vortrag. Fedde. 



266. Knudson, Lewis. Toxicity of galactose for certain of 

 the higher plants. (Ann. Missouri Bot. Garden II, 1915, p. 659 — 666, 

 mit 1 Taf. ) — ,,Incidental observations indicate, that the galactose on pene- 

 trating kills the cells in its path. In the case of the peas grown on 1 per cent 

 galactose the peripheral layers of the cotyledon showed the original starch 

 reserve undigested. In the presence of glucose it was only the epidermis and 

 part of the cortex which suffered injury. It would ai)pear that the outer 

 layers of cells were injured before sufficient glucose had accumidated to render 

 them resistant to the toxic action of galactose, or perhaps the penetrability 

 of the inner cells for galactose was alterated by the presence of glucose. In 

 what manner the glucose antidotes the toxicity of galactose cannot yet be 

 stated. "' 



267. Knudson, L. Influence of certain carbohydrates on 

 green plants. (Mem. Cornell Univ. Agr. Exp. Stat. 9, 1916.) 



268. Kraus, G. Kalidüngung und Getreidelagerung. (Landw. 

 Jahrb. Bayern 1915. p. 1-45.) - Bef. in Bot. Centrbl. CXXIX, 1915. p. 687. 



269. Kurono, K. Über die Bedeutung des Oryzanins für die 

 Ernährung der Gärungsorganismen. (Journ. Coli. Agr. Imp. Univ. 

 Tokyo V, 1915, p. 305-324.) - Ref. in Bot. Centrbl. CXXXII, 1916, p. 379 

 bis 380. 



270. Leick, E. Die Stickstoff ernährung der Meeresalgen. 

 (Naturw. Wochenschr., N. F. XV, 1916, p. 87-91.) - Ref. in Bot. Centrbl. 

 CXXXIV, 1917, p. 84-85. 



271. Leidner. Beitrag zur Frage des Standraumes und der 

 Ernährung der einzelnen Pflanze bei der Pflanzenzüchtung. 

 (Zeitschr. f. Pflanzenzucht. III, 1915, p. 353-370.) - Ref. in Bot. Centrbl. 

 CXXXIV, 1917, p. 319-320. 



272. Lieslie, R. Beitrag zur Kenntnis der Ernährungsphysio- 

 logie extrem atmosphärischer Epiphyten. (Jahrb. wiss. Bot. LVE, 

 1915, Pfeffer-Festschr., p. 112-122.) - Ref. in Bot. Centrbl. CXXIX, 1915, 

 p. 406. 



273. Lindner, P. Eine nochmalige Nachprüfung des Ver- 

 haltens zweier Phycomyces- Stävame gegenüber verschiedenen 

 Zxickerarten und ihres Zygosporenbildungsvermögens. (Ber. D. 

 Bot. Ges. XXXIV, 1916. p. 448-452.) - Ref. in Bot. Centrbl. CXXXVEI, 

 1918, p. 201. 



274. Linsbauer, K. Notiz über die Säureempfindlichkeit der 

 Euglenen. (Österr. Bot. Zeitschr. LXV, 1915, p. 12-21.) - Ref. in Bot. 

 Centrbl. CXXIX, 1915, p. 139. 



275. Lipman, C. B. A critique of the hypothesis of the lime- 

 magnesia -ratio. (Plant World XIX, 1916, p. 83-105, 119-135.) 



276. Lipman, C. B. and Gericiie, W. F. Antagonism between 

 auions as affecting barley yields on a clay-adobe soil. (Journ. 

 Agric. Research. IV, 1915. p. 201-218.) - Ref. in Bot. Centrbl. CXXXWI, 

 1918, p. 64. 



277. Loeb, Jacques. Calcium in permeability and irritability. 

 (Journ. Biol. Chem. XXIII, 1915, p. 423-430.) - In der vorliegenden Arbeit 



