RESERVE MATERIALS OF PLANTS. 125 



This peptone is probably, however, but a stage in the trans- 

 formation of the resting reserve material to amide bodies 

 which are transported from the food reservoirs to the seats 

 of active growth. 



So far, then, the reserve proteids proper are non-diffu- 

 sible, granular or amorphous bodies, with difficulty soluble 

 and almost without power of dialysis. They include several 

 forms which show differences in these respects. There are 

 several albumoses, soluble much more readily than the 

 other kinds and apparently nearest in constitution to the 

 diffusible peptones ; globulins, comprising members of two 

 groups which show great differences in their behaviour to 

 heat, the one coagulating between 50° and 6o°C, the other 

 between 70° and 8o° ; and albumins. In regions where 

 storage is not so evident we have in addition members 

 of the peptone group, giving characteristic reactions and 

 capable of dialysis. 



BIBLIOGRAPHY. 



(1) Pfeffer. Pringsheirri s Jahrbuch f. Wissenschaft Bot., bd. 



viii., 1872. 



(2) R.ENDLE. Aleurone grains. Annals of Botany, ii., p. 161. 



(3) Wakker. Studien der Inhaltskdrper der Pflanzenzelle. 



Jahrbucher f. Wissenschaft Bot., xix. 



(4) WERMINSKI. Ueber die Natur der Aleuronkorner. Ber. d. 



dent. Bot. Gesell., 1886. 



(5) LUDTKE. Beitrage zur kentniss der Aleuronkorner. fahr- 



bucher f. Wissenschaft Bot., xxi. 



(6) Belzung. Journal de Botanique (Morot), March and April, 



1891. 



(7) Weyl. Zeit.f Physiol. Ckem., I, 1877. 



(8) VINES. Proteid Substances in Seeds. Journal of Physiology, 



HI, p. 93. 



(9) Martin. The Proteids of the Seeds of Abrus Precatorius. 



Proc. Roy. Soc, vol. xlii., p. 331. 



(10) ZOLLER. Ber. d. deutsch. Chem. Gesell., xiii., 10, 1880. 



(11) Chittenden and Osborne. On the Proteids of the Seed of 



Maize. American Chemical Journal, 1891-92. 



(12) ZACHARIAS. Bot. Zeit., February, 1884, P- 6 7- 



