CAROTENOIDS IN LAND PLANTS 



There are, however, reports that pollens do contain vitamin A- 

 active materials ^ » 3 and Von Euler, Ahlstrom, Hogberg and 

 Pettersson '^ " * have detected carotenoids chemically in pollen of the 

 white willow (Salix alba), black willow {S. nigricans), Lilium candidum 

 and Taraxacum officinale. They confirmed their absence from T. 

 latifolia and also were unable to detect them in the pollen of Populus 

 nigra, Finns montana, Betula pubescens and Campanula persicifolia. Mixed 

 pollen gathered by bees from flowers of dandelion, plum, apple, clover, 

 golden rod and aster, contained traces of carotene (0'2-0-7 (Ag./gO but 

 considerable amounts of xanthophylls (100-400 (J-g./g-)-"** When the 



Table 10 



The composition and approximate amount of Carotenoids in pollen and 

 anthers of various species (from Karrer, P., Eugster, C. H., and Faust, M. 

 (1950), Helv. Chim. Acta, 33, 300). 



* DaU reported by Tappi, G. (1949-50), Atti accad. Set. Torino, 84, 97. 



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