362 EMBRYOGENESIS IN PLANTS 



WENT, F. w. and thimann, k. v., 1937: Phytohonnones. Macmillan, New York. 

 WENxi F. w. and white, r., 1939: Experiments on the transport of auxin. Bot. Gaz., 



100, 465. 

 WETMORE, R. H., 1950: Tissuc and organ culture as a tool for studies in development. 



Proc. 1th Internal. Bot. Congr., Stockholm. 

 WETMORE, R. H. and MOREL, G., 1951 : Sur la culture in vitro de prothalles de Lyco- 



podium cernuum. Comp. Rend. Acad. 5c/., Paris, 233, 323. 

 WETMORE, R. H. and MOREL, G., 1951 : Sur la culture du gametophyte de Selaginella. 



Comp. Rend. Acad. Sci., Paris, 233, 430. 

 WETMORE, R. H. and WARDLAW, c. w., 1951 : Experimental morphogenesis in vascu- 

 lar plants. Ann. Rev. Plant Physiol., 2, 269. 

 WETTER, c, 1952: Beitrag zum Polaritatsproblem bei leptosporangiate Fame. 



Bioi.Zentralb., 7 \,\09. 

 WETTSTEIN, R., 1903-1908, 1911: Handbuch der systematischen Botanik. Leipzig. 

 WHiTAKER,' D. M., 1931 : Some observations on the eggs of Fucus and upon their 



mutual influence in the determination of the developmental axis. Biol. Bull, 



61, 294. 

 WHITAKER, D. M., 1937a: The effect of hydrogen ion concentration on the induction 



of polarity in Fucus eggs. L Increased hydrogen ion concentration and the 



intensity of mutual inductions by neighbouring eggs of Fucus furcatus. Jour. 



Gen. Physiol, 20, 491. 

 WHITAKER, D. M., 1937/?: The effect of hydrogen ion concentration on the induction 



of polarity in Fucus eggs. 2. The effect of diffusion gradients brought about by 



eggs in capillary tubes. Jour. Gen. Physiol, 21, 57. 

 WHITAKER, D. M., 1937c: Determination of polarity by centrifuging eggs of Fucus 



furcatus. Biol. Bull, 73, 249. 

 WHITAKER, D. M., 1938: The effect of hydrogen ion concentration on the induction 



of polarity in Fucus eggs. 3. Gradients of hydrogen ion concentration. Jour. 



Gen. Physiol, 21, 833. 

 WHITAKER, D. M., 1940a: Physical factors of growth. Cra»v//i (Suppl.). 

 WHITAKER, D. M., 19406 : The effect of shape on the developmental axis of the Fucus 



egg. Biol Bull, 78, 111. 

 WHITAKER, D. M., 1940c: The effects of ultra-centrifuging and of pH on the develop- 

 ment of Fucus eggs. /. Cell, and Comp. Physiol, 15, 173. 

 WHITAKER, D. M., 1941 : The effect of unilateral ultra-violet light on the development 



of the Fucus egg. Jour. Gen. Physiol, 24, 263. 

 WHITAKER, D. M. and CLANCY, c. w., 1937: The effect of salinity upon the growth of 



eggs of Fucus furcatus. Biol. Bull, 73, 552. 

 WHITAKER, D. M. and LOWRANCE, E. w., 1936: On the period of susceptibility in the 



egg of Fucus furcatus when polarity is induced by brief exposure to white light. 



J. Cell and Comp. Physiol, 7, 417. 

 WHITAKER, D. M. and LOWRANCE, E. w., 1940: The effect of alkalinity upon mutual 



influences determining the developmental axis in Fucus eggs. Biol. Bull, 78, 407. 

 WHITE, p. R., 1934: Potentially unlimited growth of excised tomato root tips in a 



liquid medium. Plant. Physiol, 9, 585. 

 WHITE, P. R., 1939: Controlled differentiation in a plant tissue culture. Bull 



Torrey Bot. Club, 66, 507. 

 WHITE, P. R., 1943: A handbook of plant tissue culture. Jaques Cattell Press, Lan- 

 caster, Penn. 

 wiELAND, G. R., 1906: American fossil cycads. Publ. 34, Carnegie Inst., Wash. 

 wiGER, J., 1930: Ein neuer Fall von autonomer Nuzellarembryonie. Bot. Notiser, 



368-370. 



