
%0 Journal Article
%A Williams, EG 
%A Kaul, V 
%A Rouse, JL 
%A Palser, BF 
%T Overgrowth of Pollen Tubes in Embryo Sacs of <I>Rhododendron</I> Following Interspecific Pollinations
%J Australian Journal of Botany
%D 1986/08/01
%V 34
%N 4
%P 413-423
%K 
%R https://doi.org/10.1071/BT9860413
%U https://www.publish.csiro.au/paper/BT9860413 
%X Frequent overgrowths of pollen tubes within the embryo sac are characteristic of a number of interspecific crosses in the genus Rhododendron (Ericaceae). The combined techniques of sectioning, squashing and whole-ovule clearing have confirmed that in ovules showing this phenomenon the pollen tube fails to terminate growth and release sperms on entry into a synergid; instead it continues to grow beyond the synergid and egg cell, often filling the main body of the embryo sac with a coiled and distorted mass. Such ovules fail to develop further. The occurrence and possible causes of this error syndrome are discussed. 
