Open AccessPhylogenic points of view on the sexuality of cormophytes
Author(s) -
Michael Favre-Duchartre
Publication year - 2014
Publication title -
acta societatis botanicorum poloniae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 29
eISSN - 2083-9480
pISSN - 0001-6977
DOI - 10.5586/asbp.1981.051
Subject(s) - gametophyte , sporangium , double fertilization , biology , human fertilization , embryo , botany , sporophyte , zoology , spore , genetics , pollination , pollen tube , pollen
1) Unisexuality is spreading from gametes, through gametophytes, to sporangia and sporaphytes, individual hermaphradite plants finally becoming the ground for sex separation with cross fertilization processes; 2) male and female gametogeneses are abbreviated down to the production of 3- and 4-cell gametophytes respectively; 3) inter-archegonial double fertilizations are found elsewhere than in angiosperms; 4) in the embryo sacs of the latter the disparity of female structures linked with disyncihronic post-fertilization developments might explain the differences between the endosiperm and the embryo