Developmental and cytochemical features of female gametophyte in endemic Lathyrus undulatus (Fabaceae).

摘要: The presented study describes developmental and cytochemical features of female gametophyte in Lathyrus undulatus Boiss. (Fabaceae), which belongs to subfamily Papilionoideae is endemic northwestern Turkey. ovary monocarpellate the mature ovule anatropous, bitegmic crassinucellate. Differentiation outer integument determines a Yshaped micropyle aperture. nucellar epidermis poorly developed. inner parietal layers differentiate into thin layer endothelium. hypodermally oriented archesporium distinguished as one cell. Archesporium produces cell primary sporogenous enlarges form megasporocyte. After meiotic division, megaspores organize an isobilateral manner tetrad. Only megaspore functions it chalazal members functional develops embryo sac, gives rise Polygonum type. synergids lying above egg are typical structure. antipodals ephemeral degenerate earlier without leaving any remnants. Embryo development Onagrad Suspensor degenerates at globular stage. endosperm nucleus divides mitotically free nuclear rich for insoluble polysaccharides protein. © 2013 Friends Science Publishers