NDLI: Secretions from the female gametophyte and their role in spermatozoid induction in Cycas revoluta

Content Provider	Springer Nature Link
Author	Takaso, Tokushiro Kimoto, Yukitoshi Owens, John N. Ko, Masumi Mimura, Tetsuro
Copyright Year	2012
Abstract	In cycads, spermatozoids are released from pollen tubes and swim in fluid toward the archegonia. The source of this fluid was examined using Cycas revoluta Thunb. ovules placed in culture. Dissected female gametophytes just before fertilization produced copious fluid on their upper surface. The fluid first appeared around the archegonial chamber and then on the inside of the archegonial chamber. When this fluid was applied to dry turgid pollen tubes, they discharged spermatozoids 12 h later. The archegonial neck appeared as two semi-spherical swellings, whereas the four neck cells later became visible and they separated in a schizogenous manner. Many globose particles appear on the top of the archegonial neck cells when the fluid is present. The contents of pollen tubes, spermatozoids and surrounding liquid intermingle with the secreted fluid. The female gametophyte differs in ultrastructure during the stages before and after fluid secretion, the latter showing changes suggestive of fluid secretion from the female gametophyte.
Starting Page	17
Ending Page	23
Page Count	7
File Format	PDF
ISSN	21947953
Journal	Plant Reproduction
Volume Number	26
Issue Number	1
e-ISSN	21947961
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-12-19
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cycas Female gametophyte Neck cell Pollen tube Secretion Spermatozoid Cell Biology Plant Sciences Agriculture
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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