Abstract
The spore mother cells ofEquisetum fluviatile undergo meiotic division, each forming a tetrad of spores. The spore protoplasts are separated from each other by an accumulation of mitochondria (organellar plate) at first and later on by plasma membranes, no cell wall is formed. The first layer of the sporoderm, the exine, originates from the plasmodial tapetum and is deposited at the outer side of the plasmalemma of the young spore. The exine reaches a thickness of about 330 nm. In the phase of spore greening the so-called perine, originating from the tapetum, is placed onto the exine and the inner layer of the sporoderm, the intine, is formed from the spore protoplast. The mature spore, about 40 Μm in diameter, does not enter dormancy and remains viable only for a few days.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
