Talk:Heterospory

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Wiki Education Foundation-supported course assignment

This article was the subject of a Wiki Education Foundation-supported course assignment, between 5 January 2021 and 12 March 2021. Further details are available on the course page. Student editor(s): Hrobertson2. Peer reviewers: ConnorGomez.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 22:19, 17 January 2022 (UTC)[reply]

Untitled

The second sentence in the Origin of Heterospory is not a fact. I would re-word it to say that "some research done concludes the possibility of." The addition of the author or sciencest into the sentence would be good too. Aivaldez94 (talk) 03:08, 13 April 2017 (UTC)[reply]

Wiki Education Foundation-supported course assignment

This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Vostroyan1, Ahweiss2. Peer reviewers: Aivaldez94, Hsp.miller.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 23:24, 16 January 2022 (UTC)[reply]

Question For Plantsurfer

Hi plantsurfer, Vostroyan1 and I are the students working on this page through our university. Our professor has expressed concern about the following passage. She does not fully aggree with the content and would like to see a source. As this was from the original article before we started we would like to ask if you know more about this Ahweiss2 (talk) 20:37, 19 April 2017 (UTC)[reply]

"In exosporic species, the smaller spores germinate into free-living male gametophytes and the larger spores germinate into free-living female gametophytes. "

Hi Ahweiss2. "Exosporic" means that the gametophyte develops into a multicellular organism outside the spore, so to that extent the statement is correct. Homosporic (isosporic) species were originally, and remain today, exclusively exosporic. However, it needs to be made clear that early heterosporous species also had exosporic, free-living gametophytes. A well-known example is the late Devonian tree species Archaeopteris halliana. Only heterosporic species evolved endospory such as that exhibited by the seed ferns and arborescent clubmosses. And of course, all modern seed plants are heterosporous and have endosporic gametophytes. Good sources for these points are the references cited by the article, such as Stewart and Rothwell. Hope this helps. Plantsurfer 21:09, 19 April 2017 (UTC)[reply]

Did heterospory evolve from clubmosses?

Hi @Plantsurfer, I am studying nonseed plant evolution and I am wondering if the sentence in the lead paragraph about heterospory evolving from clubmosses is accurate. In the article on Lycopodiopsida, it mentions that "Club-mosses (Lycopodiales) are homosporous, but the genera Selaginella (spikemosses) and Isoetes (quillworts) are heterosporous". Thank you. RowletChess (talk) 08:46, 14 May 2023 (UTC)[reply]