Talk:Plasmodesma

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Algae

I've made a few changes to make it clearer that algae have pdesma too. Other parts of the article need changing now though - e.g. refs to plant cells. Any ideas what the best way would be? Smartse (talk) 23:45, 16 April 2009 (UTC)[reply]

Number of plasmodesmata

The article stated that a "typical plant cell may have between 10³ and 10⁵ plasmodesmata connecting it with adjacent cells[9] equating to between 1 and 10 per mm²". I changed that to "...1 and 10 per µm²" since plant cells are not large enough to have even one of these junctions if we are talking about square millimeters.

Math: Assume a cubic plant cell size of 0.1 mm per side. This gives a total surface area of .06 mm² for the typical plant cell, not enough area for 1000-100000 plasmodesmata at a rate of 10 per mm².

I don't have the source books, but I am *guessing* this was just a typo, so I did a calculation to see if µ works, and it does: radius of plasmodesma (later in same paragraph): 30 nm = 0.03 µm; π*(0.03 µm)² = 0.0028 µm² for each junction; 0.0028 µm² * 10⁵ junctions = 283 µm². The surface area of a typical plant cell would be about 60,000 µm², which would easily accomodate 300 plasmodesmata.

Someone with either of the referenced texts should check on this. Redhookesb (talk) 05:49, 24 December 2009 (UTC)[reply]

Thanks for that. I think you are right about the typo, I think I added the section, I don't have the book to hand at the minute but will check when I can. Smartse (talk) 11:31, 24 December 2009 (UTC)[reply]

The error was present in the cited source, but we still need a wp:RS source for the correction, not wp:OR. LeadSongDog come howl! 21:14, 26 April 2016 (UTC)[reply]