Are seeds alive?

This may seem like a very basic biological question, if a plant can emerge from a seed then of course it’s alive.  But how is it alive? It doesn’t appear to undergo photosynthesis to respire or metabolise.  I guess this question becomes more “legitimate” when you realise seeds can last hundreds of years.  In the exceptional case of the Sacred Lotus (Nelumbo nucifera) they can last thousands.

sacredlotus As we can all guess, seeds are indeed alive.  The tissues inside of a seed do appear to be active before the seed has germinated.  Each seed contains the embryo of the plant as well as a “cotyledon”.  No that’s not the name of a dinosaur, but a fancy term for a food store.  This food storage is what allows the seed to “live” for so long without needing to photosynthesize.  Please see my wondrous, MoMA worthy illustration of the inside of a dicot angiosperm seed.

seeddiagramI guess by now your next question is, “so what does the Scared Lotus do that allows its seeds to live so ridiculously long?” According to Shen-Miller, et al (1995) , the lotus’ “seeds” are actually more like fruit (yes it’s edible, but only if you’re in the mood to chew on something as hard as a rock).  Because fruits are typically fleshy (yes I had to use that word) you’d think it would rot faster, but lotus fruit walls are, in the authors’ words, “impervious” (Shen-Miller et al, 1995).   They’re so tough, that if you want to grow  lotus, this seller recommends scarring and sanding down the fruit wall until you see the inside before you plant it in water.  Take a look at some lovely sacred lotus fruit below. If you, like myself are a trypophobe…LOOK AWAY, LOOK AWAY.

lotusfruit

Yep. That flower makes these fruit.

Article:  

Shen-Miller, J., Mudgett, M.B., Schopf, J.W., Clark, S. and Berger, R. 1995. Exceptional Seed Longevity and Robust Growth: Ancient Sacred Lotus from China. Am. J. Bot. 82(11): 1367-1380.

Advertisements
This entry was posted in Uncategorized. Bookmark the permalink.

2 Responses to Are seeds alive?

  1. rajbirghuman says:

    Interesting post, love your writing style sounds more like a conversation rather than just the plain old facts 🙂
    ps. that picture made me cringe–hopefully you don’t post about honeycombs next!

    Like

    • tehmeena13 says:

      A fellow trypophobe, we have trypophobia! Honey combs aren’t too bad for me because the holes are evenly sized and geometric. However irregular holes and some that have stuff in them makes me want to take a spoon and dig out the stuff. Thanks for the compliments!

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s