this post was submitted on 05 Apr 2024
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Gardening

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You've heard of monocots and dicots, now presenting a "tetracot"! (lemmy.world)
submitted 7 months ago by fireweed to c/gardening
10 comments fedilink hide all child comments
 

"Dragon tongue" mustard with four cotyledons (seed leaves)

Germinated outdoors so pardon the slug damage

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[โ€“] The_v 1 points 7 months ago (1 children)

In angiosperms, double fertilization occurs. The pollen grain contains two sperm cells. In the female part of the flower, one gamete forms into an egg and two gametes fuse together to form a megagametophyte.

Both the egg and the megagametophyte are fertilized by the pollen grain. The fertilized egg forms the embryo. The fertilized megagametophyte forms the endosperm . It is the fusion of 3 seperate gametes (triploid).

The endosperm (nutrient storage structure) becomes the cotyledon.

[โ€“] TropicalDingdong 0 points 7 months ago

Thank you. I used to know these things, but its been so long.