|
Title: Cotyledons and the Plant Embryo Post by: galpinj on Jun 10, 2016 Hello everyone!
Been getting a lot of help on this forum; hope you all don't mind another question! I was reading about mature seeds, but have a bit of trouble understanding part of the plant organization. The majority of pictures I have seen of dicots outline the epicotyl, hypocotyl, and cotyledons; however, in the pictures it seems that the cotyledons are not attached to the embryo. Epicotyl: part of embryo above where the cotyledons attach Hypocotyl: part of embryo below where the cotyledons attach Please take a look at the image below, which is pretty standard, I've looked at many such pictures, and none seem to show the cotyledons actually being attached to the embryo. Is it separate or is it physically attached to the embryo's body? Also, would the coleoptile/coleorhiza of grass monocots be considered part of the cotyledon? Thank you! Title: Re: Cotyledons and the Plant Embryo Post by: dtimmons95 on Jun 10, 2016 Hi the cotyledon is what helps fuel the plant through its early stages of growth.
If a plant has one cotyledon it’s a monocot, while having two makes it a dicot. The cotyledon reaches its maximum extent of growth by the time the mature leaves come in. I don't know if it is physically attached or where it connects to be honest |