When does the seed start using photosynthesis?

A

Achieve2013

Member

• Jul 20, 2013

• #1

So when does the seed actually start using its chlorophyll for photosynthesis? Is it as soon as their immature leaf receive sunlight? I been doin some research, learning a lot more, yet can't find a clear answer for this... help?? maybe a total noob question??

 

blacksun

New Member

• Jul 20, 2013

• #2

Photosynthesis starts as soon as the reaction centres start getting light. Reaction centres are the proteins that contain the green chlorophyll pigments that absorb the light the plant uses.

So, as soon as you see green.

http://en.wikipedia.org/wiki/Photosynthesis

 

A

Achieve2013

Member

• Jul 20, 2013

• #3

and that is not part of the root when it is seedling? like the part that looks like the bean only or the root also starts the proteins when they get light? lol sorry and thanx for replying!

actually doesnt really matter to why i wanted to know that answer... bleh... lol

 

DoobieBrother

Well-Known Member

• Jul 20, 2013

• #4

The tap root is comprised of undifferentiated cells, meaning they will change depending on what's needed of them.
It will start as a root, and any of it above ground will react to the light and produce the hormones that will signal the sprout to change it to a trunk and grow leaves & stems.
The stuff that remains underground will continue on as a root as it develops.

 

topfuel29

Well-Known Member

• Jul 20, 2013

• #5

every seed has a miniature plant in it.
Cotyledon (leaf), Radicle (shoot), hypocoyl(root), all in primordia form.
Photosynthesis probably starts when the first true set off leaves are being formed.
The cotyledons are nothing more than sacks of starch the seedling feeds off of until it can grow it's own leafs to start making food on it's own.

 

A

Achieve2013

Member

• Jul 20, 2013

• #6

awsome... thanx guys... gimme a moment while this sinks in... pretty common sense but amazing... so i want them to see light as soon as possible as long as they arnt in harsh environments for them, im thinkin?

 

ProfessorPotSnob

New Member

• Jul 20, 2013

• #7

Most indoor growers turn the lights on before the seeds have broken surface to speed this process but some will use dark and then often begin with pale sprouts due to no light .