circadian cycle, phytochromes, florigen manipulation

LegalizeCannabisHemp · #1 03-21-2009, 09:12 AM

Has anyone played with florigen manipulation,

I was wondering if it would be possible during flowering to have a 24 hour period with the lights on, then followed with 12 hours of dark.

LegalizeCannabisHemp · #2 03-21-2009, 10:26 AM

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GypsyBush · #3 03-21-2009, 11:19 AM

Quote:

Originally Posted by LegalizeCannabisHemp

Has anyone played with florigen manipulation,

I was wondering if it would be possible during flowering to have a 24 hour period with the lights on, then followed with 12 hours of dark.

Sure it's possible.. but is it beneficial? that seems to be the question...

I have a tray of girls 7 weeks in, they have just started to really put some weight on...

I also have another tray with small rooted clones... and I wanted them to have just a little more meat on their bones...

Figuring that the BUDS are not going to revert to veg that quick... I have made my lights 18/6 for the past few days...

Another few days and I go back to 12/12... to finish the big ones and start the little guys...

I have not noticed adverse effects, but it has only been a few days...

Cheers....

smokeybandit22 · #4 03-21-2009, 04:09 PM

man that is a FREAKY avatar. cant stop staring at it. how the hell they do that?

lampshade · #5 03-22-2009, 12:01 AM

Quote:

Originally Posted by smokeybandit22

man that is a FREAKY avatar. cant stop staring at it. how the hell they do that?

Florigen isnt well understood. But we do know it is effected by the type of phytochrome. Phytochrome is a pigment/flourophore that changes its type depending on whether it recieves red or infrared light. Red light converts phytochrome to the version that stops flowering. IR makes phytochrome the flowering type. Also naturally phtochrome will convert from the nonflowering to flowering type on its own. Exposed to any kind of light or not. This is why long dark periods promote flowering. All sativa and indica strains have this phytochrome complex. But diff strains need less darkness to flower so if you bred the right strains you could get a strain that would flower OPTIMALLY at 14 hrs. You can get most plants to flower at 14 hours light but not optimally, they take much longer.

You could also get a IR light/emitter. Then right when your lights turn off you could turn on the IR. This would speed the conversion of phtochrome from Nonflowering type to flowering type. You would only need to expose them to IR for 2 hours +/- (you need to experiment). Doing this I imagine you could run close to 20 hrs light.

Finally you could just breed in ruderalis strains. They dont depend on phytochromes to flower, they use another mechanism that works off of age. This is what makes the lowryders autoflower under 24hr light. The disadvantage is that ruderalis is very low yielding and the trait is passed on to lowryder relatives.

Hope all that typing helps, Lamp

LegalizeCannabisHemp · #6 03-22-2009, 06:52 AM

Quote:

Originally Posted by lampshade

Florigen isnt well understood. But we do know it is effected by the type of phytochrome. Phytochrome is a pigment/flourophore that changes its type depending on whether it recieves red or infrared light. Red light converts phytochrome to the version that stops flowering. IR makes phytochrome the flowering type. Also naturally phtochrome will convert from the nonflowering to flowering type on its own. Exposed to any kind of light or not. This is why long dark periods promote flowering. All sativa and indica strains have this phytochrome complex. But diff strains need less darkness to flower so if you bred the right strains you could get a strain that would flower OPTIMALLY at 14 hrs. You can get most plants to flower at 14 hours light but not optimally, they take much longer.

You could also get a IR light/emitter. Then right when your lights turn off you could turn on the IR. This would speed the conversion of phtochrome from Nonflowering type to flowering type. You would only need to expose them to IR for 2 hours +/- (you need to experiment). Doing this I imagine you could run close to 20 hrs light.

Finally you could just breed in ruderalis strains. They dont depend on phytochromes to flower, they use another mechanism that works off of age. This is what makes the lowryders autoflower under 24hr light. The disadvantage is that ruderalis is very low yielding and the trait is passed on to lowryder relatives.

Hope all that typing helps, Lamp

thanks bro!