Carmen And Tassie Compare Notes: Big Angel And Super Mazar Autos

[Carmen Ray]

Hi Carmen i run 18/6 i was running 20/4 in the 5x5 at first to compensate for the sunrise sunset feature on my light but backed off to 18/6 & i don't think i'll use the sunset/rise setting on my new grow i didn't see any difference using it so 18/6 it is & when i get to full blown flower my plants seem to suffer with any thing over 730 PPFD my tallest buds where at 900+ PPFD & had to bend them over to reduce PPFD started to see foxtailing from light stress but stopped after i lowered them i think you'll be best at 18/6, @730 PPFD at 18 hours gives me 47 DLI, at the seedling stage i like 200 then slowly ramp up to 400 PPFD when it gets into early veg to late veg then slowly ramp up to 650-680 PPFD & when into mid to full flowering i bump up to 730 PPFD

Thank you con. I am making a note of your recommendation. I want to try the 24/0 again, just to see what happens. I'll do that in this next grow and make adjustments from there. So you also say 18/6 ey.

 

[Carmen Ray]

I'm never signed into google and (like Gee) never get a 420mag hit unless I include site:420magazine.com in the search box.

Along with Carmen, I have (as mentioned above). I also veg my photoperiods at 24/0. Cannabis does not need a dark time as a class C3 plant.

In C3 plants, which Cannabis Sativa is...(the bookmarks are broken on that page so scroll down to"Photorespiration")

C3 plants:
"The C3 cycle is often referred to as a light-independent reaction to the process of photosynthesis. This is because the C3 cycle is not supplied directly by the photons from the ultimate source of light – the Sun."

Gosh Shed, these articles are very scientific I'm afraid they go over my head a bit.

"Photorespiration​

Photorespiration in a C3 Plant
In C3 plants, which Cannabis Sativa(1) is, photorespiration is an issue. Rubisco, which drives the Calvin reactions, cannot differentiate between CO2 and O2. Under stressful conditions, such as an excessively hot, or dry environment Rubisco will perform its reaction with oxygen instead, creating 2-Phosphoglycolate, which is ultimately useless for the plant. To try and salvage this into something usable the plant must undergo photorespiration, an incredibly wasteful pathway.
2-Phosphoglycolate will have to react with 2-Phosphoglycolate Phosphatase to give glycolate. Glycolate will then have to react with glycolate oxidase to give glyoxylate, which will then have to react with glutamate glyoxylate transaminase to get glycine. Glycine will react with glycine decarboxylase complex to give serine. Serine will then react with serine-glyoxylate-transaminase to give pyruvate, which then reacts with pyruvate reductase to give glyceride. Lastly, this glyceride must react with glycerate kinase to give a single molecule of 3-phosphoglycerate, which will only allow cycle to begin again.
Just to deal with 1 molecule of 2-phosphoglycolate the cell must waste 2 NADH and 2 ATP. Now consider the number of sites that would simultaneously going through this waste reaction."

and

"The C3 cycle is often referred to as a light-independent reaction to the process of photosynthesis. This is because the C3 cycle is not supplied directly by the photons from the ultimate source of light – the Sun. The C3 cycle instead is fueled by ATP and NADPH that are generated by utilizing the energy derived from photons in the light-dependent reactions."

I'm not sure what to make of this to be honest.

 

[InTheShed]

That plant is looking very happy, and the wires add a wonderful sculptural element to the pic!

Yeah but then they wouldn't be autos

So true.

I'm not sure what to make of this to be honest.

I try to find sentences without the sciencey language, which would be the last paragraph you posted. It says the C3 cycle occurs independent of light, instead using compounds already generated by the plant using the light.

You may have read that many folks say that the leaves droop to let you know it's had enough light for the day. What they're not accounting for is that the leaves droop and rise during lights out as well (as shown in time lapse photos), so that cycle is independent of photosynthesis.