Careful, you CAN give plants too much light

[Samwell Seed Well]

And color of light (spectrum) has more to do with the development of the plant(shape) more than the size of the plant.

Its all relative... and balances one way or another sometim3s to the detreiment of the plants quality or health but you know that

Lots of light..

No problem good vpds, co2,medium to high ec and frequent fertigation, air exchange...and you are fine.

 

[PadawanWarrior]

it was air layered from the original plant that was started a few months ago. by comparison it is the only narrow leafed plant (critical skunk) out of four (ortega, master kush skunk, nl5 skunk). the plant is healthy and has sheen and the tip burn is not severe. the yellowing leaf is from the air layering

the flowering tent sits above this tent and all of the plants were effected by too bright light. i just flipped to 12/12 btw so will see how they go. i guess at this time of year at this low humidity i will have to only grow at the lowest light setting in the flower tent. i just hope the plants in the flower tent will get their sheen back like these
View attachment 5093339

Nice. I have super low RH too. Below 10% usually. I have a little tip burn too right now. So I get what you're saying. Thanks for the pic.

 

[Kassiopeija]

I believe they were going to extremes to show what main componenets of CLI PAR light a plant uses to bulk...throwing some shade at diodes marketing for sure...

They went as far as acknoledge that green light wasnt apart of the experiment in terms that the metabolic process that absorb it doesnt depend photosynthesis effciency, where blue and red do

View attachment 5093327

but only in-vitro (solvent) - in vivo it's actually not that pronounced.

this is one of the greatest "myths" still in, say, almost everywhere, and seems to dominate the industry + its designs.

but the chlorophyl-molecule consists of a disc + tail, the latter being used to transfix it to a protein and arrange its spatial position inside the light-harvesting complex. which greatly changes its absorption spec and allowing other/higher stable excitation state(s).

then the core or antenna organize the placements of these chlorophyls to form an "electronic funnel" towards the trap - with surplus energy making it possible the exciton "travelling a longer way", better: being able to cross greater distances...jumping from & to the outer electron spheres.

It would surprise me if just blue+red resulting in best photosynthetis rates, I remember a study with blue, yellow & red to score highest.

let me just search on my desk for a pic

 

[Samwell Seed Well]

but only in-vitro (solvent) - in vivo it's actually not that pronounced.

this is one of the greatest "myths" still in, say, almost everywhere, and seems to dominate the industry + its designs.

but the chlorophyl-molecule consists of a disc + tail, the latter being used to transfix it to a protein and arrange its spatial position inside the light-harvesting complex. which greatly changes its absorption spec and allowing other/higher stable excitation state(s).

then the core or antenna organize the placements of these chlorophyls to form an "electronic funnel" towards the trap - with surplus energy making it possible the exciton "travelling a longer way", better: being able to cross greater distances...jumping from & to the outer electron spheres.

It would surprise me if just blue+red resulting in best photosynthetis rates, I remember a study with blue, yellow & red to score highest.

let me just search on my desk for a pic

Wouldnt the chlorpyhl molecules of each plant in healthy biosphere then specifically arrainge its receptors to recieve and synthesize more light based on each enviroment... just light or drought stress response where plants respond to lack of a neccisary stimuli with hardening off, or slowing growth ...a resposne to extreme efficiency would be to limit metobolic functions to limiting energy/metabolic waste

Which is why i believe is dynamic low stress, in optimal growth enviroments

 

[PadawanWarrior]

Wouldnt the chlorpyhl molecules of each plant in healthy biosphere then specifically arrainge its receptors to recieve and synthesize more light based on each enviroment... just light or drought stress response where plants respond to lack of a neccisary stimuli with hardening off, or slowing growth ...a resposne to extreme efficiency would be to limit metobolic functions to limiting energy/metabolic waste

Which is why i believe is dynamic low stress, in optimal growth enviroments

 

[rootforme]

 

[Kassiopeija]

me just search on my desk for a pic

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6314458/

you see the various colors associated covering the whole PAR (+violet & darkred) range with the circle around the chl-mol indicating its relative strength of light absorption

there are other studies illustrating basically the same, also showing the precise frequency

I cannot find older studies depicting this, believe the used technique to gather this info must be relatively new

 

[Samwell Seed Well]

View attachment 5093374

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6314458/

you see the various colors associated covering the whole PAR (+violet & darkred) range with the circle around the chl-mol indicating its relative strength of light absorption

there are other studies illustrating basically the same, also showing the precise frequency

I cannot find older studies depicting this, believe the used technique to gather this info must be relatively new

Will read, pretty cool.

"In this work, we present two-dimensional electronic–vibrational (2DEV) spectra of LHCII isolated from spinach, demonstrating the possibility of using this technique to track the transfer of electronic excitation energy between specific pigments within the complex."

 

[Kassiopeija]

Wouldnt the chlorpyhl molecules of each plant in healthy biosphere then specifically arrainge its receptors to recieve and synthesize more light based on each enviroment...

the way the photosystems + LHCs are designed is a compromise to harvest an ever-changing sun-spectrum still at an efficient trade-off, and being able to negate sudden changes.

yes, esp. landplants can adapt - in multiple ways - but not by alternating or changing the internal structure of the photosystems. that's genetically hardcoded - the photosystems still are almost the same as within cyanobacteria.

it's rather chloroplast movement & their number, leaf movement, LHC-antenna travel, shield pigment creation, or generally another general plant architecture like broad vs narrow leaf (as in response to low vs high irradiance)

 

[Samwell Seed Well]

the way the photosystems + LHCs are designed is a compromise to harvest an ever-changing sun-spectrum still at an efficient trade-off, and being able to negate sudden changes.

yes, esp. landplants can adapt - in multiple ways - but not by alternating or changing the internal structure of the photosystems. that's genetically hardcoded - the photosystems still are almost the same as within cyanobacteria.

it's rather chloroplast movement & their number, leaf movement, LHC-antenna travel, shield pigment creation, or generally another general plant architecture like broad vs narrow leaf (as in response to low vs high irradiance)

Big catch all.

Never thought of specific leaf design as being a metric in photosythesis efficency..figured that was internal structures that compensated...