spanishmainly
Active Member
I can't find it by searching. And I've never done it myself, so....
So- What exactly is pre-vegging?
- Thread starter spanishmainly
- Start date
Milovan
Well-Known Member
I 2nd this.
BarnBuster
Virtually Unknown Member
i never heard of the term either but.....
https://www.rollitup.org/indoor-growing/303267-pre-veg-your-missing-link.html
spanishmainly
Active Member
Awesome, thanks.
I got the term from DNA Genetics site. http://dnagenetics.com/la-confidential
It says pre-vegging is needed to make LA Confidential yield well.
Red1966
Well-Known Member
So one guy calls the seedling or equivalent size clone "pre-vegging". Not really an accepted use. The DNA site doesn't offer a clue as to what they mean. Unless they're referring to trimming the fan leaves, which is properly called "trimming the fan leaves". Perhaps you should ask them?
SnapsProvolone
Well-Known Member
Wonder what lighting cycle is used for this "preveg". Lol. Really its just veg.
Ou8aCracker2
Well-Known Member
IMO pre vegging is when you have a rooted clone and veg it under fluoros until it has a nice rootmass,then you throw it into veg under full HID lighting.
Another way to look at it is if you're going to do a true higj density SOG.You.would do just as above,then either throw straight into flower or veg for 3-5 days then flower.
Another way to look at it is if you're going to do a true higj density SOG.You.would do just as above,then either throw straight into flower or veg for 3-5 days then flower.
spanishmainly
Active Member
Funnily enough, that's why I'm interested the topic. I want to produce clones for a SOG with really well developed roots but no vegetative development.
hyroot
Well-Known Member
added 630 red light will promote root growth. enzyme teas (seed sprout) or coconut water enzymes will promote root growth, alfalfa meal will promote root growth.
pre veg is just a way of explaining different stages of transplanting to nooby that is clueless. theres rooting or sprouting, veg, flower and harvest. thats it.
GrowByDesign
Member
huh...I've been doing that for a while...didn't know it was an actual "thing" though...I call it "holding back" or 'runting" and do it as a way to manage plant growth in my veg cycle...as a means of SLOWING DOWN a plants vegetative growth rate...'course I don't do all that biological whatsahoosit he goes on about...but I'm pretty damned sure it doesn't help improve my yields...
*scratches head*
tikitoker
Active Member
not to step on toes here but the correct wavelength for enhancing/promoting root development is 660. weather it be during germination or propagation, without 660 activating the phytochrome the plants cannot see any other color.
I the case of germination, 660 would be used alone and only during pre-emergence, once the dicot opens it's cotyledon then the action spectrum is necessary to activate the plants chloro A+B+C+E+D, the "red" spectrum only serves purpose to stem elongation and flower development .
tikitoker
Active Member
that's why I use it to put my girls to sleep.
and the 630/660 boosters to enhance flower.
Attachments
tikitoker
Active Member
[SIZE=+0]Effect of light on Growth and Development[/SIZE]
[SIZE=+0]-Light quality and quantity are the most significant environmental factors affecting plant development.[/SIZE]
[SIZE=+0]-Light induces dramatic changes in morphology and biochemical (protein) composition.[/SIZE]
[SIZE=+0]How does light induce such changes? e.g. increase in rubisco, LHC[/SIZE]
[SIZE=+0]A Simple Model of Signal-induced Responses[/SIZE]
[SIZE=+0]1. Signal perception by a receptor[/SIZE]
[SIZE=+0]2. Signal transduction[/SIZE]
[SIZE=+0] a) Communcate signal to other cell parts[/SIZE]
[SIZE=+0] b) Amplify the signal[/SIZE]
[SIZE=+0] c) Network and cross-talk[/SIZE]
[SIZE=+0]3. Primary response[/SIZE]
a) Increase or decrease in gene expression
[SIZE=+0] b) Change from inactive protein ---> active protein
4. Physiological or cellular response.[/SIZE]
[SIZE=+0]Plants have 3 types of Photoreceptors[/SIZE]
[SIZE=+0]1. Phytochrome 660 /730 nm[/SIZE]
[SIZE=+0]2. Blue light receptor 400-500 nm[/SIZE]
[SIZE=+0]3. UV-B Receptors 260-350 nm[/SIZE]
[SIZE=+0]Phytochrome plays a critical role in every stage of development.[/SIZE]
e.g. seed germination (lettuce)
Different Intensities of light induce different responses
a. Very low fluence (VLF) response :
b. Low fluence (LF) responses
c. High irradiation reactions (HIR)
[SIZE=+1]I. PHYTOCHROME [/SIZE][SIZE=+0]: A red light receptor[/SIZE]
[SIZE=+0]Absorbs in the Red 660 nm, Red induces change[/SIZE]
[SIZE=+0]Absorption in the Far red 730 nm reverses it.[/SIZE]
[SIZE=+0]Red light causes many changes: e.g.[/SIZE]
[SIZE=+0] Seed germination[/SIZE]
[SIZE=+0] Inhibition of stem elongation[/SIZE]
[SIZE=+0] Leaf expansion[/SIZE]
[SIZE=+0]Present in all tissues:[/SIZE]
[SIZE=+0] Roots, Shoots, Leaves[/SIZE]
Phy is found in the nucleus and cytoplasm, and it is not embedded in the membrane.
[SIZE=+0]1. CHEMISTRY[/SIZE]
[SIZE=+0]Chromophore is attached to a protein of 124 kD.[/SIZE]
[SIZE=+0]Phy has two interconvertible states.[/SIZE]
[SIZE=+0]Pr ----RED LIGHT ---> Pfr ---> ---> ----> RESPONSE[/SIZE]
[SIZE=+0] <---FAR RED -------[/SIZE]
[SIZE=+0] <---DARK ----------[/SIZE]
[SIZE=+0]Stable Unstable (Degraded)[/SIZE]
[SIZE=+0]Inact. Active[/SIZE]
[SIZE=+0]2. PHYTOCHROME acts as a light-activated switch.[/SIZE]
[SIZE=+0]A unique trait of phytochrome-regulated response is PHOTOREVERSIBILITY.[/SIZE]
Three kinds of phytochrome responses:
VLF, 1-100 nmol/m[SUP]2[/SUP] Not reversible
LF, 1-100 umol/m[SUP]2[/SUP] Reversible
HIR 10 mmol/m[SUP]2[/SUP] Not reversible
Phytochrome can sense light changes during the day
-photon density (quantity)
- Ratio of Pr/Pfr (quality)
[SIZE=+0]Multiple forms of phytochrome[/SIZE]
Phy A: labile form, present in dark grown seedlings
Phy B, C, D, E: stable form found in green seedlings and plant.
[SIZE=+0]3. How is a light signal transduced to give a response?[/SIZE]
[SIZE=+0]a. Physiology and cell biol. approaches : electrical potential, [Ca] changes[/SIZE]
[SIZE=+0]b. Biochemical approaches: enzyme activity changes[/SIZE]
[SIZE=+0]c. Molecular methods:[/SIZE] changes in gene expression (mRNA)
[SIZE=+0]d. Genetic approach (v. powerful): find mutants that fail to respond to signal
Identify gene product to deduce its role in signaling[/SIZE][SIZE=+0][/SIZE]
[SIZE=+0]Models: mode of Action[/SIZE]
[SIZE=+0]1. Regulate ion transport[/SIZE]
[SIZE=+0]2. Regulate gene expression[/SIZE]
Early response genes
Late response genes
3. Regulate metabolic pathway
4. Change cytoskeleton
[SIZE=+1]II. Blue Light-induced Responses[/SIZE]
1. Responses are triggered by light of 450 nm.
e.g. phototropism, inhibition of hypocotyl elongation, induction of stomatal opening
2. Several blue-light receptors have been identified. Receptors affect different responses.
a. Cryptochrome or Cry1 inhibit stem elongation
b. Cry2 cotyledon expansion, clock, flower induction
c. Nph1 at the PM = Phot1 (phototropin1) phototropism
d. Npl 1= Phot2 chloroplast- high light avoidance
e. Flavin
f. Carotenoids
3. How is a Blue light signal received and transduced? Mode of Action:
Many responses are regulated by both Red and blue light.
1. Signal Perception by a Receptor
2. Second messengers transduce and amplify the signal
3. Final Responses
a. Regulate Activity of a Membrane Transporter:
e.g. H+ pump activated, or Anion channel opens
b. Activation/repression of Gene expression through proteins interacting with light-regulated elements Crytochromes found in the retina of mammals have a role in circadian rhythm.
[SIZE=+0]-Light quality and quantity are the most significant environmental factors affecting plant development.[/SIZE]
[SIZE=+0]-Light induces dramatic changes in morphology and biochemical (protein) composition.[/SIZE]
[SIZE=+0]How does light induce such changes? e.g. increase in rubisco, LHC[/SIZE]
[SIZE=+0]A Simple Model of Signal-induced Responses[/SIZE]
[SIZE=+0]1. Signal perception by a receptor[/SIZE]
[SIZE=+0]2. Signal transduction[/SIZE]
[SIZE=+0] a) Communcate signal to other cell parts[/SIZE]
[SIZE=+0] b) Amplify the signal[/SIZE]
[SIZE=+0] c) Network and cross-talk[/SIZE]
[SIZE=+0]3. Primary response[/SIZE]
a) Increase or decrease in gene expression
[SIZE=+0] b) Change from inactive protein ---> active protein
4. Physiological or cellular response.[/SIZE]
[SIZE=+0]Plants have 3 types of Photoreceptors[/SIZE]
[SIZE=+0]1. Phytochrome 660 /730 nm[/SIZE]
[SIZE=+0]2. Blue light receptor 400-500 nm[/SIZE]
[SIZE=+0]3. UV-B Receptors 260-350 nm[/SIZE]
[SIZE=+0]Phytochrome plays a critical role in every stage of development.[/SIZE]
e.g. seed germination (lettuce)
Different Intensities of light induce different responses
a. Very low fluence (VLF) response :
b. Low fluence (LF) responses
c. High irradiation reactions (HIR)
[SIZE=+1]I. PHYTOCHROME [/SIZE][SIZE=+0]: A red light receptor[/SIZE]
[SIZE=+0]Absorbs in the Red 660 nm, Red induces change[/SIZE]
[SIZE=+0]Absorption in the Far red 730 nm reverses it.[/SIZE]
[SIZE=+0]Red light causes many changes: e.g.[/SIZE]
[SIZE=+0] Seed germination[/SIZE]
[SIZE=+0] Inhibition of stem elongation[/SIZE]
[SIZE=+0] Leaf expansion[/SIZE]
[SIZE=+0]Present in all tissues:[/SIZE]
[SIZE=+0] Roots, Shoots, Leaves[/SIZE]
Phy is found in the nucleus and cytoplasm, and it is not embedded in the membrane.
[SIZE=+0]1. CHEMISTRY[/SIZE]
[SIZE=+0]Chromophore is attached to a protein of 124 kD.[/SIZE]
[SIZE=+0]Phy has two interconvertible states.[/SIZE]
[SIZE=+0]Pr ----RED LIGHT ---> Pfr ---> ---> ----> RESPONSE[/SIZE]
[SIZE=+0] <---FAR RED -------[/SIZE]
[SIZE=+0] <---DARK ----------[/SIZE]
[SIZE=+0]Stable Unstable (Degraded)[/SIZE]
[SIZE=+0]Inact. Active[/SIZE]
[SIZE=+0]2. PHYTOCHROME acts as a light-activated switch.[/SIZE]
[SIZE=+0]A unique trait of phytochrome-regulated response is PHOTOREVERSIBILITY.[/SIZE]
Three kinds of phytochrome responses:
VLF, 1-100 nmol/m[SUP]2[/SUP] Not reversible
LF, 1-100 umol/m[SUP]2[/SUP] Reversible
HIR 10 mmol/m[SUP]2[/SUP] Not reversible
Phytochrome can sense light changes during the day
-photon density (quantity)
- Ratio of Pr/Pfr (quality)
[SIZE=+0]Multiple forms of phytochrome[/SIZE]
Phy A: labile form, present in dark grown seedlings
Phy B, C, D, E: stable form found in green seedlings and plant.
[SIZE=+0]3. How is a light signal transduced to give a response?[/SIZE]
[SIZE=+0]a. Physiology and cell biol. approaches : electrical potential, [Ca] changes[/SIZE]
[SIZE=+0]b. Biochemical approaches: enzyme activity changes[/SIZE]
[SIZE=+0]c. Molecular methods:[/SIZE] changes in gene expression (mRNA)
[SIZE=+0]d. Genetic approach (v. powerful): find mutants that fail to respond to signal
Identify gene product to deduce its role in signaling[/SIZE][SIZE=+0][/SIZE]
[SIZE=+0]Models: mode of Action[/SIZE]
[SIZE=+0]1. Regulate ion transport[/SIZE]
[SIZE=+0]2. Regulate gene expression[/SIZE]
Early response genes
Late response genes
3. Regulate metabolic pathway
4. Change cytoskeleton
[SIZE=+1]II. Blue Light-induced Responses[/SIZE]
1. Responses are triggered by light of 450 nm.
e.g. phototropism, inhibition of hypocotyl elongation, induction of stomatal opening
2. Several blue-light receptors have been identified. Receptors affect different responses.
a. Cryptochrome or Cry1 inhibit stem elongation
b. Cry2 cotyledon expansion, clock, flower induction
c. Nph1 at the PM = Phot1 (phototropin1) phototropism
d. Npl 1= Phot2 chloroplast- high light avoidance
e. Flavin
f. Carotenoids
3. How is a Blue light signal received and transduced? Mode of Action:
Many responses are regulated by both Red and blue light.
1. Signal Perception by a Receptor
2. Second messengers transduce and amplify the signal
3. Final Responses
a. Regulate Activity of a Membrane Transporter:
e.g. H+ pump activated, or Anion channel opens
b. Activation/repression of Gene expression through proteins interacting with light-regulated elements Crytochromes found in the retina of mammals have a role in circadian rhythm.
tikitoker
Active Member
bird mcbride
Well-Known Member
pre-vegging...that must be when the mj plant is still inside the seed
SnapsProvolone
Well-Known Member
Pre-vegging... the very relevant and often misunderstood act of getting really high before transformng into a couch potato lying on the sofa watching a movie with snacks.
