Origins of the Single Bladed Leaf Pattern?

[D.S. Toker. MD]

Ive revegged plants a couple of times that had already gone into flower and the result was a single bladed leaf structure that usually returned to normal leaf growth after cuttings reached the forth or fith node, but ive grown several strains that showed this single bladed structure in plants grown from seed.

Is this single bladed structure a natural form of leaf structure for cannabis, or is it the result of something humans have done?

 

[THC123]

plants start out with 1 then 3 then 5 then 7 etc.......

 

[D.S. Toker. MD]

Nope, thats not what im talking about. Of course the first pair of leaves are single, but i mean a continuation of that patern beyond the second set of seedling leaves.

Ive seen the pattern in a pheno of Greenhouses White widow and Federations Mikado also demonstrated the leaf pattern. It will happen anytime a flowering plant is cloned and revegged.

 

[THC123]

it's a sign of stress , plants tries to "reset" itself

 

[JackTheGrower]

I too see the single blade at reveg or into flower.. My guess is the single is how flowers form?

I had one clone reveg and develop round single leaves. It grew over a foot tall. It looked nothing like weed. I had it outside where all could see until it decided to grow out with 3 blades.. But for a while.. I thought I had magic stealth weed! Well it still smelled like weed.. No way around that.

 

[burningfire]

yeah, that's normal if it had flowered, through veg, it's normal to see a few nodes with 3 leaves before it goes up to 5, but it's not uncommon for single leaflets in flowering

 

[3dDream]

edit: are you talking fingers or serration? Ignore my post if you meant fingers:

I've wondered if this applies to weed.... this is from a NOVA episode where they use plants to get an idea of the weather.... so no serrations means the plant wants to conserve water. This makes sense if you are revegging. When I see no serrations in a flowering plant I think "i am closer to a tropical expression".

NARRATOR: Spicer believes that these serrations evolved to help plants circulate water and nutrients. In hot climates, moisture evaporates from leaves, causing water to rise up through the roots. But if the temperature drops, evaporation and circulation ceases.

ROBERT SPICER: Now, in those situations, the plant can't evaporate water from the leaf, so it can't suck water out from the ground. And, of course, the plant needs the fluid going through the plant body to move nutrients.

NARRATOR: But the serrations in leaves growing in cool climates solve that problem because at the tip of each tooth is a small gland that aids circulation.

ROBERT SPICER: So in a cool environment, the plant actually pumps water out through the teeth.

NARRATOR: The real breakthrough came when Spicer realized that he might be able to pinpoint the temperature of the Late Cretaceous using his fossils.

ROBERT SPICER: It's the proportion of tooth leaves and non-tooth leaves that we see in a particular place, living today or in a fossil assemblage, that gives us an idea of the relative warmth, the average annual temperature during the year.

NARRATOR: He and his team spent years comparing leaf shapes to climate data in more than 170 locations around the world. It was a massive undertaking. But in the end, he was able to create a statistical model that ties leaf-tooth patterns to temperature.

ROBERT SPICER: We can tell what the average annual temperature was, at a given place, to within plus or minus one or two degrees Celsius, which is, when you actually look at it in detail...is about as precise as many modern day meteorological observations are.

NARRATOR: When Spicer examined his fossil collection, he discovered a match between those ancient arctic leaves and leaves found today in Southern Alaska, a temperate climate, very different from the barren tundra today. The model indicated that the average annual temperature on the North Slope was about 42-degrees Fahrenheit, 30 degrees warmer than it is there today. But that number is deceptive because at high latitude, the yearly highs and lows are far apart.

 

[Spangli]

it's a sign of stress , plants tries to "reset" itself

Or it can be a sign of bottlenecked inbred lines.

 

[ThePizzaMan]

The single leaf is a sign of reveg. You prob. took the cutting from a flowering plant, vegged it...and then flowered it.


It really screws with the plant, and you will get the one leaf pattern for quite some time.

 

[SmokyMtnToker]

I think it is a genetic thing...I have had a few do this...single leafs..usually it goes away and more develop..but they are not usually the best plants. When people interbreed so much, as in our thing, weird shit will happen.

 

[Freedom Fighter]

i read a few years back about a substrain of Mikado that consistantly had one blade per leaf... the guy grew them indoor under floros from seed (i think) -- so that rules out the cutting/reveg stressing into single blade.

i've seen pics of the occasion pheno of different breeds that grow with one long blade and a tiny nub blade on each side, doesn't really look like ganja....

if anybody has any seeds of weird looking strains let me know

 

[noreason]

Never seen a ''one blade leaf'' plant...but I saw this ducksfoot on s.boo time ago and I was wondering if it's really a stealth plant due to its strange leaves pattern.

https://www.seedboutique.com/store/product_info.php?products_id=354

And I wonder if with some kind of work on a strain could bring to modify leaf pattern.Not genetic manipulation,I mean.

Interesting thread this

 

[mathias]

here some "one blade leaf " (i think because no enought sun ... )

 

[DocLeaf]

Ive revegged plants a couple of times that had already gone into flower and the result was a single bladed leaf structure that usually returned to normal leaf growth after cuttings reached the forth or fith node, but ive grown several strains that showed this single bladed structure in plants grown from seed.

Is this single bladed structure a natural form of leaf structure for cannabis, or is it the result of something humans have done?

It is a mutation,, the re-veg,, holds the most relevance here,, also very common in abused clones,,

,, but once grown out they usually revert to form,, Afghan throw out the fat leaf again and the sativa start to develop sturdy alternate nodes.. unless they are seriously twisted (mutated/infected)... in which case they usually remain mashed up in flower also!

It's NOT a genetic trait so to speak,, its phenotypical (environmental effect over genotype) ,, and is more prevalent in sativa species IME ,, those that have been subjected to stress or mistreatment,, in one form or another.

Hope this helps

 

[JackTheGrower]

Never seen a ''one blade leaf'' plant...but I saw this ducksfoot on s.boo time ago and I was wondering if it's really a stealth plant due to its strange leaves pattern.

https://www.seedboutique.com/store/product_info.php?products_id=354

And I wonder if with some kind of work on a strain could bring to modify leaf pattern.Not genetic manipulation,I mean.

Interesting thread this

I'll look and see if I can find those shots. It's a cheat really with the reveg but if I took good pictures it will be a nice picture to muse a moment.

I was looking for the rest of the shots but I have thousands. Sorry.. I pulled this one from photos already uploaded.

 

[noreason]

one more one blade leaf plant :

http://www.icmag.com/ic/showpost.php?p=3137577&postcount=26

and here an interesting thread about freaks:

http://www.icmag.com/ic/showthread.php?p=3365147#post3365147

ehi mathias what strain is that?an equatorial sativa?

 

[DocLeaf]

Never seen a ''one blade leaf'' plant...

Oaxacan IBL (c.1977 seeds),, messed up plant,, threw 1s, 3s and skinny 5s :

.. composted!

 

[WelderDan]

I see single leaflets on plants once they go into full flower fairly often. I've re-vegged plants and had them shoot single leaflets for a while, then 3's and then back to 5's, then back to single blades once they bloom again.

And a lot of times the single leaflets have no serrations.

On another note, I topped a few plants last week and the new growth on one has very little to no serrations. Weird.

 

[gdtrfb]

not much to add, just have a decent example of a cut taken after flowering being a single bladed mess, and it recuperating as it vegged

after about 4 weeks

the single bladed leaves didn't survive long after it took off in regular vegetative growth, but that's likely more indicative of the older growth getting canopied over than anything else

 

[D.S. Toker. MD]

That is one ugly, dysfunctional oxacan plant. Is that thing alive? Add in a pair of tits and we'll submitt it to the smithsonian.

The single leaf is a sign of reveg. You prob. took the cutting from a flowering plant, vegged it...and then flowered it.


It really screws with the plant, and you will get the one leaf pattern for quite some time.

... But this doesnt explain the appearance of a single leaf structure in seed grown plants. As i stated earlier, Greenhouse White widow and Federations' Mikado are just 2 strains that exhibit this trait. Wonder why ?