enough of the school boy shiat……get back to da kin…..
ganj on…..
ganj on…..
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Tom Hill Haze
- Thread starter Morphote
- Start date
hey bro ..these are basically the same thing..
he said broad you said fat..
Mexico has lots of "larger than skinny" leaf sativas ..so does Colombia
and they both have skinny leaf
..this back and forth has gone on long enough?
its called Sativa L
hey Tomster
if you are watching....I know my dough arrived
I know things will workout..
been smoking 2 x two year old madmac ohz s1 plants..
In retrospect I shoulda kept the cuts I made because the weed has grown on me
“pearly" is good weed
the fatter one[not fat] gave me serious
"I can do anything "vibes
[thanks mad Mac]
I await my seeds from Tom so I can do the world and me justice..
" c’est la plan"
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sometimes on here ,
with just conversation , we can be talking about the same thing without knowing ,
and still disagreeing ,
thats where pictures are great , they allow the ability to confirm things ,, so we know we are on the same page ,
i think its likely thats the case with the conversation i was having earlier ,
except old mate doesnt seem to have any pictures to confirm it ,
he just wants to disagree ,
ive had a conversation with him before and he was the same way then too ,
some folks just like to make a deal out of disagreeing, and being right ,
there is no middle ground to be had ,
thats where we got to with the second conversation i had with that chap ,
and i wont be entering into a third one since i have much better things to do ..
the typical thing is when someone makes a statement based on study and experience,
with good explanation and a few pictures to go with it ,
the person disagreeing would do so an also back it up with some study and pictures of their own ,
then we may find that common ground and actually, both learn something, its a friendly way of doing it , since we are all on the same team ,
but some folks like to be separate and for want of a better word ,, be smart asses , without anything to back it up , those folks are to be avoided , they dont know how to have good conversation and share information that can enlighten us all ...
and thats about all i have to say on the matter , for me its closed and ill be crossing that chap off my list of people to engage with ...
Here's a good read
The influence of leaf size and shape on leaf thermal dynamics: does the theory hold up under natural conditions?
Laboratory studies on artificial leaves suggest that leaf thermal dynamics are strongly influenced by the two-dimensional size and shape of leaves and associated boundary layer thickness.
Hot environments are therefore said to favour selection for small, narrow or dissected leaves
The influence of leaf size and shape on leaf thermal dynamics: does the theory hold up under natural conditions?
Laboratory studies on artificial leaves suggest that leaf thermal dynamics are strongly influenced by the two-dimensional size and shape of leaves and associated boundary layer thickness.
Hot environments are therefore said to favour selection for small, narrow or dissected leaves
Thanks for putting that up Hammer,
The nay sayers have no idea about botany as it makes total sense why plants have broad or thin leaf.
Plus I looked back about 10 pages and one of the nay sayers put up a picture of a Colombian grow which was so obviously hybrids and not pure sativa but he doesn't have enough knowledge or experience to see it.
ICGA
Active member
Thick like a succulent to distinguish from broad as in wide fingered. I agree they are thicker but IMO that would be an addaption to low humidity. As it would cause there to be more tissue to store water in. Thin leaves help tall plants not get destroyed by wind is another reason that I'm they should have an advantage. Where as short plants with a short season need broad leaves to help grow as fast as possible in the early part of the year. This is also why leaves get thiner later in the season.
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ICGA
Active member
He just preserved it with open polenation not selection. Because the desirable traits in haze are segregating in a way that makes it difficult to lock down in an IBL. He sed neither he or Sam the skunk man had any luck with stabilizing it. It's just a numbers game, it would take more then just filail breeding to stabilize it, and how would you tell where to start if you haven't grown the original parents. Not impossible but it would take many years and an absurd number of plants.
Brother Nature
Well-known member
Thin/thick, fat/skinny leaf theory sounds similar to Thompsons Nose rule in anthropology, no reason why the same logic wouldn't apply to other species.
www.reuters.com
But, that's not what the thread is really about. Has anyone whose received these recent hundy packs started a journal yet? I think everyone who has received should start a journal, that way we can all tell you what's what with your grow...
Breathe easy: nose shape was influenced by local climate
The human nose, in all its glorious forms, is one of our most distinctive characteristics, whether big, little, broad, narrow or somewhere in between. Scientists are now sniffing out some of the factors that drove the evolution of the human proboscis.
www.reuters.com
But, that's not what the thread is really about. Has anyone whose received these recent hundy packs started a journal yet? I think everyone who has received should start a journal, that way we can all tell you what's what with your grow...
sbeanonnamellow
Well-known member
I think it's more than just humidity, though that's a significant factor. Leaf morphology is influenced mostly by light and water availability. In compound leaves, variations of leaflet dimension should take the whole compound leaf into account. Not just the slenderness of it's leaflets. It's said that the anatomy of a leaf has everything to do with achieving the balance between photosynthesis and water loss in the environment in which the plant grows. That includes how night time temperatures relate as well. For example, the same cutting grown in the same daytime conditions but with drastically different night time temps will likely have different leaf morphologies expressing to show the climatic variability and adaptability of a given genome. As Wally mentioned earlier, it depends on the genes too. How long they've had to acclimate to a given region. If the genetics are even capable of providing the variability needed to adapt. Some stuff is just too far gone and selected away from.
It's said that plants in humid tropical climates favor broad leaves as they're able to sacrifice water as a tradeoff for cooling via transpiration. Not broad leaflets but broad leaves. I think it's important to make a distinction of the leaf as a whole system including it's leaflets. Cannabis has such complex leaf structures even the grooves in the petioles are of significance to balancing the aforementioned photosynthesis and water availability. To me, all cannabis is broadleaf. Some have varying degrees of thinness or broadness to their leaflets, but when viewing the leaf as a whole how are they not all broad leaves? Genuinely asking. Much love
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ICGA
Active member
In cannabis they are generally referring to leaflets not the whole leaf. Tropical cannabis plants have giant fan leaves but in cannabis they always have narrow fingers aka leaflets.
windmills
Well-known member
A New Study Overturns A Classic Textbook Theory
A new study overturns a classic textbook theory.
Previously, the textbook theory explained leaf size variability in terms of available water and the risk of overheating. In those places with high rainfall, such as in the tropics, leaves grow larger while small-leaved plants flourish in arid and high altitude environments. However, this explanation does not capture the entire complexity of leaf size variability.
Instead, the authors reported in the journal Science that:
This neat map put together by the researchers shows that as we move to areas with higher average annual temperatures, average leaf size increases.
Why leaves come in so many different sizes, explained by new study
A new study overturns a classic textbook theory.
Previously, the textbook theory explained leaf size variability in terms of available water and the risk of overheating. In those places with high rainfall, such as in the tropics, leaves grow larger while small-leaved plants flourish in arid and high altitude environments. However, this explanation does not capture the entire complexity of leaf size variability.
Instead, the authors reported in the journal Science that:
- daytime temperatures place an upper boundary on leaf size for plants growing in arid environments since optimal transpiration is not possible when water supply is limited;
- in wet environments, however, its night-time temperatures that constrain leaf growth to achieve effective transpirational cooling;
- in both wet and warm environments, such as the tropics, there seem to be no thermal constraints. Instead, physical limits likely impose a maximum leaf size.
This neat map put together by the researchers shows that as we move to areas with higher average annual temperatures, average leaf size increases.
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sbeanonnamellow
Well-known member
I'm under the assumption that leaves are large with long slender distinctly serrated leaflets in the tropics because that's the most efficient way to balance the light and water availability.
The large leaves in total surface area with long slender heavily serrated leaflets in tropical cannabis help provide means to operate at a higher operative temperature than leafs with shorter broader leaflets and more rounded serrations. As a leaf structure lengthens the boundary layer gets thicker and effectively forces the plant to find equilibrium at a higher relative temperature. Great for the tropics. The boundary layer is thinnest at the leafs leading edge so having more distinct serrations and longer thinner multifingered sharply pointed leaves provide the plant with a better system for self regulation in the tropics by increasing it's total leaf edge.
Plants in the tropics have plenty of light and water. They typically grow much larger and with much more branching than plants acclimated to more temperate regions. Another reason for the thinner leaflets could be so they don't block out the lower portions of the plant as they grow to these large sizes. I'd say that's why Wally's plant shows the fatter leaves when it's still a smaller younger plant and as it grows larger with more biomass the morphology starts to change into the thinner leaflets. It could even be to help shed frequent heavy rainfall. Selection is important.
Not all plants are going to be so kind as to perform so well. Having the proper genetics to shine in a given environment is quite important. Much love
The large leaves in total surface area with long slender heavily serrated leaflets in tropical cannabis help provide means to operate at a higher operative temperature than leafs with shorter broader leaflets and more rounded serrations. As a leaf structure lengthens the boundary layer gets thicker and effectively forces the plant to find equilibrium at a higher relative temperature. Great for the tropics. The boundary layer is thinnest at the leafs leading edge so having more distinct serrations and longer thinner multifingered sharply pointed leaves provide the plant with a better system for self regulation in the tropics by increasing it's total leaf edge.
Plants in the tropics have plenty of light and water. They typically grow much larger and with much more branching than plants acclimated to more temperate regions. Another reason for the thinner leaflets could be so they don't block out the lower portions of the plant as they grow to these large sizes. I'd say that's why Wally's plant shows the fatter leaves when it's still a smaller younger plant and as it grows larger with more biomass the morphology starts to change into the thinner leaflets. It could even be to help shed frequent heavy rainfall. Selection is important.
Not all plants are going to be so kind as to perform so well. Having the proper genetics to shine in a given environment is quite important. Much love
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The link I posted above has many references with 132 citings to look through.. There's a lot of supporting data in that link..Scroll to the bottom to find them.
Study reveals a mechanism that plants can use to dissipate excess sunlight as heat. In a new study, Schlau-Cohen and colleagues at MIT, the University of Pavia, and the University of Verona directly observed, for the first time, one of the possible mechanisms that have been proposed for how plants dissipate energy. The researchers used a highly sensitive type of spectroscopy to determine that excess energy is transferred from chlorophyll, the pigment that gives leaves their green color, to other pigments called carotenoids, which can then release the energy as heat.
news.mit.edu
Here's another one.
www.mdpi.com
Study reveals a mechanism that plants can use to dissipate excess sunlight as heat. In a new study, Schlau-Cohen and colleagues at MIT, the University of Pavia, and the University of Verona directly observed, for the first time, one of the possible mechanisms that have been proposed for how plants dissipate energy. The researchers used a highly sensitive type of spectroscopy to determine that excess energy is transferred from chlorophyll, the pigment that gives leaves their green color, to other pigments called carotenoids, which can then release the energy as heat.
How plants protect themselves from sun damage
MIT chemists have observed, for the first time, one of the possible mechanisms that have been proposed for how plants dissipate energy when they are exposed to excess sunlight.
news.mit.edu
Here's another one.
Biomimetic Groundwork for Thermal Exchange Structures Inspired by Plant Leaf Design
Geometry is a determining factor for thermal performance in both biological and technical systems. While biology has inspired thermal design before, biomimetic translation of leaf morphology into structural aspects of heat exchangers remains largely unaddressed. One determinant of plant thermal...
www.mdpi.com
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nice looking male there amigo…..
ganj on…
ganj on…
