a MH puts out vital UV rays
trichomes are said to be made to protect th eplant form such harmful rays many poeple swithch it for the last week and is ment to greatly boost trichome production
do abit more research, but the basic idea is about the UV rays
I see the same position stated from time to time but I always wonder if anyone who says it ever really thinks it through or not?
Have you ever watched closely as plants grow? Have you noticed how slowly trichomes develop and spread to cover buds and smaller leaves etc.?
How many new trichomes do you honestly believe will grow and produce much THC and other cannabinoids in only one week, the final week of flowering? You are more apt to seen increased size of existing trichome-heads than many new trichomes filled with THC and other cannabinoids in such a short period of time.
If someone wants to use dual spectrum lighting that's cool and the gang but only using it in the last week of flowering is a case of too little too late to make a significant difference. Instead they should run multiple lights or if they use a wattage where a dual spectrum bulb can be used they should take that route. You can purchase a 1000-watt bulb that has a 600-watt HPS and a 400-watt MH filament so you will have both HPS and MH, or in the 600-watt it is an even split of 300-watts of both HPS and MH.
Still using MH, or any other form of lighting that adds more UV rays, will reduce yields so the adding additional UV lighting is something of a double edged sword. Going straight MH would reduce yields even more than just adding MH or some other form of lighting that would increase UV light rays.
I always get a kick out of growers that go all Lady Gaga over massive trichome coverage thinking that alone means quality and potency when it actually doesn't. Not all trichomes produce THC and not all trichomes that do produce THC and other cannabinoids do so in equal amounts or of equal potency.
A plant that is covered from top to bottom in thick frosty trichomes could turn out to be far less potent than another plant that doesn't have anywhere near as thick and wide of trichome coverage. It all depends on the plant's genetics that will decide the potency.
People wrongly assume that more trichomes always means more potent but while men were all created equal, trichomes were not.
It is less a case of trichome numbers and instead a matter of genetics that dictates potency. I have grown many pure sativa strains in my life that when compared to an indica looked almost void of trichomes, but the sativas with FAR less trichome coverage and smaller trichomes were VASTLY more potent.
Genetics are everything, period, thee end. The very most the very best grower in the world with the very best growing conditions could EVER do is maximize the genetic potential of what they are growing, and that is the VERY MOST and the VERY BEST they could ever do. Anyone with lesser skills and lesser conditions will not achieve that.
In the end it all comes down to being able to tickle out of a strain all it has to offer, but no one will ever be able to manipulate a plant's growth in a way that will take it beyond its genetic limits in any way.
Nothing any grower will ever be able to do will result in their results being better than the plant is genetically coded for. The very best any grower can do is to keep their plants from being less than they could otherwise be .... and many fail to do that to some point on a regular basis but if they stick to quality genetics their results will still be more than pleasing to them in the end.
Inside the Trichome
By Bubbleman and Jeremiah Vandermeer, Cannabis Culture - Thursday, June 11 2009
CANNABIS CULTURE -
An up-close look at the THC-producing resin glands of the cannabis plant through pot-ographer Bubbleman's macro lens.
If you’ve seen pictures of mature cannabis plants taken with a macroscopic lens that’s zoomed-in very close, then you’ve undoubtedly noticed the many glistening translucent resin glands protruding from the buds, leaves, and just about everywhere else on the plant (see “Stalking Trichomes”, CC #72). Most marijuana growers and readers of pot magazines are quite familiar – and some downright obsessed – with these resinous outgrowths known as trichomes. You may have also read that the sticky coating of trichomes is home to the active ingredients in cannabis – the stuff that gets you high and has all the medical benefits – tetrahydrocannabinol (THC), cannabidiol (CBD), and other cannabinoids. But have you ever wondered exactly what the trichomes do for the cannabis plant, or what biological purpose they serve?
Sticky resinous growths knows as trichomes are home to the active ingredients in cannabis. (Click picture to enlarge)
Evolution of Trichomes
In nature, only the strong survive, and it is hypothesized by biologists that trichomes evolved as a defense mechanism of the cannabis plant against a range of potential enemies (1). Trichomes, from the Greek meaning ‘growth of hair,’ act as an evolutionary shield, protecting the plant and its seeds from the dangers of its environment, allowing it to reproduce. These adhesive sprouts form a protective layer against offensive insects, preventing them from reaching the surface of the plant. The chemicals in the trichomes make cannabis less palatable to hungry animals and can inhibit the growth of some types of fungus. The resin also helps to insulate the plant from high wind and low humidity, and acts as a natural ‘sun-screen’ in protecting against UV-B light rays. But since trichomes contain euphoric properties attractive to humans, it may be man who has had the most influence on the plants’ development through many years of favoring strains that consistently produce more of these gooey resin heads.
Trichome Types
Trichomes grow in numerous shapes and sizes on many types of plants. The cannabis plant has developed three main types (from NationMaster Encyclopedia):
Bulbous: This type is the smallest (15 to 30 micrometers). From one to four cells make up the ‘foot’ and ‘stalk’, and one to four cells make up the ‘head’ of the gland. Head cells secrete a resin, presumably cannabinoids, and related compounds that accumulate between the head cells and the cuticle. When the gland matures, a nipple-like protrusion may form on the membrane from the pressure of accumulating resin. The bulbous glands are found scattered about the surfaces of the aboveground plant parts. [Pictured below.]
Capitate-Sessile: The second type of gland is larger (25 to 100 micrometers) and more numerous than the bulbous glands. They are called capitate, which means having a globular-shaped head. On immature plants, the heads lie flush, appearing not to have a stalk and are called capitate sessile. They have a stalk that is one cell high, although it may not be visible beneath the globular head. The head is composed of usually eight, but up to 16 cells, that form a convex rosette. These cells secrete cannabinoids and related compounds that accumulate between the rosette and its outer membrane. This gives it a spherical shape.
Capitate-Stalked: Cannabinoids are most abundant in the capitate-stalked glands, which consists of a tier of secretory disc cells subtending a large non-cellular secretory cavity. During flowering, the capitate glands that appear on the newly formed plant parts take on a third form. Some of the glands are raised to a height of 150 to 500 micrometres when their stalks elongate. These capitate-stalked glands appear during flowering and form their densest cover on the female flower bracts [specialized leaves that cover the seeds]. They are also highly concentrated on the small leaves that accompany the flowers. The male flowers have some stalked glands, but they are smaller and less concentrated than on the female. (2)
Cannabinoids
Cannabinoids are a group of chemical compounds that occur naturally in the cannabis plant, first discovered in the 1940s. When consumed by humans, the chemicals bind to CB1 and CB2 cannabinoid receptors in the brain and body, causing euphoria and other effects. The broader definition includes three general types: phytocannabinoids, which occur uniquely in the cannabis plant; endogenous cannabinoids, produced by the bodies of humans and other mammals, birds, fish, and reptiles; and synthetic cannabinoids, which are related compounds produced in laboratories. Cannabinoids present in the cannabis plant include THC, CBD, cannabinol (CBN), cannabichromene (CBC), cannabigerol (CBG), and tetrahydrocannabivarin (THCV).
Inside the Trichome
THC and other cannabinoids are produced in only one place on the cannabis plant: inside the heads of the trichomes. How it happens: Organelles produced by the plant called Vacuoles – which contain phenols, a chemical compound similar to alcohol [pictured at right in
blue], and another type of organelle called plastids – containing hydrocarbons called terpenes [
red], make their way up the trichome stalk [
green] and combine inside the secretory cavity into a fibrous mat [
yellow]. This concentrated mat is hit by UV-B light waves, causing the creation of cannabinoids. Since all of the psychoactive ingredients are produced inside the trichome, these tiny resin hairs have long been sought after by hash and oil makers and can be separated from the plant and harvested in a variety of ways (3).
Potency and Tricomes
Many media outlets and politicians say the ‘potency’ of today’s pot has increased dramatically in the last 30 years, claiming it contains anywhere from 10%-40% THC. Most are dubious claims, as it is quite obvious that a sample of herbal plant material does not consist of nearly half THC, but there is still much debate on the issue of potency classification.
One thing is for sure; heavy trichome production does not necessarily mean higher potency, because the resins inside the trichome may or may not contain high levels of THC and other active ingredients.
Some speculate that the percentage levels refer to the amount of THC in the oils produced inside the resin glands, but new studies show that cannabinoids other than THC also have distinctive effects on brain functions and cause correspondingly different effects on human cognition and psychiatric symptoms (4).
This makes gauging the ‘potency’ or ‘strength’ of cannabis plants very difficult, as different cannabinoid level combinations may induce different types of highs.
