Cannabis sativa - Revision history

Adm1n at 18:48, 23 February 2015

2015-02-23T18:48:40Z

Adm1n at 18:48, 23 February 2015

2015-02-23T18:48:24Z

Adm1n: /* Cultivars */

2015-01-29T21:15:39Z

‎Cultivars

Adm1n at 21:15, 29 January 2015

2015-01-29T21:15:03Z

Adm1n: Created page with "Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded hi..."

2015-01-24T14:34:47Z

Created page with "Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded hi..."

New page

Cannabis sativa is an annual herbaceous plant in the [[Cannabis]] genus, a species of the [[Cannabaceae]] family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.

'''Common uses'''

Its seeds are chiefly used to make hempseed oil which can be used for cooking, lamps, lacquers, or paints. They can also be used as caged-bird feed, as they provide a moderate source of nutrients for most birds. The flowers (and to a lesser extent the leaves, stems, and seeds) contain psychoactive chemical compounds known as [[cannabinoids]] that are consumed for recreational, medicinal, and spiritual purposes. When so used, preparations of flowers ([[marijuana]]) and leaves and preparations derived from resinous extract (e.g.[[hashish]]) are consumed by smoking, vaporizing and oral ingestion. Historically, tinctures, teas, and ointments have also been common preparations. In traditional medicine of India in particular C. sativa has been used as hallucinogenic, hypnotic, sedative, analgesic, and anti-inflammatory agent.

'''Plant physiology'''

The flowers of the female plant are arranged in racemes and can produce hundreds of seeds. Male plants shed their pollen and die several weeks prior to seed ripening on the female plants. Although genetic factors dispose a plant to become male or female, environmental factors including the diurnal light cycle can alter sexual expression. Naturally occurring monoecious plants, with both male and female parts, are either sterile or fertile but artificially induced "hermaphrodites" (a commonly used misnomer) can have fully functional reproductive organs. "Feminized" seed sold by many commercial seed suppliers are derived from artificially "hermaphrodytic" females that lack the male gene, or by treating the plants with hormones or silver thiosulfate. In the case of production related to recreational use of [[Cannabis]], the process of "cloning" provides the grower with DNA identical female plants eliminating the need of seeds for the growing process.

A Cannabis plant in the vegetative growth phase of its life requires more than 12–13 hours of light per day to stay vegetative. Flowering usually occurs when darkness equals at least 12 hours per day. The flowering cycle can last anywhere between nine to fifteen weeks, depending on the strain and environmental conditions.

In soil, the optimum pH for the plant is 6.3 to 6.8. In hydroponic growing, the nutrient solution is best at 5.2 to 5.8, making Cannabis well-suited to hydroponics because this pH range is hostile to most bacteria and fungi.

Cultivars
Broadly, there are three main cultivar groups of cannabis that are cultivated today:

Cultivars primarily cultivated for their fibre, characterised by long stems and little branching.
Cultivars grown for seed which can be eaten entirely raw or from which [[hemp oil]] is extracted.
Cultivars grown for medicinal or recreational purposes. A nominal if not legal distinction is often made between industrial hemp, with concentrations of psychoactive compounds far too low to be useful for that purpose, and [[marijuana]].

'''Pharmacology'''

Δ9-[[tetrahydrocannabinol]] (THC)

Although the main psychoactive constituent of Cannabis is [[tetrahydrocannabinol]] (THC), the plant is known to contain about sixty [[cannabinoids]]; however, most of these "minor" cannabinoids are only produced in trace amounts. Besides THC, another cannabinoid produced in high concentrations by some plants is [[cannabidiol]] (CBD), which is not psychoactive but has recently been shown to block the effect of THC in the nervous system. Differences in the chemical composition of Cannabis varieties may produce different effects in humans. Synthetic THC, called dronabinol, does not contain [[CBD]], [[CBN]], or other cannabinoids, which is one reason why its pharmacological effects may differ significantly from those of natural Cannabis preparations.

'''Chemical constituents'''
Cannabis chemical constituents include about 100 compounds responsible for its characteristic aroma. These are mainly volatile terpenes and sesquiterpenes.

[[Tetrahydrocannabinol]] (THC)
[[Cannabidiol]] (CBD)
α-Pinene
Myrcene
Linalool
Limonene
Trans-β-ocimene
α-Terpinolene
Trans-caryophyllene
α-Humulene, contributes to the characteristic aroma of Cannabis sativa
Caryophyllene-oxide, with which some hashish detection dogs are trained

'''Difference between C. indica and C. sativa'''

Cannabis sativa has a higher level of THC compared to CBD, while Cannabis indica has a higher level of CBD compared to THC. Cannabis strains with relatively high CBD:THC ratios are less likely to induce anxiety than vice versa. This may be due to CBD's antagonistic effects at the [[cannabinoid receptors]], compared to [[THC]]'s partial agonist effect. [[CBD]] is also a 5-HT1A receptor (serotonin) agonist, which may also contribute to an anxiolytic-content effect. This likely means the high concentrations of CBD found in Cannabis indica mitigate the anxiogenic effect of THC significantly. The effects of sativa are well known for its cerebral high, while indica is well known for its sedative effects which some prefer for night time use. Both types are used as [[medical cannabis]]. Indica plants are normally shorter and stockier than sativas. They have wide, deeply serrated leaves and a compact and dense flower cluster. The effects of indicas are predominantly physical and sedative.

@@ Line 1: / Line 1: @@
 Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.
-[[File:Cannabis sativa - Weed Depot.jpg|200px|thumb|left|type of strain of cannabis]]
+[[File:Cannabis sativa - Weed Depot.jpg|200px|thumb|left|specific strain of cannabis]]
 == Common uses ==

← Older revision		Revision as of 18:48, 23 February 2015
Line 1:		Line 1:
	Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.		Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.

		+	[[File:Cannabis sativa - Weed Depot.jpg\|200px\|thumb\|left\|type of strain of cannabis]]

	== Common uses ==		== Common uses ==

@@ Line 28: / Line 28: @@
 Cultivars primarily cultivated for their fibre, characterised by long stems and little branching.
 Cultivars grown for seed which can be eaten entirely raw or from which hemp oil is extracted.
 Cultivars grown for medicinal or recreational purposes. A nominal if not legal distinction is often made between industrial hemp, with concentrations of psychoactive compounds far too low to be useful for that purpose, and marijuana.
 == Pharmacology ==

@@ Line 1: / Line 1: @@
-Cannabis sativa is an annual herbaceous plant in the [[Cannabis]] genus, a species of the [[Cannabaceae]] family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.
+Cannabis sativa is an annual herbaceous plant in the Cannabis genus, a species of the Cannabaceae family. People have cultivated Cannabis sativa throughout recorded history as a source of industrial fibre, seed oil, food, recreation, religious and spiritual moods, and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carolus Linnaeus in 1753.
-Its seeds are chiefly used to make hempseed oil which can be used for cooking, lamps, lacquers, or paints. They can also be used as caged-bird feed, as they provide a moderate source of nutrients for most birds. The flowers (and to a lesser extent the leaves, stems, and seeds) contain psychoactive chemical compounds known as [[cannabinoids]] that are consumed for recreational, medicinal, and spiritual purposes. When so used, preparations of flowers ([[marijuana]]) and leaves and preparations derived from resinous extract (e.g.[[hashish]]) are consumed by smoking, vaporizing and oral ingestion. Historically, tinctures, teas, and ointments have also been common preparations. In traditional medicine of India in particular C. sativa has been used as hallucinogenic, hypnotic, sedative, analgesic, and anti-inflammatory agent.
+== Common uses ==
-'''Plant physiology'''
+Main articles: [[Industrial and personal uses of Cannabis]], [[Cannabis (drug)]] and [[Hemp]]
 A Cannabis plant in the vegetative growth phase of its life requires more than 12–13 hours of light per day to stay vegetative. Flowering usually occurs when darkness equals at least 12 hours per day. The flowering cycle can last anywhere between nine to fifteen weeks, depending on the strain and environmental conditions.
 In soil, the optimum pH for the plant is 6.3 to 6.8. In hydroponic growing, the nutrient solution is best at 5.2 to 5.8, making Cannabis well-suited to hydroponics because this pH range is hostile to most bacteria and fungi.
 Cultivars
 Broadly, there are three main cultivar groups of cannabis that are cultivated today:
 Cultivars primarily cultivated for their fibre, characterised by long stems and little branching.
-Δ9-[[tetrahydrocannabinol]] (THC)
+Cultivars grown for medicinal or recreational purposes. A nominal if not legal distinction is often made between industrial hemp, with concentrations of psychoactive compounds far too low to be useful for that purpose, and marijuana.
-'''Chemical constituents'''
+== Pharmacology ==
 Cannabis chemical constituents include about 100 compounds responsible for its characteristic aroma. These are mainly volatile terpenes and sesquiterpenes.
-[[Tetrahydrocannabinol]] (THC)
-[[Cannabidiol]] (CBD)
+Tetrahydrocannabinol (THC)
 α-Pinene
 Myrcene
 Linalool
 Limonene
 Trans-β-ocimene
 α-Terpinolene
 Trans-caryophyllene
 α-Humulene, contributes to the characteristic aroma of Cannabis sativa
 Caryophyllene-oxide, with which some hashish detection dogs are trained
-Cannabis sativa has a higher level of THC compared to CBD, while Cannabis indica has a higher level of CBD compared to THC. Cannabis strains with relatively high CBD:THC ratios are less likely to induce anxiety than vice versa. This may be due to CBD's antagonistic effects at the [[cannabinoid receptors]], compared to [[THC]]'s partial agonist effect. [[CBD]] is also a 5-HT1A receptor (serotonin) agonist, which may also contribute to an anxiolytic-content effect. This likely means the high concentrations of CBD found in Cannabis indica mitigate the anxiogenic effect of THC significantly. The effects of sativa are well known for its cerebral high, while indica is well known for its sedative effects which some prefer for night time use. Both types are used as [[medical cannabis]]. Indica plants are normally shorter and stockier than sativas. They have wide, deeply serrated leaves and a compact and dense flower cluster. The effects of indicas are predominantly physical and sedative.
+== Difference between C. indica and C. sativa ==