Medicinal plants are recognized as major source of therapeutics, throughout human history to fight illness and maintain health. The usage of natural product in treatment of diseases has been increased because of its natural source and comparatively lesser side effects as compared to the complexity in formulating chemical based drugs, as well as uprising cost has led worldwide researchers to focus on the medicinal plant research. The plant extracts possess medicinal properties and are often used as sweetening agent, colouring agent, preservatives in many medicinal formulations.1 India has a rich diversity of medicinal as well as aromatic plants and holds a unique place in the world in the traditional system of medicine thus called medicinal Garden of the world. India is one of the twelve mega biodiversity center having over 45000 plant species.2 Pinus is the most common genus of the family Pinaceae, which in turn is the largest family within the coniferous. It is a large genus with over 110 species worldwide.3 The genus is divided into two subgenera: Strobus (Haploxylon, soft pines) and Pinus (Diploxylon, hard pines).4 Five species of pines are indigenous to India viz.P. roxburghii (Chir pine), P.wallichiana (Blue pine), P. kesiya (Khasi pine), P. gerardiana (Chilgoza pine) and P. merkussi (Teriasserian pine).5 Among all P. roxburghii,P. wallichiana and P. gerardiana are found in the Himalayas, whereas P. kesiya and P.merkussi are indigenous to Assam (India) and Burma.
The Indian Himalayan region, a birthplace of Ayurveda and alternative therapies, covers about 18% of India and extends more than 2,800 km long and 220-300 km wide with altitudes of 200-8000m. India fulfills 80% demand of Ayurvedic medicine, 46% of Unani drugs and 33% of allopathic drugs.6,7,8 The unique climatic conditions enable a rich array of growth of various medicinally useful plants.8 Pinus species are important forest primarily for timber interests and source of gum oleoresins. Three species of Pinus plants are abundantly found in Himachal Pradesh i.e. Pinus roxburghii, Pinus wallichiiana and Pinus gerardiana. P. roxburghii Sarg (chir pine) is a tall tree with spreading crown grows at an altitude of 450-2400m from Kashmir to Bhutan and Siwalik hills.9 P. wallichiana (blue pine) found at an altitude 2000-3500 m whereas P. gerardiana, commonly (Chilgoza pine) found at an altitude of 1600-3000m in district Kinnaur of Himachal Pradesh (H.P.). The present review was aimed to aware the researchers about the potential of Pinus species from Himalayas and to fully explore the scientific basis for the medicinal uses of these plant species.
Pinus roxburghii Habitat and morphology
Pinus roxburghii Sarg. (Pinaceae) is an older terrestrial ornamental plant in the world. It is the most important pine of North Western Himalayas and an important resin and timber yielding species. In India it is found in Himachal Pradesh, Kashmir and Uttaranchal.10. It is a large tree with spreading crown reaching 30-50 m with a trunk diameter of up to 2 m. It is found at the height of 500 to 2,500 m above sea level and grows gregariously.11 It is a large tree with branches in more or less whorled, bark dark gray, often reddish, deeply fissured, rough, exfoliating in longitudinally elongated plates, leaves in clusters of three, 20-30 cm, long, triquetrous, finely toothed, needle like, light green, persisting on an average for a year and a half; male flowers about 1.5 cm long, arranged in the form of cones, female cones, solitary or 2-5 together, ovoid, 10- 20 cm×7.5×13 cm when ripe.9 The tapping of the stem produces clear, transparent oleo-resin with the pungent and bitter taste. Taxonomy and common names of Pinus roxburghii Sarg are shown in Table 1.12
P. roxburghii is known to be a rich source of terpenoids, flavonoids, tannins, xanthones other compounds shown in Table 2. Structure of different bioactive compounds are given in Figure 1a, 1b, 1c.
|Part of plant||Bioactive constituents|
|Needle essential oil 14,15||α-Pinene (22.8%), camphene (0.4%), β-pinene(14.1), Δ3-carene (50.6%), α-phellandrene (0.1%),α-terpinene (0.4%), limonene (0.9%), β-phellandrene (0.7%), γ-terpinene (0.5%), p-cymene (tr), longipinene (0.2%), cyclosativene (tr), sativene (0.1%), longifolene (3.4%), β-caryophyllene (0.2%), α-terpeinyl acetate (0.3%), longicyclene (0.2%), terpinolene (3.8%), reported in resin. Zafar et al 2010 reported α-Pinene (29.3%), β-myrcene (1.1%), 3-carene (14.2%), terpinyl acetate (1.0%), α-terpineol (4.5%), borneol acetate (2.2%), α-longipinene (1.2%), caryophyllene (21.9%) and caryophyllene oxide (3.1%) in needle essential oil. Caryophyllene, 3 Carene, Alpha humulene, alpha pinene, Beta pinene, alpha terpineol, Car-3-ene, Longifolene, camphene, limonene, alpha ternene, alpha terpineol, alpha borneol.|
|Wood essential oil 13||Caryophyllene (16.75), Thunbergol(16.29), 3 carene (14.95%), Cambrene(12.08%), alpha thujene (10.81%), terpinolen (7.17%), alpha pinene(4.8%), alpha caryophyllene (3.7%), sabinene (3.79%), Verticol (1.84%), 4 terpineol (1.79%), myrcene (1.28%)|
|Bark essential oil 13||alpha pinene(31.29%), 3 carene (28.05%), Cambrene(4.86%), Longifolene (4.42%), Thunbergol(4.11), beta pinene (2.99%), sylbestrene (2.4%), terpineol (2.05%), terpinolen (2.03), terpinyl acetate(1.56%), elemol( 1.46%), Methyl dihydro abtate (1.3%), myrcene (1.36%), Bornyl acetate (1.1%), alpha cadinol (1.08%)|
|Stem and needle extract 14,16||Quercetin, resin acid (abietic acid, neoabietic acid), taxifolin, catechin, quercetin derivative, taxifolin derivative, catechin and gallocatechin, kaempferol, rhamnetin isorhamnetin, myricetin, 3,4-dihydroxybenzoic acid, 3,4-dihydroxycinnamic acid, monomethyl pinosylvin, dihydromonomethyl pinosylvin, resveratrol, glycoside, pinoresinol, secoisolariciresinol.|
|Petroleum ether extract 17||Friedelin, ceryl alcohol and β-sitosterol|
|Bark 17, 18||1,5-diliydroxy-3,6,7-triniethoxy-8-allyloxyxanthone, 1-hydroxy-3,6-diinethoxy-2-β glucopyranoxanthone, friedelin, ceryl alcohol, b-sitosterol, taxifolin, quercetin, catechin, kaempferol, rhamnetin, 3,4-dihydroxybenzoic acid, 3,4-dihydroxycinnamic acid, pinosylvin, pinoresinol, resin acid, sterols, gallocatechin and tannins Hexacosylferulate|
|P. roxburghii needles wax 19||12-hydroxydodecanoic acid, 14-hydroxytetradecanoic acid and 16- hydroxy-hexadecanoic acid|
Pinus roxburghii has been widely used as a traditional remedy by the local tribes in various parts of Northern India. The wood oil is antiseptic, diaphoretic, rubefacient, aromatic and carminative in nature. It is used as nerve tonic and expectorant and as remedy for diseases of the eye, ear, pharynx, hemorrhages, worm infestations and skin.20 The bark paste is applied in burns, scalds and ulcers. The timber is largely used for various purposes e.g., matchbox industry, sports goods, musical instruments, house building, furniture, tea chests etc. The volatile component of resin known as turpentine oil is the most important basic raw material for the synthesis of terpene chemicals widely used as adhesives, lubrication, solvents, plasticizers, paints and varnishes, antiseptic and expectorant. It is included in the Indian Pharmaceutical Codex as Oleum terebintinae for treatment of chronic bronchitis.21 Turpentine oil is applied externally as rubefacient in lumbago and arthritis. It is also used as remedy for neuralgia, minor hemorrhages of tooth sockets and also recommended in gangrene of lungs.22 It is used to arrest minor haemorrhages in tooth sockets and nose. In the form of enema used in obstinate constipation. Inhaling the vapors of turpentine is useful in bronchitis. Resin (Biroja) is obtained as solid residue in the distillation of turpentine oil from oleoresin. It is used for bangles, varnish, paints, polish industries, ingredient of printing inks, batteries. To heel cracks boiled resin (khaida or leesa) are used. The carbon is collected from the burnt resinous wood (doi) of P. roxburghii mixed with mustard oil and is made into a paste (kajal), which is applied inside the lower eyelids to keep the eyes clean and attractive.23 The resin mixed with the ash of Betula utilis is commonly applied over sprains and plastered on fractured bone for quick recovery, soften scar tissue and consumed as remedy in worm infestation and gastric trouble.24 The resin is a stimulant and used internally as stomachic and in gonorrhea. The bark has tannins used for coloring the leather. Leaves are used in construction of roofs as “Channana’’. The needles of Pinus roxburghii are ground and mixed with water and given to patients suffering from measles. The oil obtained by the distillation of the needles is used in muscular pains and as expectorant.25 The seeds from the female cones are edible and are consumed in treatment of bronchitis, tuberculosis and urinary bladder infections.25
Pinus roxburghii is majorly a timber yielding plant and hence possess high commercial value. The heartwood of the plant is used in the making of furniture and building houses while the softwood is used in packaging cases and tea chest.26 The bark is rich in tannins and finds its application in tanneries. The resin is commonly used to repair broken ceramic pottery. It is also used in protective coatings, varnishes and printing ink. When destructively distilled, resin produces a viscous liquid called rosin oil which is used as lubricating greases.27 Turpentine oil is commercially important as it is a major component in varnishes, thinners, sealing wax, soaps and disinfectants.27
Pharmacological uses Hepatoprotective Activity
Imran et al, 2012 studied hepatoprotective activity of wood oil of Pinus roxburghii at doses of 200, 300 and 400 mg/kg on rat liver damage induced by carbon tetrachloride and ethanol. The substantially elevated enzymatic levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and decreased level of reduced glutathione (GSH) and total protein were significantly restored to normal levels.10
Analgesic and Anti-inflammatory Activities
Alcoholic extract of Pinus roxburghii bark exhibited anti-inflammatory and analgesic activityat the doses of 100, 300 and 500 mg/kg (analgesic activity was evaluated by acetic acid-induced writhing and tail immersion tests in swiss albino mice. Acute and chronic anti-inflammatory activity was evaluated by carrageenan-induced paw oedema and cotton pellet granuloma in wistar albino rats. These activities were due to the presence of polyphenolic compounds present in the extract.28
Kaushik et.al., 2012 reported alcoholic extract of Pinus roxburghii extract at doses of 100, 300 and 500 mg/kg was effective against generalized tonic-clonic and partial seizures using maximal electroshock induced seizure model in rats.29
The alcoholic extract of P. roxburghii was evaluated as antiasthmatic using guinea pig ileum preparation (in-vitro), histamine-induced bronchospasm in guinea pigs and catalepsy in mice (in-vivo). Anti-allergic activity of the plant was evaluated using milk-induced leukocytosis in mice and passive paw anaphylaxis in rats (in-vivo).30
Antioxidant and Antidyslipidemic Activities
Pinus roxburghii needle extract possesses significant potential to lower the level of plasma lipid profile followed by a beneficial effect on high density lipoproteins (HDL) in high fat diet fed hyperlipidemic golden Syrian hamster model. Antioxidant activity of n- butanol fraction and alcoholic extract was found to be significant when assessed by trolox equivalent antioxidant capacity (TEAC) assay. Sharma et.al., 2016 described plant extract of Pinus roxburghii bark posses significant antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and nitric oxide assays.11,31
Petroleum ether, ethyl acetate, chloroform and ethanol extract of Pinus roxburghii Sarg. was evaluated for anticancer activity on IMR-32 Human Neuroblastoma cancer cell line and implicit the observation that petroleum ether and Chloroform extracts having promising activity. Cone essential oil of P. roxburghii showed notable cytotoxic activity on MCF-7cells at 100 μg/ml.32,33
The plant extract shows the antimicrobial potential against a wide variety of microorganisms . Bissa et.al., 2008 studied antibacterial activity of aerial parts of Pinus roxburghii against E.coli, Enterobacter aerogenes, Agrobacterium tumefaciens.25 Sharma et. al., 2016 reported significant antimicrobial activity of Pinus roxburghii bark extract against Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Candida albicans and promising antifungal activity against Candida albicans 31 Aqueous and alcoholic extracts from P. roxburghii stem, leaves, bark, female cone and male cone showed growth-inhibitory activity against the bacterial plant pathogen Agrobacterium tumefaciens.34
Ethanolic extract of Pinus roxburghii bark at dose of 100, 300, 500 mg/kg possesses significant antidiabetic activity in alloxan-induced-diabetic rats.35 In an in-silico study by Kaushik et. al., 2014, it was observed that secoisoresinol, pinoresinol, and cedeodarin showed the best docking results on different diabetic receptors.36 In an another study Kaushik et. al., 2015 showed that the extracts from the bark of Pinus roxburghii by bioassay guided fractionation have good antidiabetic activity when tested through α-amylase inhibitory assay in-vitro.37
Pinus gerardiana Habitat and morphology
Pinus gerardiana, known as the chilgoza pine, (noosa, or neoza) is a pine native to the northwestern Himalayas. There are about 29 species of pine which produce edible nuts those are utilized by indigenous tribal cultures in the world. In India, out of six species of pine, Pinus gerardiana is the only species which produces edible and highly nutritious nuts.38 This species is distributed not only in India but also in Afghanistan, Tibet, Baluchistan (Pakistan) between 2000 and 3350 m elevation.39,40,41 In India, it is distributed only in Himachal Pradesh (Kinnaur and Chamba Districts) and Jammu and Kashmir.
The branches are slightly ascending, and usually not whorled. The bark exfoliates in irregular thin flakes, gray in colour. The leaves are needle like, stiff, dark green, and are arranged in clusters of three. Male cones are long, and female cones are oblong ovoid with thick woody scales. Seeds are cylindrical, elongated, dark brown pointed at the tip, measure and bear a rudimentary wing. Pinus gerardiana is well known for its edible seeds (Chilgoza), rich in carbohydrates and proteins. These “nuts” are known and sold locally under the name of Chilgoza, “Neja” (singular) or “Neje” (plural). Chilgoza is only pine which is of immense social forestry importance because it is an income source for tribal peoplein the Kinnaur district of Himachal Pradesh.42 They are either eaten raw or roasted and are also included as an ingredient in a variety of traditional dishes, such as breads, candies, sauces and cakes, as well as in vegetable and meat dishes. In general, pine nuts are known to be a good source of nutrients. Taxonomy and common names of Pinus gerardiana are given in Table 4.
|Hepatoprotective 10||Wood oil||(200, 300, 500) mg/kg||Carbon tetrachloride and ethanol induced hepatotoxicity|
|Analgesic 28||Bark||(100, 300, 500) mg/kg||Acetic acid induced writhing and tail immersion test in Swiss albino rats|
|Anti inflammatory28||Bark||(100,300,500) mg/kg||Carrageenan induced paw oedema and cotton pellet granuloma in wistar albino rats|
|Anti convulsant activity 29||Bark||(300, 500) mg/kg||Maximal electroshock(MES) and Pentylenetetrazole(PTZ) induced seizures in wistar albino rats .|
|Anti asthmatic activity 30||Whole plant||100mg/kg||Histamine induced broncospasm in guinea pig and catalepsy in mice|
|Antidyslipidemic 31||Needle||100mg/kg||High fat diet fed hyperlipidemic golden Syrian hamster|
|Anticancer 32,33||Bark Cone oil||(100, 200, 400, 800 )μg/ml 100μg/ml||IMR-32 Human neuroblastoma cancer cell line MCF- 7 cells|
|Antibacterial and antifungal 25, 31,34||Needles and female cones Bark||5mg/ml (500, 1000, 1500) μg/ml||E. coli, Enterobacter aerogenes, Agrobacterium tumefaciens, Pseudomonas aurignosa, E. coli, Staphylococcus aureus, Klebsiella pneumonia, Candida albicans|
|Antidiabetic 37||Bark||(100,300,500 ) mg/kg||Alloxan induced diabetic rats|
The nuts are considered to be rich source of various nutrients including proteins, carbohydrates, fibers, minerals besides its higher amount of oil. Its oil is of very good quality, free of cholesterol and a rich source of fatty acids like Stearic acid (0.3%), Linoleic acid (Omega-6) (51.3 %), Linolenic acid (Omega-3) (1.5% ) Oelic acid (Omega-9) (39.7% Arachidic acid (2.1%) Palmitic acid (7.2%).43 Hoon et. al., 2014, reported approximately 50% fat, 30% protein, 10% carbohydrate, 4% ash and 6% moisture in Pine nuts.44 The seeds with edible kernels are obtained from ripe cones credited with carminative stimulant and expectorant properties. Analysis of kernels possesses delicate terbinthine flavor, moisture (7.5%), protein (15.9%), fat (49.9%), carbohydrates (21.6%), fibre (2.2), and mineral matter ( 2.9%). On pressing kernels yielded a transparent clear oil having pale yellow. Low molecular weight components in pine nuts from Pinus pinea includes glucose, fructose, sucrose, and raffinose, several soluble carbohydrates, saccharides (galactose, maltose, and planteose) and cyclitols (pinitol, galactinol, galactopinitol A1, fagopyritol B1, and other glycosylinositols). Most abundantly found cyclitols are chiroinositol, fagopyritol B1, and pinitol.45 Structure of different bioactive compounds from Pinus gerardiana are shown in Figure 3.
The cones and wood are used as timber and firewood. Branches are commonly used as roof thatching materials in houses. Wood is also used as building material and making of huts and wooden boxes.46 The bark of the tree is made into baskets and also into rough buckets forfetching water.47,48 Tan or green dye is obtained from the needles. The needles contain a substance called terpene, released when rain washes over the needles and it has a negative effect on the germination of some plants, including wheat.49,50 The resins are obtained by tapping the trunk, or by destructive distillation of the wood. Turpentine consists of an average of 20% of the oleoresin separated by distillation. Turpentine has a wide range of uses, including as a solvent for waxes etc, for making varnishes. Rosin is the substance left after turpentine is removed. This is used by violinists on their bows and also in making sealing wax, varnish etc. Pitch can also be obtained from the resin and is used for waterproofing, as a wood preservative etc.51 Chilgoza is considered as one of the important dry fruits of the tribal area having carminative, stimulant and expectorant properties.
The main economic use is its edible, oil-rich seeds (neoza in Hindi), which are harvested by knocking the cones from the trees in autumn and during early winter. The Chilgoza pine on tapping yield oleoresin of good quality, but owing to its limited availability and avoidance of destruction of trees for obtaining most valuable seeds the species has not been exploited commercially for timber. In traditional systems, sufficient cones are usually left on the tree to ensure that some seed is available for natural regeneration.42
Pharmacological uses Antioxidant assay
Hoon et. al. 2014, studied total antioxidant capacity and the presence of antioxidant compounds in Pinus gerardania. Antioxidant compounds such as gallocatechin, catechin, lutein, lycopene, caretenoids and tocopherols are present in P. gerardania. Gallocatechin had the highest presence out of all the compounds.44 Sharma et. al. 2016, revealed the presence of various biochemical compounds such as alkaloids, flavonoids, glycosides, triterpenoids and saponins in P. gerardania. Quantitative phytochemical analysis of plant extracts showed the presence of phenolics, flavonoids, tannins, beta-carotene and lycopene. Bark extract showed significant antioxidant activity against DPPH, nitric oxide and H2O2 free radicals scavenging assays.31
Cardiovascular disorders and thromboembolism
P. gerardiana nut oil caused blood clot lysis in-vitro, in vitro whole blood coagulation was also seen reduced. P. gerardiana nut oil has no effect on blood cell indices in-vivo. It was found effective in treatment of cardiovascular disorders and thrombo embolism.52
Hydroalcoholic extract of P. gerardiana stem bark at 500, 1000, 1500, 2000, 2500 ug/ml showed in-vitro anti-inflammatory activity, carried out using albumin denaturation and HRBC membrane stabilization assays.31
Antimicrobial and antifungal activity
Hydro-alcoholic extract of P.gerardiana at 500, 1000, 1500 ug/ml possessed potent antibacterial activity against Gram positive (S. aureus) and Gram negative (E. coli, P. aeruginosaand K. pneumoniae) bacteria and showed prominent antifungal activity against Candida albicans.31
Pinus wallichiana Habitat and morphology
Pinus wallichiana (Bluepine/Kail), is coniferous evergreen tree native to Himalayas, Karakoram and Hindu Kush mountains from eastern Afghanistan, east across northern Pakistan and India. The species grows naturally along the entire length of temperate Himalayas usually at altitudes ranging 2000 to 3,500 meter above mean sea level.53 Tree is 50+ m tall with straight trunk and short downcurved branches. Branches longer in solitary trees, creating a dome-like crown.40. Bark is smooth and resinous in young stems, turning grey and corky with shallow fissures on mature trees with height of 36m. Bluish green leaves are needle like and are in clusters of five, 10-20 cm long, cones are light brown and when ripe are very resinous and easily distinguishable from other pines. Female cones are in groups of 1-6, 20-30 cm long, erect when young but later pendant, bluish-green when young, maturing to light brown with pale brown apophyses.40 Of the Indian pines, it is the finest pines of north-western Himalayan region, is well known for its commercial and ecological importance, the wood of the blue pine is considered to be the best and stands next to deodar in value.54,55,56 Though exploited mainly as a source of timber, the species is good source of oleoresin also, which is used for the production of turpentine oil, rosin, needle oil and camphor57,58 Taxonomy and common names of Pinus wallichiana are shown in Table 6:
|Antioxidant assay 31,44||Chilgoza||(62.5, 125, 250, 500, 1000) mg/kg||DPPH, ABTS, radical cation scavenging assay.|
|Cardiovascular disorders and thromboembolism 52||Nuts oil||30μl/ml, 60μl/ml 200μl/ml||Fibrinolytic activity, Epinephrine and collagen activated platelet aggregation|
|Antiinflamatory 31||Bark||500, 1000, 1500, 2000, 2500 μg/ml||HRBC membrane stabilization assay, Albumin denaturation assay|
|Antimicrobial assay 31||Bark||500, 1000, 1500 μg/ml||S. aureus, E. coli, P. aeruginosaand K. pneumonia, Candida albicans|
Traditional and commercial uses
Many species of Pinus yield valuable timber used for making furniture, door, window frames, paper pulp.42 The wood is moderately hard, durable and highly resinous. It is a good firewood but gives off a pungent resinous smoke. Pine timber is divided in hard pines of two or three needled species and soft pine of five needled species. In India P. wallichiana (Kail) and Pinus roxburghii yield commercial timber. It is a commercial source of turpentine which is superior quality than that of P. roxburghii but is not used so freely.42 It is of similar timber properties and quality to P. strobus and P. monticola in North America, with tall, straight trees producing wood of good strength.
Sharma et. al., 2016, reported the presence of alkaloids, flavonoids, tannins, phenols, lycopene and carotenoids in hydroalcoholic extracts of Pinus wallichiana stem bark extract. 31 Presence of other constituents are shown in Table 7. Structure of different bioactive compounds are given in Figure 5.
|Plant part extract||Bioactive constituents|
|Needle extract 59||Quercetin (21.426 %), Isorhamnetin (2.857 %) β-sitosterol,β-sitosterol-3-O-β-d-glucopyranoside,5-hydroxy-7-methoxy-2-(4-methoxyphenyl)-4H-chromen-4-one, Oleanolic acid|
|Stem bark methanolic extract 60||Kampherol (2.300%), Rhamnetin (2.08 %), Myrcetin (3.0%), Isorhamnetin (2.005%), Quercetin (5.009)|
|Turpentine 61||α-pinene(90%), Abietic and isopimaric acid, lambertianic acid.|
Pharmacological Activities Antimicrobial activity
Sharma et. al., 2015 reported hydroalcoholic needle extract of Pinus wallichiana have significant antibacterial activity against P. aeruginosa and E. coli. Hydroalcoholic stem bark extract of Pinus wallichiana possess significant antibacterial activity against Pseudomonas aurignosa, S. aureus, K. pneumonia and possesses potent antifungal activity against Candida albicans.31 In another study by Rahman et. al., 2016 Pinus wallichiana showed potent antibacterial and antifungal activity against Escherichia coli, Bacillus subtilis, Shigella flexenari (clinical isolate), Staphylococcus aureus, Pseudomonas aeruginosa and Salmonella typhi, the fungal strains were Trichophyton longifusis (clinical Isolate), Candidaalbicans, Aspergillus flavus, Microsporum canis and Candida glaberata.62
Different fractions of Pinus wallichiana extract were tested against various insects Rhyzopertha dominica, Tribolium castaneum and Callosobruchus analis. The The n-hexane fraction showed 20 % activity against R. dominica, while the ethyl acetate showed 20 % activities against all the strains. The chloroform revealed 20 % activity against R. dominica, while the aqueous showed 20 % and 40 % activity against R. dominica and C. analis.60
The n-hexane, ethyl acetate, chloroform, aqueous fractions of Pinus wallichiana needles showed significant phytotoxicity activity at 500μg/ml, while at low concentration 50μg/ml and 5μg/ml showed moderate activity.60
Hydroalcoholic extract of leaves and stem bark of Pinus wallichiana possess significant in-vitro antioxidant activity when tested in DPPH, nitric oxide radical scavenging, hydroxyl radical scavenging and hydrogen peroxide radical scavenging assays. Presence of phenolics, flavonoids, tannins, carotene were also reported in Pinus wallichiana.62,31
Hydroalcoholic stem bark extract of Pinus wallichiana possesses significant in-vitro anti-inflammatory activity when tested through albumin denaturation and RBC membrane stabilization assays.31
A summary of commercial formulations of Pine species is given in Table 9.
|Antimicrobial activity60,62||Needles||24mg/ml||Agar well diffusion method|
|Insecticidal activity60||Needles||20mg/kg||Insects: Rhyzopertha dominica, Tribolium castaneum and Callosobruchus analis.|
|Antioxidant31||Bark||(10,20,40,80,100) μg/ml||DPPH, Nitric oxide and Hydroxyl radical scavenging assay|
|Anti inflammatory31||Bark||(500, 1000, 1500, 2000, 2500) μg/ml||Albumin denaturation, HRBC membrane stabilization|
This review furnishes the presence of several phytochemical components and pharmacological properties of Pinus roxburghii, Pinus wallichiana and Pinus gerardiana. The pharmacological activities reported in the present review confirm that the therapeutic value of these plants is very high, having a leading capacity for the development of a new, safe, effective and cheaper drug in future. But there is need for more elaborative study, pharmacological investigations, clinical trials, more exploration and public awareness for the best utilization of medicinal properties of these pine species. Even the industrial entrepreneurs also should come forward with new concepts and steps towards the best use of these potential medicinal pine species. Lets hope that in future herbal products will be competing modern medicines with added advantages of more safety and lower costs.
HDL: High Density Lipoprotein; DPPH: 2,2,diphenyl picrylhydrazyl; TEAC: Trolox equivalent antioxidant activity; ABTS: 2,2’-azino-bis(3-ethylbenzothiazoline-6sulphonic acid.
A pine is any conifer in the genus Pinus of the family Pinaceae.
Pinus is the largest genus of monoecious, resiniferous, evergreen trees commonly known as Pines.
Pinus roxburghii, Pinus wallichiana, Pinus gerardiana are native species of Pine from Himalayas.
The constituents present in these pinus plant species are beneficial for the purpose of treatment of various ailments.
The phytoconstituents and pharmacological activities of the pinus plant species confirm that the therapeutic value of these plants is very high, having a leading capacity for the development of a new, safe, effective and cheaper drug in future.