Abstract
Bryophytes are the second largest group of land plants after angiosperms. There is very less knowledge available about medicinal properties of these plants. Bryophytes are popular remedy among the tribal people of different parts of the world. Tribal people use these plants to cure various ailments in their daily lives. Bryophytes are used to cure hepatic disorders, skin diseases, cardiovascular diseases, used as antipyretic, antimicrobial, wound healing and many more other ailments by different tribal communities of Africa, America, Europe, Poland, Argentina, Australia, New Zealand, Turkey, Japan, Taiwan, Pakistan, China, Nepal and different parts of South, North and Eastern India. Apart from ethno-medicinal uses some bryophytes possesses antitumor activities against different cancer cell lines and this property of bryophytes needs to be more focused in the future. Compile information about medicinal properties and anticancer properties of bryophytes is lacking till date. In the present review, the authors tried to compile all the ethno-medicinal and other related information of bryophytes and fill the knowledge lacuna in this particular field. Some published reviews are available but the information is segregated. This manuscript will help people doing research in the bryophytes.
Keywords: Anti cancer, Hepatic disorder, Hornworts, Liverworts, Mosses
Graphical abstract
1. Introduction
The division bryophytes include mosses (Bryopsida or Musci), hornworts (Anthocerotopsida or Anthocerotae) and liverworts (Hepaticopsida or Hepaticae) and represented by 14,000 to 15,000 species around the world. The mosses contains approximately 8000 species, liverworts 6000 species and hornworts 200 species.1 Some studies stated that these are the second largest group of land plants after angiosperms.2 In India, bryophytes represented by total 2504 species comprising 17.27% of world bryophytes. Among these, 642 species of bryophytes are endemic to India, showing 25.64% endemism. In India, mosses represented by 1786 species and 355 genera, liverworts 675 species and 121 genera and hornworts 25 species and 6 genera.3, 4 A total of 133 threatened species are reported from India and placed under rare category, out of these 78 species are mosses, 53 are liverworts and 2 are hornworts. Furthermore, 14 species from a different groups of bryophytes are recorded under the endangered category of threatened plants in India.5
Bryophytes play a remarkable role in maintaining ecosystems because they provide an important buffer system for other plants. As bryophytes do not have seeds or flowers hence they are placed under cryptogams. These plants are less known to most people due to the small size consequently less biomass made these plants neglected for wide use.6 They are found everywhere in the world from desert to ice cold polar region except seas. From the ancient times, bryophytes were used in packing, plugging as well as in decoration.
Bryophyte are used as indicator species, erosion control, bioindicators of heavy metals in air pollution, aquatic bioindicators, radioactivity indicators, as material for seed beds, fuel, medicines and food sources, pesticides, nitrogen fixation, moss gardening, treatment of waste, construction, clothing, furnishing, packing, genetic engineering and for soil conditioning and culturing.7, 8 The active constituents of bryophytes are widely used as antibacterial, antifungal, cytotoxic, antitumor and insecticidal9, 10 also in medicinal and agricultural areas.7, 11
The phytochemistry finding of bryophytes exhibit a greater range of biologically active compounds such as carbohydrates, lipid, protein, steroids, polyphenols, terpenoids, organic acids, sugar alcohols, fatty acids, aliphatic compounds, acetogenins, phenylquinones, and aromatic and phenolic substances which show significant bioactivities.12, 13
2. Material and methods
In the present review, information about bryophytes and their medicinal properties and biochemical properties was gathered via searching scientific databases including PubMed, Elsevier, Google Scholar, Springer etc. and related books either online or offline.
3. Aim of present review
Information about medicinal properties of bryophytes is segregated and not present in well documented form. In the present review, we have been trying to compile information regarding to medicinal properties and other related pharmacological properties of bryophytes.
4. Medicinal properties
4.1. Ethno-medicinal properties
An ancient method of determining the medicinal properties of plants is the concept of Paracelsus “doctrine of signatures” which deals with resemblence of plant body parts to shape and structure of organ in the human or animal body for which it is remedial. As per above philosophy, liverworts (e.g. Marchantia polymorpha) used to cure hepatic disorders.14 Similarly, Polytrichum commune bears hairy calyptra and called hair cup moss. The expressed oil from this moss was used by the women's of ancient time on their hair.8 Bryophytes adequately used in traditional Chinese medicinal system. Different ethnic groups of different parts of the world used these tiny plants to cure various ailments in their daily lives. The people of Gaddi tribes of Himachal Pradesh, India used Plagiochasma appendiculatum for treating skin diseases.15 The thalloid Targionia hypophylla used by Irular tribe of the Attappady valleys of Kerala state to cure skin diseases due to resembles of thallus of this liverwort to the rough surface of the diseased part. Due to long-stemmed and hair-like thallus of Frullania ericoides this liverwort is applied for hair-related afflictions by tribal people of South India.16 More information about ethno-medicinal uses of bryophytes is summarized in Table1.
Table1.
Ethano-medicinal properties of bryophytes.
Botanical name | Family | Uses | References |
---|---|---|---|
Liverworts | |||
Riccardia Gray. sp. | Aneuraceae | Used for anti-leukemic activity | 17, 18 |
Plagiochasma appendiculatum Lehm. & Lindenb. | Aytoniaceae | Used in skin diseases (the fine paste of the thoroughly washed thalli is applied externally on affected area) | 17, 19 |
Reboulia hemisphaerica (L.) Radd | Aytoniaceae | Used for blotches, hemostasis, external wounds, and bruises | 9 |
Conocephalum conicum (L.) Underw. | Conocephalaceae | Used as antimicrobial, antifungal, antipyretic, antidotal activity; used to treat cuts, swollen tissue, scalds, burns, fractures, poisonous snake bites, and gallstones | 17, 20 |
Herbertus Gray. sp. | Herbertaceae | Used as antiseptics, antidiarrheal agents, expectorants and astringents | 17, 18 |
Frullania tamarisci (L.) Dumort. | Jubulaceae | Used for antiseptic activity | 9 |
Frullania ericoides (Nees ex Mart.) Mont. | Jubulaceae | Used to get rid from head lice (Pediculus humanus) and nourishment of hair | 16 |
Marchantia polymorpha L. | Marchantiaceae | The thallus Paste applied externally on inflammation, used as diuretics, for liver ailments, insect bites, used to cure cuts, fractures, poisonous snake bites, | 18, 19, 21 |
Marchantia convoluta Gao et K.C. Zhang | Marchantiaceae | Used for treatment of hepatitis, fever and gastric intolerance | 22 |
Marchantia palmata Nees | Marchantiaceae | Fleshy leaf paste is directly applied during acute inflammation caused by the touch of fire and hot | 23 |
Marchantia paleacea Bertol. | Marchantiaceae | Used in skin tumefaction, hepatitis and as antipyretic | 24 |
Dumortiera hirsuta (Sw.) Nees | Marchantiaceae | Used as source for antibiotics | 18 |
Pallavicinia Gray. sp. | Pallaviciniaceae | Used as antimicrobial agent | 18 |
Plagiochila (Dum.) Dum. sp. | Plagiochilaceae | Used for anti-leukemic activity/anti-microbial activity and used as perfumes or as perfume components | 17, 9 |
Plagiochila beddomei Steph. | Plagiochilaceae | Used for wound healing | 25 |
Riccia L. sp. | Ricciaceae | The thallus is washed and ground to paste and mixed with jiggery and given to the children affected by the ringworms. | 19 |
Targionia hypophylla L. | Targioniaceae | Used with leaves of (Actiniopteris radiata) ground in to a paste and mixed with two tablespoons of coconut oil and smeared over the body of the children affected by scabies, itches and other skin diseases | 16 |
Mosses | |||
Cratoneuron filicinum (Hedw.) Spruce | Amblystegiaceae | Used to treat heart disease | 9, 11 |
Leptodictyum riparium (Hedw.) Warnst. | Amblystegiaceae | Used as antipyritic and in uropathy | 11 |
Philonotis fontana (Hedw.) Brid. | Bartramiaceae | Used to relieve pain of burn and heal burns, adenopharyngitis, antipyretic | 9, 11, 26 |
Philonotis Bridel sp. | Bartramiaceae | Used to heal burns, for adenopharyngitis, as antipyretic and antidote | 9 |
Plagiopus oederi (Brid.) Limpr. | Bartramiaceae | Used as sedative, epilepsy | 11 |
Bryum argenteum Hedw. | Bryaceae | Used as antidote, antipyretic, antifungal | 9 |
Rhodobryum giganteum (Schwagr.) Paris | Bryaceae | Used to treat cardiovascular problem and nervous prostration, to cure angina, anti-hypoxia, diuretic, antipyretic, and antihypertensive | 9, 11, 27 |
Rhodobryum roseum (Hedw.) Limpr. | Bryaceae | Used to treat nervous prostration and cardiovascular diseases sedative | 9, 11, 28 |
Leucobryum bowringii Mitt. | Dicranaceae | During body pain, paste of leaf tips mixed in a cup of Phoenix sylvestris | 25 |
Oreas martiana (Hoppe and Hornsch.) Brid. | Dicranaceae | Used for anodyne (pain), hemostasis, external wounds, epilepsy, menorrhagia, and neurasthenia (nervosism, nervous exhaustion) | 9 |
Ditrichum pallidum (Hedw.) Hampe | Ditrichaceae | Used for convulsions, particularly in infants | 9, 11 |
Entodon flavescens (Hook.) A. Jaeger | Entodontaceae | Used during earache, leaf juice is used as ear drops, during cold, leaf juice is administered daily twice | 25 |
Fissidens nobilis Griff.= (Fissidens japonicus Dozy and Molk.) | Fissidentaceae | Used for growth of hairs and diuretic activity | 11, 18 |
Funaria hygrometrica Hedw. | Funariaceae | Used for hemostasis, pulmonary tuberculosis, bruises, skin infection | 11 |
Fontinalis antipyretica Hedw. | Fontinalaceae | Used in chest fever | 29 |
Taxiphyllum taxirameum (Mitt.) M. Fleisch. | Hypnaceae | Used for external wounds, hemostasis | 9, 11 |
Aerobryum lanosum (Mitt.) Mitt. | Meteoriaceae | Used during burns, decoction of whole plant boiled in goat urine is applied externally | 25 |
Mnium cuspidatum Hedw. | Mniaceae | Used for hemostasis, nose bleeding | 9, 11 |
Mnium Hedw. sp. | Mniaceae | Poultice to reduce pain of burns, bruises and wounds | 18 |
Plagiomnium T. Kop. sp. | Mniaceae | Used for infections and swellings | 18 |
Octoblepharum albidum Hedw. | Octoblepharaceae | Used as febrifuge and anodyne | 30 |
Dawsonia superba Grev. | Polytrichaceae | Used as diuretics, hair growth stimulation and for treating cold | 18 |
Polytrichum commune Hedw. | Polytrichaceae | Used for hemostasis, wound healer, antipyretic, antidotal activity, dissolve kidney and gall bladder stones, to speed up labor process during child birth | 11, 19, 20, 31, 32 |
Polytrichum juniperinum Hedw. | Polytrichaceae | Used to treat prostate, uninary difficulties and skin ailments | 8, 31 |
Pogonatum macrophyllum Dozy & Molk. | Polytrichaceae | Used to reduce inflammation and fever, also used as detergent diuretic, laxative and hemostatic agent | 17, 18 |
Barbula unguiculata Hedw. | Pottiaceae | Used to treat fever and body aches | 18 |
Barbula indica (Hook.) Spreng. | Pottiaceae | Used during menstrual pain and intermittent fever | 25 |
Hyophila attenuata Broth. | Pottiaceae | Used during cold, cough and neck pain, leaf decoction is administered with a pinch of pepper powder daily | 25 |
Weisia viridula (L.) Hedw. | Pottiaceae | Used to treat cold and fever | 9, 11 |
Sphagnum sericeum Mull. Hal. | Sphagnaceae | Used to dressing wounds, with anti-microbial properties for skin ailments (insects bites, scabies, acne), haemorrhoids and to treat eye diseases | 18 |
Sphagnum teres (Schimp.) Angstrom | Sphagnaceae | Used to treat eye diseases | 8, 20 |
Haplocladium microphyllum (Hedw.) Broth.=(Haplocladium capillatum (Mitt.) Broth.) | Thuidiaceae | Used to treat cystisis, bronchitis, tonsillitis pneumonia and fever | 11, 20 |
Hornworts | |||
Ceratophyllum demersum L. | Ceratophyllaceae | Used as purgative, astringent, constipating and antipyratic | 33 |
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4.2. Anticancer properties
A number of naturally derived compounds act as an important source of several useful anti-cancer agents. Polytrichum commune used in Traditional Chinese Medicine (TCM) for curing diseases such as fever, hemostatic and traumatic injury to pneumonia, uterine prolapse and lymphocytic leukemia.34 Apart from this, the pharmacological exploration of acid and alcohol extract of Polytrichum juniperum exhibited inhibitory property against Sarcoma 37 implanted in CAF1 mice.35 The compound ohioensin A isolated from Polytrichum ohioense shows cytotoxicity against 9PS murine leukemia and MCF-7 human breast tumor cells. Benzonaphthoxanthenones and cinnamoyl bibenzyls derivatives isolated from ethanolic extract of Polytrichum pallidisetum can significantly impede the growth of RPMI-7951 melanoma and U-251glioblastoma multiforme.36 Bryophytes have great potential for anti-leukemia activity. Marchantin A from Marchantia palacea, M.polymorpha, and M.tosana, riccardin from Riccardia multifida, and perrottetin E from Radula perrottetii show cytotoxicity against the leukemic KB cells.37 The active constituent Diplophyllin, an ent-eudesmanolide isolated from liverworts Diplophyllum ablicans and D.taxifolium having α-methylene lactone unit showed significant anticancer activity against human epidermoid carcinoma.38 The Sesquiterpenoids costunolide and tulipinolide isolated from Frullania monocera, Marchantia polymorpha, Porella japonica, Wiesnerella denudate, Conocephalum supradecomositum and Plagiochila semidecurrens showed the anticancer activity against human carcinoma of the nasophaynx. The compound extracted from Plagiochilla fasciculatae seemed to inhibit P388cells (leukemia).39 It has been also suggested that mosses also retard the growth of cancer cell in culture.1 The mechanism of how bryophytes inhibit growth of different cancer cell lines and exhibit anticancer activity yet to be studied.
5. Other miscellaneous uses
The synthetic compound like pesticides, fungicides, rodenticides and insecticides are used commercially by the people that might have adverse effects on the environment and human health related issues. Apart from this, the concerted use of insecticides leads to increased resistance in insects.40, 41 Therefore, environment friendly and low toxicity new natural products are needed to provide alternatives to hazardous chemical that may otherwise alter the soil health and chemistry.
The use of bryophytes with insecticidal activity has gained importance over the past few years. Fatty acids derived from Hypnum cupressiforme, Dicranum scoparium, Polytrichastrum formosum, Homalothecium lutescens and liverwort Conocephalum conicum, used as insecticides against Sitophilus granaries. Likewise, the solution of moss powder of Calymperes afzelii, Thuidium gratum, Bryum coronatum and Barbula lambarenensis used against maize stem borers.42, 43 Several reports also confirmed the importance and activities of plants extract worked against insects44 fumigant45 contact46 repellent47 and antifeedant effects on stored product pests.48
Mosses like Bryum, Hypum and Fissidens growing in association with thallophytes in shallow waters of lakes, streams and spring contain huge amount of lime and act as rock builders. The insoluble calcium carbonate precipitates along with mosses and their symbionts aids in soil conservation. Developed countries like Sweden, West Germany, Finland, Poland, Ireland and Soviet Union uses hepaticae and musci as a source of fuel for generating natural gas, hydrogen, ethylene, methanol, etc. Among the mosses, peat mosses are the best sources of fuel for generation of heat, methane and have rapid regeneration, low sulfur content and their heating value is greater than that of wood.7 Bryophytes lack a leaf cuticle hence they are able to gain and loss water more quickly. Unlikehigherplants, these plants have the ability to absorb minute quantities of available moisture from fog, mist and dew that otherplants cannot utilize. The other uses of bryophytes like-liverworts and mosses as good indicators of environmental conditions, growth regulator (auxins, gibberellins, cytokinins and ethylene) and mosses as stuffing material.24
6. Negative impact of bryophytes
Few species of Frullania such as F.dilatata Dum., F.tamarisci Dum. F.tamarisci spp. nisquallensis, Chiloscyphus polyanthos and Schistochila appendiculata have been described as causative of potent allergic contact dermatitis because of containing a number of sesquiterpene lactones with an α-methylene γ-lacone functionality. These above mentioned species of Frullania also possess medicinal significance and growing epiphytically on the bark of trees, and hence have been recognized in areas of Canada, the United States, Finland and France as the cause of occupational contact dermatitis in forest workers, woodcutters and olive pickers.49, 50, 51 The allergens (+)-frullanolide and (−)-frullanolide are isolated from F.dilatata and F.tamarisci subsp. Tamarisci, respectively cause very intense allergenic contact dermatitis. The allergens of the Schistochila appendiculata are long-chain alkylphenols, 3-undecyl, 6-undecyl, 3-tridecyl, 3-pentadecyl, and 3-heptadecyl phenols, long-chain alkyl salicylic acids, 6-tridecyl, 6-pentadecyl salicylates, and their potassium salts, potassium 6-undecyl, 6-tridecyl, 6-pentadecyl salicylates and 6-undecyl catechol, also the cause of contact dermatitis problem.52Marchantia polymorpha and Metzgeria furcata also possess the allergenic contact dermatitis activity but their allergens still have not been isolated yet.37, 53
7. Conclusion
The data mentioned in Table1 containing 50 medicinal bryophytes which are very popular remedy among tribal people of different part of world. These tiny creatures are widely used by different tribal communities in Africa, America, Europe, Poland, Argentina, Australia, New Zealand, Turkey, Japan, Taiwan, Pakistan, China, Nepal and different parts of the South, North and East India. On the basis of Table1, it is concluded that major bryophytes used in hepatic disorders are liverworts apart from this; some species of moss are used in hepatic disorders. Some of the bryophytes species that are used in hepatic disorder are Frullania tamarisci, Reboulia hemisphaerica, Conocephalum conicum, Marchantia polymorha and mosses Sphagnum spp., Weissia controversa, Funaria hygrometrica, Bryum argenteum, Rhodobryum roseum, Climacium dendroides and Polytrichum commune. The peat moss species Sphagnum teres is very popular to treat various eye diseases in China. The moss Rhodobryum giganteum and R.roseum are widely used within China for cardiovascular disease and nervous prostrations. Polytrichum commune is used as an antipyretic, diuretic and hemostatic and Haplocaldium microphyllum is applied for tonsillitis, bronchitis, timpanists and cystitis. Despite the ethno-medicinal property Sphagnum spp. are used in surgical dressing because of better and faster absorption.
The plant derived natural products occupy an important place in the area of cancer chemotherapy because of minimal side effects. In this context Polytrichum commune play very significant role especially for the therapy of lymphocytic leukemia, Furthermore, it has been found that P.ohioense and P.pallidisetum also show cytotoxicity against the 9PS murine leukemia and several other tumor cell lines. Marchantia palacea, M.polymorpha, and M.tosana, Riccardia multifida, Radula perrottetii all show cytotoxicity against the leukemic KB cell.
8. Future prospective
Currenlty, scientific research on medicinal use of bryophytes is being carried out in most pharmaceutical laboratories, research institutes and universities. The current research is going on the active ingredients of medicinal bryophytes are used in curing diseases such as hepatic disorders, skin diseases, cardiovascular diseases, and many more other ailments. Another area of research is directed towards the discovery of new kinds of drugs from the medicinal bryophytes which have not been explored so far. The drugs obtained from the traditional medicine, like Ayurveda, Unani and Siddha system need to be further evaluated and validated more scientifically. The Council of Scientific and Industrial Research (CSIR), New Delhi, is involved in the validation of about 350 formulations of traditional medicines for different pharmacological activities.54 This new trend of evaluation and validation of traditional practices with modern knowledge provides significant opportunities for newer drug discoveries and would be an effective strategy for the improvement of human health care.
Disclosure/Conflict of interest statement
None of the authors of this paper has a financial or personal relationship with other people or organizations that could inappropriately influence or bias the content of the paper. It is to specifically state that “No Competing interests are at stake and there is No Conflict of Interest” with other people or organizations that could inappropriately influence or bias the content of the paper. The manuscript has not been published previously by any of the authors and/or is not under consideration for publication in another journal at the time of submission.
Footnotes
Peer review under responsibility of The Center for Food and Biomolecules, National Taiwan University.
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