Biology:Pistia

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Short description: Species of aquatic flowering plant in the family Araceae

Pistia
Pistia stratiotes0.jpg
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Araceae
Subfamily: Aroideae
Tribe: Pistieae
Genus: Pistia
L.[3]
Species:
P. stratiotes
Binomial name
Pistia stratiotes
L.[2]
Pistia distribution.svg
Range of the genus Pistia
Synonyms[4]

Pistia is a genus of aquatic plants in the arum family, Araceae. It is the sole genus in the tribe Pistieae which reflects its systematic isolation within the family.[5] The single species it comprises, Pistia stratiotes, is often called water cabbage, water lettuce, Nile cabbage, or shellflower. Its native distribution is uncertain but is probably pantropical; it was first scientifically described from plants found on the Nile near Lake Victoria in Africa.[6] It is now present, either naturally or through human introduction, in nearly all tropical and subtropical fresh waterways and is considered an invasive species as well as a mosquito breeding habitat. The genus name is derived from the Greek word πιστός (pistos), meaning "water", and refers to the aquatic nature of the plants.[7] The specific epithet is also derived from a Greek word, στρατιώτης, meaning "soldier", which references the sword-shaped leaves of some plants in the Stratiotes genus.[8]

Description

19th-century illustration of Pistia stratiotes

Pistia stratiotes is a perennial monocotyledon with thick, soft leaves that form a rosette.[9] It floats on the surface of the water, its roots hanging submersed beneath floating leaves. The leaves can measure 2 – 15 cm long and are light green, with parallel venations and wavy margins.[9] The surface of the leaves is covered in short, white hairs which form basket-like structures that can trap air bubbles and increase the plant's buoyancy. The spongy parenchyma with large intercellular spaces in the leaves also aids the plant in floating.[10] The flowers are dioecious, lack petals, and are hidden in the middle of the plant amongst the leaves. Pistia stratiotes has a spadix inflorescence, containing one pistillate flower with one ovary and 2–8 staminate flowers with two stamens.[11] The pistillate and carpellate flowers are separated by folds in the spathe, where the male flowers are located above the female flowers.[5] Oval, green berries with ovoid seeds form after successful fertilization. The plant undergoes asexual reproduction by propagating through stolons, yet evidence of sexual reproduction has also been observed in the ponds of Southern Brazil.[12]

Pistia stratiotes are found in slow-moving rivers, lakes, and ponds. The species displays optimal growth in the temperature range of  22–30 °C, but can endure extreme temperatures up to 35 °C.[13] As a result, Pistia stratiotes do not grow in colder temperatures, beyond the tropics of Cancer and Capricorn. The species also require slightly acidic water in the pH range of 6.5–7.2 for optimal growth.[13]

Invasion

Water lettuce is among the world's most productive freshwater aquatic plants and is considered an invasive species.[14] The species can be introduced to new areas by water dispersal, fragmentation, and hitchhiking on marine transportation or fishing equipment.[15] The invasion of Pistia stratiotes in the ecosystem can lead to environmental and socio-economic ramifications to the community it serves. In waters with high nutrient content, particularly those that have been contaminated with human loading of sewage or fertilizers, water lettuce can exhibit weedy overgrowth. It may also become invasive in hydrologically altered systems such as flood control canals and reservoirs.[16] The severe overgrowth of water lettuce can block gas exchange in the surface water, creating hypoxic conditions and eliminating or disrupting various native marine organisms.[17] Blocking access to sunlight, large mats of water lettuce can shade native submerged plants and alter communities relying on these native plants as a source of food.[18] The growth of these mats can also get tangled in boat propellers and create challenges for boaters or recreational fishermen.[19]

Pistia stratiotes feature in the life cycles of certain insect vectors for malaria and filariasis.[20] Mosquitoes of the genus Mansonia can lay their eggs under the leaves of aquatic plants, such as Pistia stratiotes. Twenty-four hours later, the emerging larvae attach to the plant's roots using its siphon tube for respiration. Within a week, larvae can develop into adult mosquitos, making Pistia stratiotes a potential breeding ground for vectors of infectious disease.[21] The moth Samea multiplicalis also uses Pistia stratiotes as its primary host plant. Eggs are laid among leaves and stems of the host plant and larvae hatch and feed intensively as they develop.[22]

Control

  1. Chemical control: Herbicides have been effective in controlling Pistia stratiotes: diquat, glyphosate, terbutryn, 2,4-D, among many others.[23] Yet, the use of herbicides must be critically assessed to prevent negative environmental impacts and possible toxic effects on marine life and human health.[24]
  2. Physical control: Pistia stratiotes can be controlled with mechanical harvesters that remove the water lettuce from the infested waters and transport it to disposal onshore.[25] Larger infestations can be removed with the aid of hydraulic excavators and tractors. To prevent the re-growth of Pistia stratiotes colonies, a long-term maintenance program should be implemented.
  3. Biological control: Two species of insects are also being used as a biological control. Adults and larvae of the South American weevil Neohydronomous affinis feed on Pistia leaves, as do the larvae of the moth Spodoptera pectinicornis from Thailand.[26][27] Both are proving to be useful tools in the management of Pistia stratiotes through the experimental recovery of benthic communities with hypoxic conditions.[28]

Range

The center of origin of Pistia stratiotes has long been a source of debate.[29] Nativity to northern Africa is indicated by Egyptian hieroglyphics and reports of plants meeting the description of Pistia by Greek botanists, Dioscorides and Theophrastus in the Nile River.[6] In addition, the co-evolution of Pistia stratiotes with various insects native to Brazil and Argentina, such as the water lettuce weevil,[30] indicates a long-term native tenure in South America.[31] Fossil specimens dating back to the late Pleistocene (~12,000 BP) and early Holocene (~3,500 BP) period are reported from Florida, indicating a native presence in the southeastern United States.[32] Recent genetic evidence also suggests that Pistia is not actually a monotypic genus, as had been long assumed.[33] Instead, Pistia appears to be composed of at least three genetically distinct, but morphologically and ecologically similar, species at a global scale.[33]

Temperate occurances

Though Pistia stratiotes is intollerant of cold temperatures, it has been recorded growing at least temporarily in temperate areas of North America and Europe.[4][34] In the United States north of the Gulf of Mexico it has been found growing in Colorado, Connecticut, Delaware, Illinois, Kansas, Maryland, Michigan, Minnesota, Missouri, New York, North Carolina, Ohio, Rhode Island, South Carolina, and Wisconsin. One of these occurances, in Idaho, survives in an area of a river fed by a hot spring. The rest are thought either to be completely eradicated by cold weather or possibly to survive by seed production.[35]

Fossil record

Pistia-like plants appear in the fossil record during the Late Cretaceous epoch in rock strata from the western interior of North America. They were first described as †Pistia corrugata by Leo Lesquereux in 1876 based on specimens from the Almond Formation of Wyoming (late Campanian age). However, based on more complete specimens from the Campanian Dinosaur Park Formation of southern Alberta, Canada , and other areas, they were redescribed as a separate genus, †Cobbania, primarily due to differences in leaf morphology.[36][37] Younger fossils attributed to Pistia stratiotes have described from Eocene strata in the southeastern United States,[38] and 350 fossil seeds of †Pistia sibirica have been described from middle Miocene strata of the Fasterholt area near Silkeborg in Central Jutland, Denmark . Fossils of this species have also been described from the Oligocene and Miocene of Western Siberia and from the Miocene of Germany .[39]

A specimen of Pistia from the Florida peninsula dating from at least 3,550 years Before Present and a report of Holocene Pistia fossils from a lake in south central Florida are consistent with genetic evidence indicating that some varieties of Pistia stratiotes are native to the southeastern United States.[33][38][40]

Uses

Consumption

While considered edible, Pistia stratiotes is not palatable as it is rich in calcium oxalate crystals that are bitter in taste. Nevertheless, there are records of the plant being utilized as famine food in India during the Great Famine of 1876–1878.[41]

The Hausa people of Nigeria used the ash of the plant as a substitute for salt due to its high concentration of potassium chloride, a mineral salt.[20] This salt substitute, also called zakankau, was of high importance, especially when imported salt was unavailable.[42]

Caution is advised when consuming Pistia stratiotes, as the plant is a hyperaccumulator, and can absorb and accumulate toxic heavy metals present in its environment.[43] The presence of high concentrations of calcium oxalate crystals can induce various health concerns, such as inhibited mineral absorption and kidney stones.[44][45]

In Singapore and Southern China, Pistia stratiotes is commonly grown or collected as animal feed for ducks and pigs.[46] Water lettuce is also considered an alternative for poultry feed in Indonesia due to its high content of crude protein.[47]

Medical treatment

There are various medical uses of Pistia stratiotes throughout regions in Asia and Africa. In Nigeria, the dried leaves are prepared into a powder form and are applied to wounds and sores for disinfection.[48] A similar use is present in Indian traditional medicine, where the powdered leaf is applied to syphilitic eruptions and skin infections.[49] In Nigeria and Gambia, the leaf is infused in water to create an eyewash to treat allergic conjunctivitis.[50] The eyewash is known to have a cooling and analgesic effect. Therefore, the plant is commonly called 'eye-pity' in Africa.[51] In addition, the leaves of Pistia stratiotes can be burned into ash, and in Indian and Nigerian traditional medicine, the ash is used in treating ringworm infections of the scalp.[49]

Medicinal properties

  • Anti-inflammatory properties: Extractions of the leaves of P. stratiotes reduces mast infiltration and degranulation in allergic reactions and presents anti-inflammatory properties.[50][52] The ethanolic extracts have also been positively correlated with a reduction in inflammatory disorders, such as arthritis and fevers.[53]
  • Antifungal properties: With the popular use of Pistia stratiotes as a traditional treatment for ringworms, researchers have tested P. stratiotes methanolic extracts on dermatophyte fungi. The results of the studies depicted significant fungicidal activity on T. rubrum, T. mentagrophytes, and E. floccosum.[54][49]

Environmental remediation

The high sorption property of water lettuce makes it a great candidate for biodegradable oil sorbents in marine oil spills. Particularly, the leaves of Pistia stratiotes can efficiently absorb significant amounts of hydrocarbons due to its large surface area and hydrophobicity.[55]

As a hyper-accumulator, Pistia stratiotes has been studied as a potential candidate for wastewater treatment plants. The roots and leaves of the plant have been found to absorb excess nutrients and heavy metals, such as zinc, chromium, and cadmium in contaminated waters.[56]

Pistia stratiotes can be grown in water gardens to reduce harmful algal blooms and eutrophic conditions.[57] The plant is able to control the growth of algae by restricting light penetration in the water column and competing for nutrients, with significant uptake of phosphorus and ammonia nitrogen.[58]

See also

References

  1. ↑ Lansdown, R.V. (2019). "Pistia stratiotes". IUCN Red List of Threatened Species 2019: e.T168937A120126770. doi:10.2305/IUCN.UK.2019-2.RLTS.T168937A120126770.en. https://www.iucnredlist.org/species/168937/120126770. Retrieved 30 July 2023. 
  2. ↑ {{citation | mode = cs1 | title = Pistia | work = Germplasm Resources Information Network (GRIN) | url = | publisher = [[Organization:Agricultural Research ServAgricultural Research Service (ARS), United States Department of Agriculture (USDA) | access-date = 2011-09-30 }}
  3. ↑ "Genus: Pistia L". United States Department of Agriculture. 2006-02-23. http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?9449. 
  4. ↑ 4.0 4.1 "Pistia stratiotes L." (in en). Royal Botanic Gardens, Kew. http://www.plantsoftheworldonline.org/taxon/317684-2. 
  5. ↑ 5.0 5.1 Buzgo, Matyas (1994). "Inflorescence development of Pistia stratiotes (Araceae)". Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 115 (1): 557. doi:10.1186/1999-3110-55-30. PMID 28510972. 
  6. ↑ 6.0 6.1 Khare, C.P. (2007). "Pistia stratiotes Linn. Var. Cuneata Engl". Indian Medicinal Plants. p. 1. doi:10.1007/978-0-387-70638-2_1218. ISBN 978-0-387-70637-5. 
  7. ↑ Quattrocchi, Umberto (2000). CRC World Dictionary of Plant Names. III: M-Q. CRC Press. p. 2084. ISBN 978-0-8493-2677-6. https://books.google.com/books?id=kaN-hLL-3qEC. 
  8. ↑ "stratiotes". http://plantillustrations.org/epithet.php?id_epithet=201508&mobile=1&uhd=0. 
  9. ↑ 9.0 9.1 Schmid, Rudolf; Bown, D. (November 2000). "Aroids: Plants of the Arum Family". Taxon 49 (4): 839. doi:10.2307/1223991. ISSN 0040-0262. http://dx.doi.org/10.2307/1223991. 
  10. ↑ Neuenschwander, Peter; Julien, Mic H.; Center, Ted D.; Hill, Martin P. (2009), Muniappan, Rangaswamy; Reddy, Gadi V. P.; Raman, Anantanarayanan, eds., "Pistia stratiotes L. (Araceae)", Biological Control of Tropical Weeds Using Arthropods (Cambridge: Cambridge University Press): pp. 332–352, doi:10.1017/cbo9780511576348.017, ISBN 978-0-511-57634-8, https://www.cambridge.org/core/product/identifier/CBO9780511576348A025/type/book_part, retrieved 2021-12-06 
  11. ↑ "Pistia stratiotes L." (in en). EPPO Bulletin 47 (3): 537–543. December 2017. doi:10.1111/epp.12429. https://onlinelibrary.wiley.com/doi/10.1111/epp.12429. 
  12. ↑ Freitas Coelho, Flávia; Deboni, Liene; Santos Lopes, Frederico (2014-05-29). "Density-dependent reproductive and vegetative allocation in the aquatic plant Pistia stratiotes (Araceae)". Revista de Biología Tropical 53 (3–4): 369–376. doi:10.15517/rbt.v53i3-4.14599. ISSN 2215-2075. PMID 17354448. http://dx.doi.org/10.15517/rbt.v53i3-4.14599. 
  13. ↑ 13.0 13.1 Tamada, Katsuya; Itoh, Kazuyuki; Uchida, Yuko; Higuchi, Shunsuke; Sasayama, Daisuke; Azuma, Tetsushi (2014-10-27). "Relationship between the temperature and the overwintering of water lettuce (Pistia stratiotes) at Kowataike, a branch of Yodogawa River, Japan". Weed Biology and Management 15 (1): 20–26. doi:10.1111/wbm.12061. ISSN 1444-6162. http://dx.doi.org/10.1111/wbm.12061. 
  14. ↑ Muniappan, Rangaswamy; Reddy, Gadi; Raman, Anantanarayanan (2009). Biological Control of Tropical Weeds Using Arthropods. Cambridge University Press. pp. 332–352. doi:10.1017/CBO9780511576348.017. ISBN 9780511576348. 
  15. ↑ NOAA Great Lakes Environmental Research Laboratory. "NOAA National Center for Research on Aquatic Invasive Species (NCRAIS)". https://nas.er.usgs.gov/queries/greatlakes/FactSheet.aspx?Species_ID=1099. 
  16. ↑ Kasulo, V. 2000. The impact of invasive species in African lakes. In: The economics of biological invasions (eds. C. Perrings, M. Williamson and S. Dalmozzone). pp. 183–207. Cheltenham, UK: Edward Elgar.
  17. ↑ Wang, Jinqing; Fu, Guihua; Li, Weiyue; Shi, Ying; Pang, Jicai; Wang, Qiang; Lü, Weiguang; Liu, Change et al. (January 2018). "The effects of two free-floating plants (Eichhornia crassipes and Pistia stratiotes) on the burrow morphology and water quality characteristics of pond loach (Misgurnus anguillicaudatus) habitat". Aquaculture and Fisheries 3 (1): 22–29. doi:10.1016/j.aaf.2017.12.001. ISSN 2468-550X. http://dx.doi.org/10.1016/j.aaf.2017.12.001. 
  18. ↑ Ramey, Victor (2001). "Water Lettuce (Pistia stratiotes)". Center for Aquatic and Invasive Plants, University of Florida. http://plants.ifas.ufl.edu/node/328. 
  19. ↑ "Invasive Aquatic Plants" (in en-CA). https://www.invasivespeciescentre.ca/invasive-species/meet-the-species/invasive-aquatic-plants/. 
  20. ↑ 20.0 20.1 Gupta, R; Tripathi, P; Kumar, R; Sharma, AK; Mishra, A (2010). "Pistia stratiotes (Jalkumbhi)". Pharmacognosy Reviews 4 (8): 153–160. doi:10.4103/0973-7847.70909. ISSN 0973-7847. PMID 22228955. 
  21. ↑ Park, K. (2007). Park's Textbook of Preventive and Social Medicine (19th ed.). Jabalpur, India: Banarsidas Bhanot. 
  22. ↑ Wheeler, G.S; Halpern, M.D (1999). "Compensatory responses of Samea multiplicalis larvae when fed leaves of different fertilization levels of the aquatic weed Pistia stratiotes". Entomologia Experimentalis et Applicata 92 (2): 205–216. doi:10.1046/j.1570-7458.1999.00539.x. 
  23. ↑ Datta, Subhendu; Kumar, Ajit (2012). "Effect of Some Herbicides in Controlling the Floating Aquatic weeds" (in en). Diversification of Aquaculture. Narendra Publishing House. doi:10.13140/RG.2.1.4166.8967. http://rgdoi.net/10.13140/RG.2.1.4166.8967. 
  24. ↑ Blackburn, Robert D. (January 1963). "Evaluating Herbicides against Aquatic Weeds". Weeds 11 (1): 21–24. doi:10.2307/4040677. ISSN 0096-719X. http://dx.doi.org/10.2307/4040677. 
  25. ↑ "Pistia stratiotes L." (in en). EPPO Bulletin 47 (3): 537–543. 2017. doi:10.1111/epp.12429. ISSN 1365-2338. https://onlinelibrary.wiley.com/doi/abs/10.1111/epp.12429. 
  26. ↑ Harley, K. L. S.; Kassulke, R. C.; Sands, D. P. A.; Day, M. D. (September 1990). "Biological control of water lettuce, Pistia stratiotes [Araceae by Neohydronomus affinis [Coleoptera: Curculionidae]"] (in en). Entomophaga 35 (3): 363–374. doi:10.1007/BF02375260. ISSN 0013-8959. http://link.springer.com/10.1007/BF02375260. 
  27. ↑ Aphrodyanti, Lyswiana; Rosa, Helda Orbani; Samharinto, Samharinto (2017-03-21). "The potential of Spodoptera pectinicornis in controlling water lettuce (Pistia stratiotes) in field". Tropical Wetland Journal 3 (1): 10–16. doi:10.20527/twj.v3i1.40. ISSN 2654-279X. http://twj.ulm.ac.id/index.php/twj/article/view/40. 
  28. ↑ Coetzee, J. A.; Langa, S. D. F.; Motitsoe, S. N.; Hill, M. P. (2020-08-03). "Biological control of water lettuce, Pistia stratiotes L., facilitates macroinvertebrate biodiversity recovery: a mesocosm study". Hydrobiologia 847 (18): 3917–3929. doi:10.1007/s10750-020-04369-w. ISSN 0018-8158. http://dx.doi.org/10.1007/s10750-020-04369-w. 
  29. ↑ Cilliers, Catharina J. (1987-10-21). "First Attempt at and Early Results on the Biological Control of Pistia stratiotes L. in South Africa" (in en). Koedoe 30 (1): 35–40. doi:10.4102/koedoe.v30i1.500. ISSN 2071-0771. https://koedoe.co.za/index.php/koedoe/article/view/500. 
  30. ↑ https://www.lsuagcenter.com/topics/environment/invasive%20species/water-lettuce/biological-control#:~:text=The%20water%20lettuce%20weevil%20(Neohydronomus,US%20in%201987%20%5B1%5D.
  31. ↑ D., Center, Ted (2002). Insects and other arthropods that feed on aquatic and wetland plants. U.S. Dept. of Agriculture, Agricultural Research Service. OCLC 54673566. http://worldcat.org/oclc/54673566. 
  32. ↑ Evans, Jason M. (2013). "Pistia stratiotes L. in the Florida Peninsula: Biogeographic Evidence and Conservation Implications of Native Tenure for an ′Invasive′ Aquatic Plant". Conservation and Society 11 (3): 233. doi:10.4103/0972-4923.121026. ISSN 0972-4923. 
  33. ↑ 33.0 33.1 33.2 Madeira, Paul T.; Dray, F. Allen; Tipping, Philip W. (2022-08-01). "The phytogeography and genetic diversity of the weedy hydrophyte, Pistia stratiotes L." (in en). Biological Invasions 24 (8): 2613–2634. doi:10.1007/s10530-022-02798-3. ISSN 1573-1464. https://doi.org/10.1007/s10530-022-02798-3. 
  34. ↑ Hassler, Michael (16 January 2024). "Pistia". https://www.worldplants.de/world-plants-complete-list/complete-plant-list#plantUid-33297. 
  35. ↑ "Water Lettuce (Pistia stratiotes) Ecological Risk Screening Summary". 30 August 2018. https://www.fws.gov/sites/default/files/documents/Ecological-Risk-Screening-Summary-Water-Lettuce.pdf. 
  36. ↑ Stockey, R.A.; Rothwell, G.R.; Johnson, K.R. (2007). "Cobbania corrugata gen. et comb. nov. (Araceae): A floating aquatic monocot from the Upper Cretaceous of western North America". American Journal of Botany 94 (4). doi:10.3732/ajb.94.4.609. PMID 21636430. 
  37. ↑ Stockey, R.A.; Rothwell, G.R.; Johnson, K.R. (2016). "Evaluating relationships among floating aquatic monocots: A new species of Cobbania (Araceae) from the Upper Maastrichtian of South Dakota". International Journal of Plant Sciences 177 (8). doi:10.1086/688285. 
  38. ↑ 38.0 38.1 Evans, Jason M. (July 1, 2013). "Pistia stratiotes L. in the Florida Peninsula: Biogeographic Evidence and Conservation Implications of Native Tenure for an 'Invasive' Aquatic Plant". Conservation and Society 11 (3): 233. doi:10.4103/0972-4923.121026. http://www.conservationandsociety.org/article.asp?issn=0972-4923;year=2013;volume=11;issue=3;spage=233;epage=246;aulast=Evans;type=0. 
  39. ↑ Else Marie Friis (1985). Angiosperm Fruits and Seeds from the Middle Miocene of Jutland (Denmark). 24:3. The Royal Danish Academy of Sciences and Letters. https://www.royalacademy.dk/Publications/Low/369_Friis,%20Else%20Marie.pdf. 
  40. ↑ Berry, E.W. (1917). "The fossil plants from Vero, Florida". The Journal of Geology 25 (7): 661–666. doi:10.1086/622533. Bibcode: 1917JG.....25..661B. 
  41. ↑ Les, Donald H. (2020-05-11), "Monocotyledons I", Aquatic Monocotyledons of North America (CRC Press): pp. 3–214, doi:10.1201/9781315166339-2, ISBN 9781315166339, http://dx.doi.org/10.1201/9781315166339-2, retrieved 2021-12-06 
  42. ↑ "Hygrophila auriculata in Global Plants on JSTOR". https://plants.jstor.org/compilation/hygrophila.auriculata. 
  43. ↑ Lu, Qin; He, Zhenli L.; Graetz, Donald A.; Stoffella, Peter J.; Yang, Xiaoe (July 2011). "Uptake and distribution of metals by water lettuce (Pistia stratiotes L.)". Environmental Science and Pollution Research International 18 (6): 978–986. doi:10.1007/s11356-011-0453-0. ISSN 1614-7499. PMID 21287283. https://pubmed.ncbi.nlm.nih.gov/21287283/. 
  44. ↑ "Water Lettuce". 19 March 2012. http://www.eattheweeds.com/water-lettuce/. 
  45. ↑ Kumar, Parveen; Patel, Mikita; Oster, Robert A.; Yarlagadda, Vidhush; Ambrosetti, Adam; Assimos, Dean G.; Mitchell, Tanecia (2021). "Dietary Oxalate Loading Impacts Monocyte Metabolism and Inflammatory Signaling in Humans". Frontiers in Immunology 12: 105. doi:10.3389/fimmu.2021.617508. ISSN 1664-3224. PMID 33732242. 
  46. ↑ "Handbook of Utilization of Aquatic Plants". https://www.fao.org/3/x6862e/X6862E08.htm. 
  47. ↑ "Use of Pistia stratiotes in diets of Kampong chicken". http://www.lrrd.org/lrrd32/7/agus32113.html. 
  48. ↑ Ajibesin, Kola' Kayode (2012-11-25). "Ethnobotanical Survey of Plants Used for Skin Diseases and Related Ailments in Akwa Ibom State, Nigeria" (in en). Ethnobotany Research and Applications 10: 463–522. ISSN 1547-3465. https://ethnobotanyjournal.org/index.php/era/article/view/588. 
  49. ↑ 49.0 49.1 49.2 Shyamsundar, D; Premkumar, VG (2005). "Antidermatophytic activity ofPistia stratiotes". Indian Journal of Pharmacology 37 (2): 127. doi:10.4103/0253-7613.15116. ISSN 0253-7613. 
  50. ↑ 50.0 50.1 Koffuor, GeorgeAsumeng; Kyei, Samuel; Asiamah, EmmanuelA; Atobiga, ClementNsobire; Awuah, Agnes; Abokyi, Samuel (2014). "Antiallergic effect of an aqueous leaf extract of Pistia stratiotes in murine model of ovalbumin-induced allergic conjunctivitis". Pharmacognosy Research 6 (4): 274–279. doi:10.4103/0974-8490.138243. ISSN 0974-8490. PMID 25276062. 
  51. ↑ "Pistia stratiotes Linn. [family ARACEAE on JSTOR"]. https://plants.jstor.org/stable/10.5555/al.ap.upwta.1_447. 
  52. ↑ Koffuor, G. A.; Kyei, S.; Woode, E.; Ekuadzi, E.; Ben, I. O. (2012). "Possible mechanism of anti-inflammatory activity and safety profile of aqueous and ethanolic leaf extracts of Pistia stratiotes Linn (Araceae)" (in en). Journal of the Ghana Science Association 14 (1): 69–81. ISSN 0855-3823. https://www.ajol.info/index.php/jgsa/article/view/84194. 
  53. ↑ Koffuor, George; Kyei; Boampong (March 2012). "Antiarthritic effect of aqueous and ethanolic leaf extracts of Pistia stratiotes in adjuvant-induced arthritis in Sprague-Dawley rats". Journal of Experimental Pharmacology 4: 41–51. doi:10.2147/jep.s29792. ISSN 1179-1454. PMID 27186115. 
  54. ↑ Gupta, Arti; Singh, Nagendra Pratap (2021) (in en). Fungal Diseases in Animals: From Infections to Prevention. Springer Nature. ISBN 978-3-030-69507-1. https://books.google.com/books?id=W380EAAAQBAJ&dq=fungi+pistia+ringworm&pg=PA43. 
  55. ↑ Gaballah, M. S.; Ismail, K.; Beltagy, A.; Zein Eldin, A. M.; Ismail, M. M. (May 2019). "Wastewater Treatment Potential of Water Lettuce (Pistia stratiotes) with Modified Engineering Design". Journal of Water Chemistry and Technology 41 (3): 197–205. doi:10.3103/s1063455x1903010x. ISSN 1063-455X. http://dx.doi.org/10.3103/s1063455x1903010x. 
  56. ↑ Rodrigues, Ana Carolina Dornelas; do Amaral Sobrinho, Nelson Moura Brasil; dos Santos, Fabiana Soares; dos Santos, André Marques; Pereira, Ana Carolina Callegario; Lima, Erica Souto Abreu (2017-03-28). "Biosorption of Toxic Metals by Water Lettuce (Pistia stratiotes) Biomass". Water, Air, & Soil Pollution 228 (4): 156. doi:10.1007/s11270-017-3340-6. ISSN 0049-6979. Bibcode: 2017WASP..228..156R. http://dx.doi.org/10.1007/s11270-017-3340-6. 
  57. ↑ Ali, Esmat F.; Galal, Tarek M.; Hassan, Loutfy M.; Al-Yasi, Hatim M.; Dakhil, Mohammed A.; Eid, Ebrahem M. (2021-01-01). "Seasonal potential of Pistia stratiotes in nutrient removal to eliminate eutrophication in Al-Sero Drain (South Nile Delta, Egypt)". Journal of Freshwater Ecology 36 (1): 173–187. doi:10.1080/02705060.2021.1915397. ISSN 0270-5060. http://dx.doi.org/10.1080/02705060.2021.1915397. 
  58. ↑ Wu, Xiang; Wu, Hao; Chen, Junren; Ye, Jinyun (2013-05-08). "Effects of allelochemical extracted from water lettuce (Pistia stratiotes Linn.) on the growth, microcystin production and release of Microcystis aeruginosa". Environmental Science and Pollution Research 20 (11): 8192–8201. doi:10.1007/s11356-013-1783-x. ISSN 0944-1344. PMID 23653319. http://dx.doi.org/10.1007/s11356-013-1783-x. 

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