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Tripathi Pallavi,Arora Sandeep,Gupta Rajiv,Mali Prabha R
International Research Journal of Pharmacy , 2011,
Abstract: The leaf extracts of Pistia stratiotes were subjected to screening of antidiabetic and diuretic activity in rats. The oral administration of the extracts (200mg/kg body weight) produced significant antihyperglycemic (P*<0.001) action, as well as Diuretic action. The antihyperglycemic action of the extracts may be due to the blocking of glucose absorption. From the obtained result it was concluded that Pistia stratiotes possess potent antidiabetic and diuretic activity.
Evaluation of Anthelmintic Activity of Pistia stratiotes Linn  [cached]
H. K. Sundeep Kumar,Anindya Bose,Arundhuti Raut,Sujit Kumar Sahu
Journal of Basic and Clinical Pharmacy , 2010,
Abstract: The ethanolic extract of the plant Pistia stratiotes (Araceae) was investigated for activity against Indian earthworms Pheretima posthuma and nematode Ascardi galli. Various concentrations (10, 20, 50 mg/ml) of ethanolic extract were tested, which involved determination of time of paralysis and time of death of the worms. It was compared with Piperazine citrate (15 mg/ml) and Albendazole(20 mg/ml) as standard reference and normal saline as control. The study indicated the potential usefulness of Pistia stratiotes against earthworm infections
Pharmacognostic studies of the leaf and stolon of Pistia stratiotes Linn.  [cached]
Omprakash K K,Rathinamala R,Rajasekaran R,Sasikala Ethirajulu
International Journal of Ayurvedic Medicine , 2011,
Abstract: Pistia stratiotes Linn. is found in ponds and streams throughout India. The plant has demulcent, refrigerant activities and useful in the treatment of dysuria. It is considered as antiseptic, antitubercular and antidysenteric. It is used in the preparation of inorganic Ayurveda and Siddha medicaments. The leaves are used in eczema, leprosy, ulcer, piles, and syphilis. The present study deals with the various pharmacognostical examinations include the morphological, microscopical characters and physiochemical characters like ash values and extractive values. The preliminary phytochemical screening is also carried out and it is revealed the presence of various phytoconstituents like Steroid, Triterpenoid, Phenol, Flavanoid, Tanin, Alkaloid, Glycoside and Saponin. These data's could be used to standardize the plant which is essential and is need of the hour.
First Attempt at and Early Results on the Biological Control of Pistia stratiotes L. in South Africa  [cached]
Catharina J Cilliers
Koedoe : African Protected Area Conservation and Science , 1987, DOI: 10.4102/koedoe.v30i1.500
Abstract: Although Pistia stratiotes L. (water lettuce) is not an important weed in the Republic of South Africa, the host-specific weevil Neohydronomus pulchellus Hustache was imported for the biological control of this weed. The weevil was released onto a dense infestation of P. stratiotes of several years standing on a pan in the Pafuri area in December 1985. By September 1986 the weevils had already destroyed most of the weed and in October 1986 the weed was under biological control at this site.
Khan Md. Ahad Ali,Prasanta Paul,Islam Md. Torequl,Biswas Nripendra Nath
International Research Journal of Pharmacy , 2011,
Abstract: In phytochemical screening of the ethanolic extract of Pistia stratiotes L. aerial part anthraquinone glycosides, cardiac glycosides, cyanogenetic glycosides, flavonoids, steroids, tannins, carbohydrates were found to be present. The LC50 and LC90 were 1.8μg/ml & 2.07μg/ml respectively in brine shrimp lethality assay. It was to have produced significant zones of inhibition against gram positive Bacillus cereus, B. subtilis, Staphylococcus aureus, gram negative Escherichia coli, Salmonella typhi, Proteus mirabilis and yeast Candida albicans and Rhodotorula rubra, which were comparable with standard antimicrobial drugs tetracycline, vancomicin and nystatin. In acute-toxicity test in mice LD50 was 850mg/kg body weight (i.p). In CNS depressant tests; hole cross, open field, beam walking and thiopental sodium induced sedative test in mice it significantly (p<0.005, p<0.001) decreased the locomotor activity in mice. The extract showed significant (p<0.005, p<0.001) antinociceptive activity when subjected to hot plate, tail immersion and acetic acid-induced writhing tests in mice.
Feasibility of Producing Selenium-Enriched Water Lettuce (Pistia stratiotes L.)  [PDF]
Anut Chantiratikul,Panida Atiwetin,Piyanete Chantiratikul
Journal of Biological Sciences , 2008,
Abstract: The feasibility of producing selenium-enriched water lettuce (Pistia stratiotes L.) was studied by cultivating water lettuce in Hoagland's solution containing 0, 20, 40, 60 and 80 mg Se from sodium selenite/L. There were 4 replicates in each Se concentration. Each replicate consisted of 30 plants of water lettuce. Three plants of water lettuce in each replicate were sampled on day 0, 1, 2, 3 and 4 of the experiment. The samples were washed with deionized water, separated for leaves and roots and finally dried at 65 °C. Prior to Se determination, leaf or root samples were pooled by replicate. The finding revealed that Se concentrations in leaves and roots of water lettuce increased significantly (p<0.05) with increasing Se concentration in Hoagland's solution and day of cultivation. However, Se concentration in leaves was lower than that of roots. Water lettuce cultivated in the solution containing 60 to 80 mg Se L-1 exhibited the yellow leaves and died in day 2 and 3. Therefore, the appropriate Se concentration and duration for producing Se-enriched water lettuce were 20 to 40 mg Se L-1 and 2 to 3 days of cultivation. The leaves of water lettuce cultivated in those conditions contained 11.14-13.50 and 21.06-29.55 mg Se kg-1, respectively.
Temperature and pH conditions for mycelial growth of Agaricus brasiliensis on axenic cultivation/ Condi es de temperatura e pH para o crescimento micelial de Agaricus brasiliensis em cultivo axênico  [cached]
Nelson Barros Colauto,Patrícia Midori Aizono,Lis Ribeiro Magalh?es de Carvalho,Luzia Doretto Paccola-Meirelles
Semina : Ciências Agrárias , 2008,
Abstract: Few studies have been done to determine Agaricus brasiliensis Wasser et al. (A. blazei; A. subrufescens) basic mycelial growth characteristics on axenic cultivation. This study aimed to determine the optimal temperature and initial pH for mycelial growth of A. brasiliensis on malt extract agar medium to develop axenic cultivation techniques. Studied initial pH values for mycelial growth were adjusted to 3.0, 4.0, 5.0, 5.5, with HCl, 6.0, 7.0, 8.0, with NaOH, and again 7.0 and 8.0, with CaCO3. Studied temperatures for mycelial growth were 22 oC, 25 oC, 28 oC, 31 oC and 34 oC. It was concluded that A. brasiliensis can grow in axenic cultivation at temperature range from 22 oC to 34 oC, with optimal temperature range from 28 oC to 31 oC and optimal temperature value of 30.5 oC ± 0.3 oC. It also grows in initial pH range from 4.0 to 7.0, adjusted with HCl or NaOH but not CaCO3, with optimal initial pH range from 5.5 to 6.0 and optimal initial pH value of 5.56 ± 0.05. Mycelial growth is inhibited with pH of 3.0 or lower, 8.0 or higher, or when CaCO3 is used to adjust pH in the substratum to 7.0 or higher. Poucos estudos foram desenvolvidos para determinar as condi es básicas de crescimento micelial do fungo Agaricus brasiliensis Wasser et al. (A. blazei, A. subrufescens). O objetivo deste trabalho foi determinar a faixa ótima de temperatura e pH para o crescimento micelial, em agar-extrato-de-malte, de A. brasiliensis, visando o desenvolvimento de técnicas de cultivo axênica. Os valores de pH estudados foram 3,0, 4,0, 5,0 e 5,5, ajustados com HCl, 6,0, 7,0 e 8,0, ajustados com NaOH, e 7,0 e 8,0, ajustados com CaCO3. As temperaturas de crescimento estudadas foram 22 oC; 25 oC; 28 oC; 31 oC e 34 oC. Concluiu-se que A. brasiliensis cresce em uma faixa de temperatura ótima de 28 oC a 31 oC, com valor ótimo de temperatura de 30,5 oC ± 0,3 oC. A faixa de pH inicial ótimo no substrato é de 5,5 a 6,0 e o valor de pH inicial ótimo é de 5,56 ± 0,05. O crescimento do micélio é inibido com pH de 3,0 ou inferior, 8,0 ou superior, ou quando CaCO3 é utilizado para ajuste do pH para 7,0 ou superior.
Estimativa da área foliar de plantas daninhas de ambiente aquático: Pistia stratiotes
Carvalho, L.B.;Souza, M.C.;Bianco, M.S.;Bianco, S.;
Planta Daninha , 2011, DOI: 10.1590/S0100-83582011000100008
Abstract: leaf area is a major characteristic used to evaluate plant growth. this work aimed to determine a mathematical equation to estimate the leaf area of pistia stratiotes in function of the linear measures of the leaf blades. the experiment was carried out at s?o paulo state university,in jaboticabal-sp, brazil. length (l), width (w) and leaf area (la) of one hundred leaves collected from a natural environment were electronically measured. la and l × w data were submitted to linear regression analysis, determining a mathematical equation to estimate the leaf area of the species. anova on linear regression and correlation analysis between the obtained and estimated leaf area values were significant (p<0.01). leaf area of p. stratiotes may be estimated by the equation: la = 0.79499 (lw).
Influence of chromium salts on increased lipid peroxidation and differential pattern in antioxidant metabolism in Pistia stratiotes L
Upadhyay, RishiKesh;Panda, Sanjib Kumar;
Brazilian Archives of Biology and Technology , 2010, DOI: 10.1590/S1516-89132010000500018
Abstract: in this work, the changing effect of different concentrations (0, 0.01, 0.1, 1, 10mm) of hexavalent and trivalent chromium on different biochemical parameters along with antioxidant enzymes was investigated on water lettuce (pistia stratiotes l.) in order to know the possible involvement of this metal in oxidative injury, besides the activities of antioxidant enzymes leading to biochemical and oxidative aberration induced by elevated concentrations. both in roots and shoots, cr produced a significant increase in enzymic and non-enzymic antioxidants, except in catalase (cat) activity where a strong accumulation of hydrogen peroxide was indicated, suggesting an imposition of oxidative stress. the observation showed an uptake of chromium by p. stratiotes l. as well as increase in activity of antioxidants, as the concentrations and their duration of treatment increased. the activity of antioxidative enzymes determined the steady-state levels of ros in the cell. the augmentation of antioxidative defense plays a key role in regulating the oxidative stress. this pointed to the possibility in induction of oxidative stress, with the increasing lipid peroxidation, followed by a differential pattern in antioxidant metabolisms by chromium ions in p. stratiotes l.
Changes in antioxidant enzyme activities in Eichhornia crassipes (Pontederiaceae) and Pistia stratiotes (Araceae) under heavy metal stress
Odjegba,V.J; Fasidi,I.O;
Revista de Biología Tropical , 2007,
Abstract: whole plants of eichhornia crassipes and pistia stratiotes were exposed to various concentrations (0, 0.1, 0.3, 0.5, 1.0, 3.0 and 5.0 mm) of 8 heavy metals (ag, cd, cr, cu, hg, ni, pb and zn) hydroponically for 21 days. spectrometric assays for the total activity of catalase, peroxidase, and superoxide dismutase in the leaves were studied. at the end of the experimental period, data referred to metal treated plants were compared to data of untreated ones (control). heavy metals increased the activity of catalase, peroxidase and superoxide dismutase in both species and there was differential inducement among metals. overall, zn had the least inducement of antioxidant enzymes in both species while hg had the highest inducement. the increase in antioxidant enzymes in relation to the control plants was more in e. crassipes than p. stratiotes. the results showed that e. crassipes tolerated higher metal concentrations in a greater number of metals than p. stratiotes. rev. biol. trop. 55 (3-4): 815-823. epub 2007 december, 28.
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