Powdery mildews on over 40 plants in Bangalore were screened during July-December of 2003~2008. Isolates from mycoparasitised Oidium caesalpiniacearum of Bauhinia purpurea comprised Lasiodiplodia theobromae, in addition to Ampelomyces quisqualis. Koch's postulates were satisfied to establish the mycoparasitism of L. theobromae. This is the first report that L. theobromae acts as a mycoparasite of a powdery mildew.
Bauhinia

The research advances based on the related references were summarized in the last thirty years. Bauhinia contained many kinds of chemical constituents, primarily including flavanoids, steroids, terpenoid and so on, some of them were firstly obtained from the nature. Many plants of the Bauhinia are used in traditional medicine for their interesting biological activities such as antidiabetic, antiinflammatory, antimicrobial, analgesic, astringent and diuretic effects. This paper gives an overview of phytochemical and pharmacological research in Bauhinia, and it has been classified accordding to the chemical structure characteristics. To provide more material to draw on for further development and utilization resources of Bauhinia.
Bauhinia ; chemistry ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Phytotherapy

OBJECTIVETo study the chemical constituents of Bauhinia glauca subsp. pernervosa.

METHODThe coulis of B. glauca subsp. pernervosa were extracted with 95% EtOH at room temperature. The compounds were isolated and separated by chromatographic techniques, and structures were identified by spectroscopic methods.

RESULTSeven chalcones were isolated and identified: butein-4-methyl ether (1), isoliquiritigenin (2), butein (3), isoliquiritigenin-2'-methyl ether (4), 2',4'-dihydroxychalcone (5), isoliquiritigenin-4-methyl ether (6), 4-hydroxy-2',4'-dimethoxychalcone (7).

CONCLUSIONCompounds 1, 3, and 7 were isolated from the genus Bauhinia for the first time, the other compounds were obtained from this plant for the first time.

Bauhinia ; chemistry ; Chalcones ; chemistry ; isolation & purification ; Drugs, Chinese Herbal ; chemistry ; isolation & purification

OBJECTIVETo study the chemical constituents of Bauhinia aurea.

METHODThe compounds were isolated with column chromatography. The structures were determined by MS and NMR spectroscopic techniques.

RESULTNine aromatic acid derivatives, two triterpenes and three steroids were isolated from the 90% ethanolic extract and their structures were identified as 3,4-di-hydroxybenzoic acid (1), 4-hydroxybenzoic acid (2), 3-hydroxy-4-methoxy-benzoic acid (3), 4-hydroxy-3-methoxybenzoic acid (4) , gallic acid (5) , methyl gallate (6) , ethyl gallate (7) , lupeol (8) , lupenone (9) , stigmast4-en-3-one (10) beta-sitosterol (11) and daucosterol (12).

CONCLUSIONThis is the first report of chemical constituents from B. aurea. Compounds were isolated from this genus for the first time, except 5,8,11 and 12.

Bauhinia ; chemistry ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Parabens ; chemistry ; isolation & purification ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry ; Triterpenes ; chemistry ; isolation & purification ; Vanillic Acid ; chemistry ; isolation & purification

OBJECTIVETo study the chemical constituents of Bauhinia championii.

METHODCompounds were isolated from the ethanolic extract of B. championii by silica gel column Chromatography, and their structures were elucidated by spectral analyses.

RESULTFive compounds were isolated and elucidated as 2,4,6-trimethoxyphenol 1-O-beta-D-(6'-O-galloyl)-glucopyranoside (1), (+/-)-lyoniresinol (2), daucosterol (3), beta-sitosterol (4) and gallic acid (5).

CONCLUSIONCompounds 1-4 were isolated from B. championii for the first time.

Anisoles ; chemistry ; isolation & purification ; Bauhinia ; chemistry ; Gallic Acid ; analogs & derivatives ; chemistry ; isolation & purification ; Glucosides ; chemistry ; isolation & purification ; Molecular Structure ; Naphthalenes ; chemistry ; isolation & purification ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry ; Sitosterols ; chemistry ; isolation & purification

OBJECTIVETo study the chemical constituents of Bauhinia aurea.

METHODThe compounds were isolated by column chromatography over silica gel, reversed-phase RP-18, and Sephadex LH -20. MS and NMR spectroscopic methods were used to determine structures of purified compounds.

RESULTEight compounds were isolated from the ethyl acetate soluble fraction of the ethanolic extract and their structures were elucidated as isoengeletin (1), astilbin (2), neoastilbin (3), isoastilbin (4), neoisoastilbin (5), (+)-catechin (6), (-)-epicatechin (7) and (-)-epicatechin 3-O-gallate (8).

CONCLUSIONFive compounds were isolated from this genus for the first time except for 2, 6 and 8.

Bauhinia ; chemistry ; Catechin ; analogs & derivatives ; chemistry ; isolation & purification ; Chromatography, Gel ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Flavonoids ; chemistry ; isolation & purification ; Flavonols ; chemistry ; isolation & purification ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry

To study the chemical constituents of Bauhinia glauca subsp. pernervosa, eleven phenolic acids were isolated from a 95% ethanol extract by using a combination of various chromatographic techniques including column chromatography over silica gel, ODS, MCI, Sephadex LH-20, and semi-preparative HPLC. By spectroscopic techniques including 1H NMR, 13C NMR, 2D NMR, and HR-ESI-MS, these compounds were identified as isopropyl O-beta-(6'-O-galloyl)-glucopyranoside (1), ethyl O-beta-(6'-O-galloyl)-glucopyranoside (2), 3, 4, 5-trimethoxyphenyl-(6'-O-galloyl)-O-beta-D-glucopyranoside (3), 3, 4, 5-trimethoxyphenyl-beta-D-glucopyranoside (4), gallic acid (5), methyl gallate (6), ethyl gallate (7), protocatechuic acid (8), 3, 5-dimethoxy-4-hydroxybenzoic acid (9), erigeside C (10) and glucosyringic acid (11). Among them, compound 1 is a new polyhydroxyl compound; compounds 2, 10, and 11 were isolated from the genus Bauhinia for the first time, and the other compounds were isolated from the plant for the first time. Compounds 6 and 8 showed significant protein tyrosine phosphatase1B (PTP1B) inhibitory activity in vitro with the IC50 values of 72.3 and 54.1 micromol x L(-1), respectively.
Bauhinia ; chemistry ; Benzoates ; chemistry ; isolation & purification ; pharmacology ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; pharmacology ; Gallic Acid ; analogs & derivatives ; chemistry ; isolation & purification ; pharmacology ; Glucosides ; chemistry ; isolation & purification ; pharmacology ; Hydroxybenzoates ; chemistry ; isolation & purification ; pharmacology ; Phenols ; chemistry ; isolation & purification ; pharmacology ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry ; Protein Tyrosine Phosphatase, Non-Receptor Type 1 ; metabolism