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1.
Insect antifeedant and growth regulating activities of quassinoids from Samadera indica. 总被引：2，自引：0，他引：2
T R Govindachari G N Krishna Kumari G Gopalakrishnan G Suresh S D Wesley T Sreelatha 《Fitoterapia》2001,72(5):568-571
Four quassinoids, indaquassin C (1), samaderins C (2), B (3) and A (4), isolated from the seeds and bark of Samadera indica, were tested for insect antifeedant and growth regulatory activities against the tobacco cutworm, Spodoptera litura. Indaquassin C was the most effective antifeedant. Samaderin C increased pupal duration and induced pupal mortality. 相似文献
2.
观测了金叶红瑞木Swida alba ‘Aurea’在石家庄的物候表现,叶色、枝条的颜色变化;以培育乔木型为目标,以3年生梾木S. macrophylla为砧木,对金叶红瑞木进行了春季枝接和夏季芽接嫁接试验。结果表明:金叶红瑞木开花时,枝条大多数花芽均可生出1~2个伞房状聚伞花序,树冠外围花序先开花,一般是枝条的顶端和向外伸展的侧枝开始开花。生长期叶片金黄色,休眠期枝条鲜红色。在春季3月25日切接成活率为8.22%,4月15日插皮接成活率为7.98%;夏季7月20日一级侧芽作芽穗嫁接成活率高达86.2%,而枝下芽作芽穗嫁接成活率达74.7%;采集带一级侧芽的接穗嫁接,嫁接芽萌发早,长势好;以嫁接为基础,首次提出灌木乔木化理念,成功培植乔木型金叶红瑞木,开发产品新类型。探明了金叶红瑞木在石家庄地区叶片和枝条颜色变化规律以及时间节点,为园林应用提供依据。 相似文献
3.
Constituents from the roots of Semiaquilegia adoxoides 总被引：1，自引：0，他引：1
The isolation of griffonilide (1), lithospermoside (2) and magnoflorine (3) from the roots of Semiaquilegia adoxoides is reported. 相似文献
4.
Generally, berberine, coptisine, palmatine, and jatrorrhizine were considered as the main bio-active compounds in Rhizoma Coptis (RC). Little attention was paid to investigate the pharmacological activity of minor constituents in RC. The present study was designed to separate the minor compounds, and the cytotoxicity and antihyperglycemic effect of these compounds in HepG2 cells were also studied. Palmatine (1), berberine (2), coptisine (3), epiberberine (4), columbamine (5), and jatrorrhizine (6) from RC ethanol extract were isolated by high speed counter current chromatography (HSCCC) in one run. The remaining fraction (about 50% of extract in HSCCC) was further isolated by traditional column chromatography methods to yield magnoflorine (7), ferulic acid (8), and choline (9). Another four alkaloids, namely groenlandicine (10), berberrubine (11), oxyberberine (12), 8-oxo-coptisine (13), also were obtained from CHCl3 extracts. Especially, choline was first isolated from RC. Cell assay indicated that the minor fractions excluding compounds 1-6 showed obvious glucose lowering activity. In addition, the minor monomers also exhibited moderate glucose lowering activity. The combination of berberine and ferulic acid showed synergistic effect on antihyperglycemic. The combination of alkaloids 1-6 was same so. All compounds had different cytotoxicity in HepG2 cells within the test concentration. Of them, berberrubine showed the strongest cytotoxicity. The results suggested that combined action of variety constituents contributed to the antihyperglycemic effets and low cytotoxicity of RC extract in HepG2 cells. 相似文献
5.
From the isopropyl acetate fraction obtained by partition of the leaves ethanolic extract of Alchornea glandulosa, six phenolic compounds were isolated and identified. General lethality of the extract, fractions and compounds were assayed with Brine Shrimp Test (BST) and with Antifeedant Activity Bioassay (AAB) against neonate larvae of Spodoptera frugiperda. Aqueous fraction and ethyl gallate, one of the major constituents of the polar fraction, have shown the highest toxicity in BST. Ethanolic extract, isopropyl acetate fraction and gallic acid reduced significantly larval growth of S. frugiperda neonates. 相似文献
6.
A novel compound, 8(17),12E,14-labdatrien-19-al (trans-communal), was isolated from ethyl acetate extract of young cones of hinoki (Chamaecyparis obtusa Endl.). The chemical structure of the compound was determined mainly with various nuclear magnetic resonance spectral techniques. Its stereochemistry was determined by derivation to a known compound,trans-communol. In addition to this compound, four known compounds — ferruginol, chamaecydin, 12-hydroxy-6,7-seco-abieta-8,l 1,13-triene-6,7-dial, and frans-communic acid — were isolated. All isolated compounds were subjected to an antifeedant bioassay against the pest insectSpodoptera litura. Results of the bioassay showed that chamaecydin and 12-hydroxy-6,7-seco-abieta-8,11,13-triene-6,7-dial had antifeedant activity.Part of this report was presented at 45th Annual Meeting of the Japan Wood Research Society, Tokyo, April 1995 相似文献
7.
Thirteen plants growing in Tunisia were tested against Spodoptera littoralis larvae. From the acetone extract of Ajuga pseudoiva leaves, showing interesting antifeedant activity, three new (1-3) and two known (4-5) active clerodane diterpenoids were isolated following a bioassay-guided chromatography. 相似文献
8.
Two new diarylheptanoids (1, 2), together with two known analogs (3, 4), were isolated from the rhizomes of Alpinia officinarum. The new compounds were elucidated to be (5S)-5-hydroxy-7-(3, 4-dihydroxyphenyl)-1-phenyl-3-heptanone (1) and (5R)-5-hydroxy-7-(3-methoxy-4, 5-dihydroxyphenyl)-1-phenyl-3-heptanone (2) based on their spectral analysis. Compound 4 showed moderate cytotoxicity against human tumor cell lines, HepG2, MCF-7 and SF-268, while no significant effect were found for compounds 1-3. 相似文献
9.
Two new sesquiterpenes deltoiden A (1) and deltoiden B (2), and two new lignans deltoignan A (9) and deltoignan B (10), together with 14 known compounds, including six sesquiterpenes 3-8 and three lignans 11-13, were isolated from the whole plant of Saussurea deltoidea. Compounds 3-8 and 11-17 were isolated for the first time from this plant. Their structures were established by spectroscopic analysis, including 2D-NMR spectroscopic techniques. Cytotoxicities of compounds 1-13 were tested against three cancer cell lines A549, Hela and SMMC-7721. Results showed that 5, 6 and 7 exhibited cytotoxicity against SMMC-7721 with the IC(50) values of 6.49, 9.53, 1.23 μg/ml, 5 and 7 against A549 with the IC(50) values of 4.99 and 5.35 μg/ml, 5, 6, 7, 13 against Hela with the IC(50) values of 1.40, 4.75, 0.93 and 5.42 μg/ml, respectively. The structure-activity relationships of sesquiterpenes 1-8 were discussed on the base of cytotoxic results. 相似文献
10.
11.
Two new heptaketides, (+)-(2S,3S,4aS)-altenuene (1a) and (-)-(2S,3S,4aR)-isoaltenuene (2a), together with six known compounds, (-)-(2R,3R,4aR)-altenuene (1b), (+)-(2R,3R,4aS)-isoaltenuene (2b), 5'-methoxy-6-methyl-biphenyl-3,4,3'-triol (3), alternariol (4), alternariol-9-methyl ether (5), and 4-hydroxyalternariol-9-methyl ether (6) were isolated from the EtOAc extract of an endolichenic fungal strain Nigrospora sphaerica (No.83-1-1-2). Compounds 1a and 1b were separated from enantiomers 1 by chiral HPLC, and so were 2a and 2b from enantiomers 2. Interestingly, 1-6 were also obtained from other two endolichenic fungal strains Alternaria alternata (No.58-8-4-1) and Phialophora sp. (No.96-1-8-1). The structures of 1-6 were elucidated by means of MS, HR-MS, NMR, and X-ray diffraction. Furthermore, the absolute configurations of 1a-2b were determined by CD experiments and CD calculation. Of these compounds, 4 and 5 showed antiviral activity against herpes simplex virus (HSV) in vitro, with IC(50) values of 13.5 and 21.3 μM, and with selective index (SI) values of 26.5 and 17.1, respectively. 相似文献
12.
为比较羟基马桑毒素(tutin)及其衍生物(1,2,3)杀虫活性的差异,采用非选择性叶碟法分别测定其对试虫的拒食活性,采用比色法测定这4种化合物在亚致死剂量下(2.0mg·mL-1)粘虫的酯酶、2类保护酶和可溶性总糖在48h内的变化趋势.结果表明:在48h内的拒食活性衍生物2＞衍生物3＞衍生物1＞Tutin;Tutin、衍生物1和3可致粘虫的酯酶活性和可溶性总糖含量略升高,保护酶活性无明显变化;衍生物2可使试虫的酯酶活性,可溶性总糖含量和SOD活性显著升高.Tutin的2位羟基进行酰化加成改造后能显著提高其拒食活性,衍生物2是最优结构化合物. 相似文献
13.
从小叶臭黄皮(Clausena excavata Burm F.)的茎和叶中分离得到10个单萜基香豆素,分别鉴定为7-((E)-3'-甲基-4'-(8'-羰基-7',9'-烯-呋喃)-2'-烯)-香豆素(1)、7-((E)-3'-甲基-4'-(7'-甲基-8'-羰基-6'-烯-呋喃)-2'-烯)-香豆素(2)、7-((E)-3'-甲基-4'-(7'-甲基-6'-亚甲基-8'-羰基-呋喃)-2'-烯)-香豆素(3)、7-((E)-3'-甲基-4'-(9'-羟基-8'-羰基-6'-烯-呋喃)-2'-烯)-香豆素(4)、7-(3'-甲基-4'-(7'-甲基-8'-羰基-6'-烯-呋喃)-2',3'-环氧丁烷)-香豆素(5)、7-(3'-甲基-4'-(9'-羟基-8'-羰基-6'-烯-呋喃)-2',3'-环氧丁烷)-香豆素(6)、7-(3'-甲基-4'-(7'-甲基-7'-羟基-8'-羰基-6'-烯-呋喃)-2',3'-环氧丁烷)-香豆素(7)、7-(3'-甲基-4'-(7'-甲基-8'-羰基-呋喃)-2',3'-环氧丁烷)-香豆素(8)、5'-羟基葡萄内酯(9)和7-((E)-7'-羟基-3',7'-二甲基-2',5'-二烯)-香豆素(10),2个四降三萜,鉴定为11β-羟基-1α-乙酰基黄柏酮(11)、11β-羟基黄柏酮(12)和1个木脂素,鉴定为(-)-丁香脂素(13)。其中化合物11和13为首次从该植物中分离得到。测定了化合物1、2、3、11和12对癌细胞株A549、Hela和BGC-823的细胞毒活性,及其对白色念珠菌(Candida albicans)、金黄色葡萄球菌(Staphylococcus aureus)的抑菌活性。结果显示,化合物1对Hela和A549均有细胞毒活性,其半数抑制质量浓度(IC_(50))值分别为11.26和13.55 mg/L,化合物3对BGC-823有细胞毒活性,其IC_(50)值为16.65 mg/L,5个化合物对白色念珠菌和金黄色葡萄球菌均没有抗菌活性。 相似文献
14.
《Fitoterapia》1999,70(3):269-274
The antifeedant activity of six diterpenes against the fourth instar nymphs and adults of Henosepilachna vigntioctopunctata was evaluated using a dual choice leaf disc bioassay. Caryoptin was the most effective antifeedant among the compounds tested. Andrographolide, wightionolide and 3-epicaryoptin did not deter feeding by adults. The possible relationship of structure to antifeedant activity is discussed. 相似文献
15.
Forty-five-day-old seedlings of sour orange (Citrus aurantium L.) and Citrus macrophylla Wester, the most commonly used rootstocks in lemon orchards, were grown in nutrient solutions containing 1 (control), 10, 20, 30 or 60 mM NaCl for 14 days. The effects of salinity on growth, uptake, transport and accumulation of Cl- and Na+ ions in leaves, stem and four root segments were studied. The 60 mM NaCl treatment reduced leaf dry mass more in C. macrophylla (40%) than in sour orange (20%), whereas it reduced root dry mass more in sour orange (36%) than in C. macrophylla (20%). In C. macrophylla, Cl- and Na+ uptake rates were high at the beginning of the saline treatments, but low at the end of the 14-day experiment. In contrast, sour orange showed high uptake rates at the beginning and end of the experiment. In response to increasing salinity, root and shoot concentrations of Cl- and Na+ increased in sour orange, but not in C. macrophylla. Different loading characteristics of Cl- and Na+ were observed between young and old segments of the root system. In general, old root segments reached quasi-steady-states later than young root segments. These results suggest that sour orange and C. macrophylla have different regulatory mechanisms for uptake and transport of Cl- and Na+. 相似文献
16.
Insecticidal activity of Vitex mollis 总被引：3，自引：0，他引：3
Organic extracts from the leaves of Vitex mollis were assessed for their toxic effect on fall armyworm neonate larvae (Spodoptera frugiperda), an important insect pest of corn. The extracts showed insecticidal and insect growth regulatory activity, being CHCl(3)-MeOH (1:1) extract the most active, also found to be toxic in the Artemia salina test. 相似文献
17.
Two new compounds, a neolignan (1), and a benzofuran derivative (2), along with 6 known compounds (3-8), were isolated from the aerial parts of Leontopodium leontopodioides. The structures of the new compounds were elucidated as (7R,8S)-3,5'-dimethoxy-4',7-epoxy-8,3'-neolignane-5,9,9'-triol (1) and (2R)-12-hydoxy-4-methoxy-tremeton (2) on the basis of their spectroscopic data, respectively. All of the isolates were evaluated for their effects on the inhibition of nitric oxide (NO) production in lipopolysaccharide-activated RAW264.7 macrophages and compounds 1 and 8 exhibited inhibitory activity with IC(50) values of 35.80 and 24.41 μM, respectively. 相似文献
18.
《Fitoterapia》2014
Three new glucosides, namely, (–)-7R8S-7′,8′-dihydroxy-dihydrodehydroconiferyl alcohol-9-O-β-d-glucopyranoside (1), (+)-7S8R-7′,8′-dihydroxy-dihydrodehydroconiferyl alcohol-9-O-β-d-glucopyranoside (2) and 4-hydroxy-2-methoxyphenyl 1-O-[6-(hydrogen 3-hydroxy-3-methylpentanedioate)]-β-d-glucopyranoside (3), along with 6 known compounds were isolated from the fruit of Euterpe oleracea Mart. Their structures were elucidated based on spectroscopic analyses including NMR, HR-ESI-MS and CD. All the isolated compounds demonstrated significant antioxidant activity and 2 displayed moderate cytotoxicity against HL-60 cells. 相似文献
19.
Antifeedant activities of the isolated chemical compounds from Ajuga nipponensis, were studied against adult of striped leaf beetles. The methanol, petroleum ether, ethyl acetate and n-butanol extracts at 1.0 mg/ml, were used in this study. All four extracts exhibited more than 65 antifeedant index at 24 h
and ethyl acetate extract showed significant activity against striped leaf beetles with 83.12 antifeedant index. Six compounds
and one fraction were isolated by chromatography and their structures were identified by NMR, MS and FTIR spectra. At 2.0 mg/ml
for 24 h the three compounds 20-hydroxyecdysone, acacetin and apigenin showed considerable activities with antifeedant indexes
59.29, 51.22 and 61.55, respectively. In contrast to this the antifeedant indexes of acacetin and apigenin, were sharply reduced
as the time extended and that of 20-hydroxyecdysone remained unchanged. In addition, the synergistic effects of two mixtures
of secondary metabolites, were studied and no sharp difference was observed. 相似文献
20.
Maneerat W Phakhodee W Ritthiwigrom T Cheenpracha S Promgool T Yossathera K Deachathai S Laphookhieo S 《Fitoterapia》2012,83(6):1110-1114
Three new carbazole alkaloids, harmandianamines A-C (1-3), together with fifteen known compounds (4-18) were isolated from the twigs of Clausena harmandiana. The structures were elucidated by spectroscopic methods, including UV, IR, NMR, and MS. The antibacterial activity against Escherichia coli TISTR 780, Salmonella typhimurium TISTR 292, Staphylococcus aureus TISTR 1466 and methicillin-resistant S. aureus (MRSA) SK1 of some isolated compounds was also evaluated. Compound 6 exhibited significant antibacterial activity against MRSA SK1 with an MIC value of 0.25 μg/mL which higher than that of standard drug, vancomycin (MIC value=1 μg/mL) whereas compounds 14 and 5 showed strong activity with MIC values of 4 and 8 μg/mL, respectively. Only compound 14 showed strong antibacterial activity against S. aureus TISTR 1466 with an MIC value of 4 μg/mL. 相似文献