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ABSTRACT: Four guaia-12,6-olide type sesquiterpene lactones, aguerin B (1), 8α-acetoxyzaluzanin C (2), cynaropicrin (3), and deacylcynaropicrin (4), were isolated from the flowers ofHemisteptia lyrata Bunge. It is the first report on the isolation of compounds1-4 from Hemisteptia species. All the isolates (1-4) were examined for their cytotoxic activity against SK-OV-3, LOX-IMVI, A549, MCF-7, PC-3, and HCT-15 human cancer cell lines.
Archives of Pharmacal Research 04/2012; 26(11):925-928. · 1.59 Impact Factor
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ABSTRACT: A greenhouse experiment was conducted to investigate the effect of calcium fertilizer on yields and effective components of Chrysanthemum. coronarium L. Dried soil fertilized with N-P<sub>2</sub>O<sub>5</sub>-K<sub>2</sub>O was packed into a Wagner pot. Calcium was evaluated by using slaked lime. Predicted maximum of leaf yield was achieved at 2.2 t ha <sup>1</sup> lime and of flower yield at 2.2 t ha <sup>1</sup>. The dry weights of leaf and flower increased significantly with increasing lime up to 2.0 t ha <sup>1</sup> lime. Increasing lime application rate correlated positively with flower sesquiterpene lactone contents and yields, with predicted maximum yields achieved at 2.2 t ha <sup>1</sup>. Predicted maximum yield of leaf essential oil was obtained, but correlation between essential oil content and calcium content in the leaves was not found. In conclusion, calcium could increase yields and medicinal quality of C. coronarium L. and an integrated calcium management with application rate of 2.0-2.5 ton lime ha <sup>1</sup> is suggested.
Journal of Agronomy. 01/2005;
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ABSTRACT: An experiment was conducted to study the relationship between calcium level in the hydrophonic solution on Chrysanthemum coronarium L. yield and essential oil contents. Regression analysis showed that the maximum yield was achieved in 30.9 mM of calcium in nutrient solution for leaves (r = 0.970***) and 38.0 mM for flowers (r = 0.950***). A highly positive correlation (r = 0.961***) was found between sesquiterpene lactone and calcium in the flower part. Maximum yield of essential oil in leaf part was achieved in 39.7 mM Ca<sup>2+</sup> treatment (r = 0.933***) and the correlation between essential oil and calcium contents of leaves was high (r = 0.967***). Therefore, the increase of calcium concentration in nutrient solution had positive effects on the contents and yields of effective component, terpene, from C. coronarium L. The content of sesquiterpene lactone increased with increase of calcium concentration in nutrient solution.
International Journal of Botany. 01/2005;
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ABSTRACT: Four guaia-12,6-olide type sesquiterpene lactones, aguerin B (1), 8alpha-acetoxyzaluzanin C (2), cynaropicrin (3), and deacylcynaropicrin (4), were isolated from the flowers of Hemisteptia lyrata Bunge. It is the first report on the isolation of compounds 1-4 from Hemisteptia species. All the isolates (1-4) were examined for their cytotoxic activity against SK-OV-3, LOX-IMVI, A549, MCF-7, PC-3, and HCT-15 human cancer cell lines.
Archives of Pharmacal Research 12/2003; 26(11):925-8. · 1.59 Impact Factor
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ABSTRACT: A new sesquiterpene lactone (1) was isolated with known dihydrochrysanolide derivatives (2 and 3) from the flowers of Chrysanthemum coronarium L., and their structures were identified by spectroscopic data. The stereochemistry of the epimers (1 and 2) was determined from NOESY data and an X-ray crystallographic analysis. The isolated compounds (1-3) were examined for their cytotoxic activity against such human cell lines as A549, PC-3 and HCT-15.
Bioscience Biotechnology and Biochemistry 05/2002; 66(4):862-5. · 1.28 Impact Factor
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Heterocycles 01/2002; 57(1). · 1.00 Impact Factor
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ABSTRACT: Jasmonic acid (JA) is a plant hormone produced via the octadecanoid pathway from its precursor, linolenic acid. Jasmonates are involved in plant wound responses and defense against insects and fungal elicitors. They can also act as signal molecules in the Bradyrhizobium-soybean symbiosis. Pre-incubation of Bradyrhizobium japonicum inocula with gensitein (Ge), an effective inducer of nodulation genes in this species enhances soybean nodulation, nitrogen fixation and yield under low spring soil temperature field conditions. Since jasmonates are also able to induce nodulation genes and cause the production of lipo-chitooligosaccharides (LCOs) by B. japonicum, we conducted two field experiments, in southwestern Quebec, Canada, to determine whether pre-incubation of B. japonicum with methyl jasmonate (MeJA) alone or in combination with genistein (Ge), prior to inoculation, increased soybean plant dry matter production and grain yield. Experiments at each site used a two factor randomized complete block design (RCBD) with four replicates. Two B. japonicum strains (USDA3 and 532C) and four inducer molecule treatments [control, Ge (20 μM), MeJA (50 μM), and Ge + MeJA (20 μM + 50 μM)] were used in the study. The bacterial cultures were induced for 24 h with the inducer molecules and then applied into the furrows at the time of planting. Both Ge and MeJA, alone or in combination, increased plant growth, dry matter accumulation, and grain yield. This study showed that MeJA, alone or in combination with Ge, can be used to promote soybean plant growth and grain yield under short season field conditions.
Field Crops Research.
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ABSTRACT: Classical, soluble fertilisers create environmental and economic problems. As an alternative, we studied the direct applications of phosphate rock and potassium rock in conjunction with phosphate-solubilising bacteria and potassium-solubilising bacteria for cultivation of hot pepper Capsicum annuum L. Our findings show that integration of P and K rocks with inoculation of P- and K-solubilising bacteria increased P availability from 12 to 21% and K availability from 13 to 15% in the soil as compared with control, and subsequently improved nutrient (N, P and K) uptake to the plant. This integration also increased plant photosynthesis by 16% and leaf area by 35% as compared with control plants. Similarly, biomass harvest and fruit yield of the treated plants were 23% and 30%, respectively, higher as compared with control. Overall, we found that the treatment with P and K rocks and PK-solubilising bacterial strains and the treatment with classical, soluble fertiliser have a similar effectiveness. Therefore, direct application of P and K rocks and solubilising bacteria is a promising, sustainable alternative to the use of classical fertilisers.
http://dx.doi.org/10.1051/agro:2006020.
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ABSTRACT: Chrysanthemum boreale M. is an important medicinal plant that has been historically used in natural medicine and in the food industry throughout East Asia. Most flowerheads used for food are taken from the wild. However, natural sources are limited and there is not enough to meet current demand. To fulfill current and future increasing demand, cultivation systems that produce a greater amount of flowerheads with good quality and yield are required. A field experiment was conducted during the growing seasons of 2000 and 2001 to determine the effects of fertilization treatments [without fertilizer (WF), NPK fertilizer (F), NPK plus lime (FL) and NPK plus swine manure (FS)] on flowerhead yield and the content of essential oils. Fertilizer application increased both flowerheads and essential oil yields in both growing seasons. In addition, the contents of terpene, monoterpenoids and sesquiterpenoids were improved only in FL as compared with WF or F treatments. Yield ha–1 of cumambrin A, a sesquiterpene compound exhibiting blood-pressure regulating activity, was increased by all fertilization treatments, but its concentration in the flowerheads was only increased by FL treatment. Cumambrin A and calcium contents were correlated in flower parts of C. boreale M. This suggests adding calcium could increase the yields and quality of C. boreale M. In general, the correct fertility regime could increase both flowerhead production and concentration of health-promoting substances.
http://dx.doi.org/10.1051/agro:2005022.
