E-octadec-7-en-5-ynoic acid from the roots of Capparis zeylanica   总被引：1，自引：0，他引：1  

Haque ME  Haque M  Rahman MM  Rahman MM  Khondkar P  Wahed MI  Mossadik MA  Gray AI  Sarker SD 《Fitoterapia》2004,75(2):130-133

A new fatty acid, E-octadec-7-en-5-ynoic acid (1), has been isolated from chloroform extract of the roots of Capparis zeylanica. The structure of this compound was established primarily by 1D and 2D-NMR spectroscopy.  相似文献   

Genetic Variation in Root Traits and Nutrient Acquisition of Lentil Genotypes     

Tara Singh Gahoonia  Omar Ali  Ashutosh Sarker  Niels Erik Nielsen  M. Matiur Rahman 《Journal of plant nutrition》2013,36(4):643-655

ABSTRACT

Lentil (Lens culinaris L.), a pulse crop, is grown in nutrient-poor soils in many developing countries, often with little or no fertilization. Knowledge on root traits of lentil and the assessment of their role in nutrient capture would help to sustain its production in these nutrient-poor soils. Root traits (root length, root hairs, root-induced acidification, and phosphatase enzymes) of 10 lentil genotypes (Barimasur-3, Barimasur-4, PLX-79542, GP-8407-5, GP-8403, BLX-79542, L-5 × 8704(2), L-107 × 87012, L-5 × 87272 and 8406-122) were investigated and then related to the plant uptake of phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulphur (S), iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B), molybdenum (Mo), and cobalt (Co) in laboratory and pot experiments. There were significant (p < 0.05) differences in root length (RL) and root-hair density (number mm^?1 root) among the genotypes. The genotypes did not differ to induce rhizosphere acidification and acid phosphatase activity (aptase). Uptake of most nutrients differed significantly (p < 0.05) among the genotypes, but root length (RL) was, in general, weakly correlated to the uptake of the most nutrients in the shoot dry matter (DM). The genotypes with prolific root-hair formation (Barimasur-4 and Barimasur-3) were particularly superior in uptake of those nutrients (K, P, Fe, Mn, Cu, Zn, Mo) whose availability in soils is usually low and whose transport to the roots is diffusion limited. The results of this investigation, though based on a small sample of lentil accessions/cultivars, suggest that genetic variation in lentil root traits and nutrient uptake can be pronounced. Screening of a large number of local and exotic cultivars or lines of lentil should be conducted by including more root traits (N₂ fixation, organic acids, mycorrhizae) to find nutrient-efficient germplasm to promote lentil production.  相似文献   

Phytochemical and antimicrobial activities of the Daniellia oliveri leaves     

Ahmadu A  Haruna AK  Garba M  Ehinmidu JO  Sarker SD 《Fitoterapia》2004,75(7-8):729-732

The n-butanol soluble part and four chromatographic fractions of the aqueous ethanolic extract of the leaves of Daniellia oliveri were investigated for antimicrobial properties. All fractions showed activity against Staphylococcus aureus. A chromatographic fraction showed significant activity against the fungus Tricophyton rubrum.  相似文献   

Antibacterial and free radical scavenging activity of the seeds of Agrimonia eupatoria     

Copland A  Nahar L  Tomlinson CT  Hamilton V  Middleton M  Kumarasamy Y  Sarker SD 《Fitoterapia》2003,74(1-2):133-135

n-Hexane, dichloromethane and methanol extracts of the seeds of Agrimonia eupatoria have been assessed for antibacterial and free radical scavenging activity.  相似文献   

Exploitation of wild annual Cicer species for widening the gene pool of chickpea cultivars          下载免费PDF全文

Mohar Singh  Krishna Kumar  Ishwari S. Bisht  Manoranjan Dutta  Mukesh K. Rana  Jai C. Rana  Kailash C. Bansal  Ashutosh Sarker 《Plant Breeding》2015,134(2):186-192

Introgression of unadapted genes from the wild Cicer species could contribute to the widening of genetic base of important traits such as yield, yield attributes and resistance to major biotic and abiotic stresses. An attempt was made successfully to intercross two wild annual Cicer species with three cultivated chickpea cultivars. Four interspecific cross‐combinations were made, and their true hybridity was ascertained through morphological and molecular markers. These cross‐combinations were also studied for some important quantitative traits under real field conditions. The range, mean and coefficient of variation of agro‐morphological traits were assessed in the parental lines, their F₁ and F₂ generations to determine the extent of variability generated in cultivated chickpea varieties. A high level of heterosis was recorded for number of pods/plant and seed yield/plant in F₁ generation. Three cross‐combinations of ‘Pusa 1103’ × ILWC 46, ‘Pusa 256’ × ILWC 46 and ‘Pusa 256’ × ILWC 239 exhibited substantially higher variability for important yield‐related traits. The present research findings indicate that these wild annual Cicer species can be easily exploited to broaden the genetic base of cultivated gene pool for improving seed yield as well as adaptation.  相似文献   

How Does the Variability in Aus Rice Yield Respond to Climate Variables in Bangladesh?     

Md. A. R. Sarker  K. Alam  J. Gow 《Journal of Agronomy and Crop Science》2013,199(3):189-194

In this study, the impacts of climate variables on the mean and variability in Aus variety rice yield in Bangladesh are assessed. Using the theoretical framework of the Just–Pope production function, cross‐sectional time series data on Aus rice yield and maximum temperature, minimum temperature and rainfall at a district level over a period of 38 years are analysed for evidence of rice yield variability as a result of climate change. The findings reveal that minimum temperature and rainfall decrease Aus yield variability. However, maximum temperature appears to increase variability, which may reduce Aus rice production. Therefore, government should create an enabling environment to develop temperature‐tolerant rice varieties for Aus rice crop to ensure ongoing food security.  相似文献   

Molecular modeling directed by an interfacial test apparatus for the evaluation of protein and polymer ingredient function in situ     

Collins GW  Patel A  Dilley A  Sarker DK 《Journal of agricultural and food chemistry》2008,56(10):3846-3855

A simplified apparatus is described that measures the damping of a suspended measuring device. The movement of the device (bob) is damped by the properties of the air-water surface adsorbed material. Its value lies in describing the surface chemomechanical properties of ingredients and excipients used in food, nutraceutical, cosmetic (cosmeceutical), and natural drug-food product formulations that traverse the food sciences. Two surfactants, two food and drug-grade polymers, and five naturally occurring food and serum proteins were tested and used to estimate and model interfacial viscoelasticity. Equilibration times of >15 min were found to give sufficiently stable interfaces for routine assessment. The viscoelasticity of the air-water interface was estimated with reference to model solutions. These model solutions and associated self-assembled interfacial nanostructured adsorbed layers were fabricated using a preliminary screening process with the aid of a specialized foaming apparatus ( C(300) values), surface tension measurements (23-73 mN/m), and referential surface shear and dilation experiments. The viscoelasticity measured as a percentage of surface damping ( D) of a pendulum was found to range from 1.0 to 22.4% across the samples tested, and this represented interfacial viscosities in the range of 0-4630 microNs/m. The technique can distinguish between interfacial compositions and positions itself as an easily accessible valuable addition to tensiometric and analytical biochemistry-based techniques.  相似文献   

Micronutrient responsiveness of cauliflower,okra, and rice in a pattern in piedmont soil     

Md. Mosharaf Hossain Sarker  Md. Jahiruddin  Abu Zofar Md. Moslehuddin  Md. Rafiqul Islam 《Journal of plant nutrition》2018,41(11):1358-1367

Soil micronutrients have different degrees of residual effect to crops; again crops differ in their sensitivity to micronutrient requirement. Evaluation of residual effects of micronutrient application to cauliflower, okra, and transplant aman rice in a pattern was studied in piedmont soil of Bangladesh. In this study, seven treatment combinations including a control treatment were tested, and the treatments were designed taking the micronutrients following the additive element trial technique. The rates of micronutrients were 3 kg zinc (Zn), 2 kg boron (B), 2 kg Cu, 3 kg manganese (Mn), 5 kg iron (Fe), and 1 kg molybdenum (Mo) per hectare. Both Zn and B were found responsive for the first crop. As second crop, okra responded to both residual Zn and B, whereas in the third crop, residual effects of only Zn were reported. Zn fertilizer need not to apply in each crop of a cropping pattern.  相似文献   

Variability in total antioxidant capacity,antioxidant leaf pigments and foliage yield of vegetable amaranth     

Umakanta Sarker  Md Tofazzal Islam  Md Golam Rabbani  Shinya Oba 《农业科学学报》2018,17(5):1145-1153

Twenty vegetable amaranth genotypes were evaluated for total antioxidant capacity, antioxidant leaf pigments, vitamins, and selection of suitable genotypes for extraction of juice in a randomized complete block design(RCBD) with three replications. Vegetable amaranth was rich in chlorophyll, β-cyanins, β-xanthins, betalains, carotene, ascorbic acid and total antioxidant. The genotypes VA14, VA16, VA18, VA15, and VA20 could be selected as amaranth vegtable varieties with high yields and abundance antioxidant leaf pigments and vitamins to produce juice. The genotypes VA13 and VA19 had above-average foliage yield and high antioxidant profiles while the genotypes VA2, VA3, VA9, VA11, VA12, and VA17 had a high antioxidant profiles and below-average foliage yield. These genotypes could be used as a donor parent for integration of potential high antioxidant profiles genes into other genotypes. The correlation study revealed a strong positive association among all the antioxidant leaf pigments, total antioxidant capacity and foliage yield. Selection based on total antioxidant capacity, antioxidant leaf pigments could economically viable to improve the yield potential of vegetable amaranth genotypes. Total carotene and ascorbic acid exhibited insignificant genotypic correlation with all the traits except total antioxidant capacity. This indicates that selection for antioxidant vitamins might be possible without compromising yield loss.  相似文献   

Genome sequence of an Australian strain of canid alphaherpesvirus 1          下载免费PDF全文

S Sarker  S Das  K Helbig  A Peters  SR Raidal 《Australian veterinary journal》2018,96(1-2):24-27

Objective

Characterisation of a complete genome sequence of an Australian strain of canid alphaherpesvirus 1 (CHV‐1) and its phylogenetic relationship with other varicellovirus species.

Methods

Standard pathology and PCR methods were used to initially detect herpesvirus in hepatic tissue from an infected 4‐week‐old Labrador Retriever puppy. The complete CHV‐1 genome was sequenced using next‐generation sequencing technology followed by de novo and reference assembly, and genome annotation.

Results

The CHV‐1 genome was 125 kbp in length and contained 74 predicted open reading frames encoding functional proteins, all of which have counterparts in other alphaherpesviruses. Phylogenetic analysis using the DNA polymerase gene revealed that the newly sequenced CHV‐1 clustered with canid alphaherpesvirus isolated from the UK and shared a 99% overall nucleotide sequence similarity.

Conclusion

This is the first complete genome of an Australian strain of CHV‐1, which will contribute to our understanding of the genetics and evolution of herpesvirus.  相似文献