Showing papers on "Corchorus olitorius published in 2009"
TL;DR: The additive/synergistic antioxidant activities of the hydrophilic and lipophilic consituents may contribute to the medicinal properties of C. olitorius leaf.
Abstract: Corchorus olitorius (jute) is a native plant of tropical Africa and Asia, and has since spread to Australia, South America and some parts of Europe. Its leafy vegetable is popularly used in soup preparation and folk medicine for the treatment of fever, chronic cystitis, cold and tumours. A comparative study of the antioxidant properties of hydrophilic extract (HE) and lipophilic extract (LE) constituents of the leafy vegetable has been assessed. HE and LE of the leaf were prepared using water and hexane, respectively and their antioxidant properties were determined. HE had a significantly higher (P 0.05) in their Fe(II) chelating ability (HE, 57.7-66.7%; LE, 56.4-61.1%). The higher 1,1-diphenyl-2-picrylhydrazyl radical-scavenging ability, reducing power and trolox equivalent antioxidant capacity of the hydrophilic extract may be due to its significantly higher (P<0.05) total phenol (630.8 mg/100 g), total flavonoid (227.8 mg/100 g) and non-flavonoid polyphenols (403.0 mg/100 g), and its high ascorbic acid content (32.6 mg/100 g). While the higher OH. scavenging ability of LE may be due to its high total carotenoid content (42.5 mg/100 g). Therefore, the additive/synergistic antioxidant activities of the hydrophilic and lipophilic constituents may contribute to the medicinal properties of C. olitorius leaf.
74 citations
TL;DR: In this paper, a bioassay-guided fractionation of the leaf extract of corchorus olitorius, a highly fibrous vegetable commonly known as moroheiya, has been used for the isolation of two new flavonol glycosides named Corchorusides A and B, in addition to a major component, capsugenin 25,30-O-β-diglucopyranoside.
27 citations
Journal Article•
TL;DR: This review, attempts to summarize the achievements made in jute and kenaf research and also strive to highlight the constraints faced by the raw jute sector along with its possible mitigation options.
Abstract: About 5 million people get employment in raw jute (jute and kenaf) farming, trading and industry though the crop occupies only 0.55% of the gross cropped area of the country. The productivity of jute had doubled from 1.10 tonnes/ha during 1947 to about 2.24 tonnes/ha in 2006–07 made possible through development of high-yielding varieties and improved production technologies though the acreage remains stagnated around 0.80 million ha. Significant improvement in fibre quality has been attained during this period. The changing climate coupled with variable soil conditions had often exposed the crop to more biotic and abiotic stresses which are affecting the yield and fibre quality and is also creating considerable regional disparity in yield level of the crop. Stiff competition from low-cost synthetic fibres is compelling us towards product diversification and value-addition for which improvement in quality attributes is of paramount importance. This review, attempts to summarize the achievements made in jute and kenaf research and also strive to highlight the constraints faced by the raw jute sector along with its possible mitigation options.
22 citations
16 citations
TL;DR: The effects of population density on some agronomic traits of Corchorus olitorius were investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006.
Abstract: The effects of population density on some agronomic traits of Corchorus olitorius were investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006, at the Ojo campus of Lagos State University (LASU), Nigeria The randomized block design (RBD) was the experimental design used, with three replicates The direct effect of competition was investigated on the following agronomic attributes; final height/plant, number of branches/plant, stem girth/plant, number of leaves/plant, total fresh weight, total dry weight, moisture content, total leaf length, leaf petiole length, leaf area, blade length and blade width A highly significant effect (p occurrence of intraspecific competition in population of jute plant
16 citations
TL;DR: In this article, the effects of pre-chilling and temperature on the germination of seeds of a crop with a potential for development as a crop was investigated, using tetrazolium technique.
Abstract: L, has a potential for development as a crop. Self propagation of this species is by seed. In an attempt to improve the length of time of its availability, the effects of pre-chilling and temperature on germination of its seeds were investigated. Although it had a seed viability of 90.1% (using the tetrazolium technique), seed subjected to a temperature of 25
11 citations
Journal Article•
TL;DR: The experiment was conducted to establish an efficient and reproducible protocol for the plant regeneration and genetic transformation, which can be used for the improvement of tossa Jute quality using other useful genes.
Abstract: The experiment was conducted to establish an efficient and reproducible protocol for the plant regeneration and genetic transformation, which can be used for the improvement of tossa Jute (Corchorus olitorius L.). It was demonstrated that the percent of seeds germination in agar based medium found to be very low (43.1%) , as compared to clinical cotton supported MS liquid medium, which was found to be very high (97.6%) and the highest percentage of root initiation was recorded for the variety O-9897 (53.6%) which was statistically identical by variety O-72 (49.4%) .The performance of varieties in A. tumefaciens showed significant difference in respect of number of explants produced shoot and percent shoot regeneration. Variety O-9897 gave the best performance as compared to variety O-72. In transformed explants, GUS reporter gene was expressed showing blue color in the explant tissues. Non-transformed explants did not show any color. Variety O-9897 showed the highest response to GUS assay (86.6%) as compared to O-72 (80.0%). This efficent regeneration and transformation system can be further used for the improvement of Jute quality using other useful genes.
7 citations
Journal Article•
TL;DR: In this paper, the effects of population density on some agronomic traits of Corchorus olitorius were investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006, at the Ojo campus of Lagos State University (LASU), Nigeria.
Abstract: The effects of population density on some agronomic traits of Corchorus olitorius were investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006, at the Ojo campus of Lagos State University (LASU), Nigeria. The randomized block design (RBD) was the experimental design used, with three replicates. The direct effect of competition was investigated on the following agronomic attributes; final height/plant, number of branches/plant, stem girth/plant, number of leaves/plant, total fresh weight, total dry weight, moisture content, total leaf length, leaf petiole length, leaf area, blade length and blade width. A highly significant effect (p occurrence of intraspecific competition in population of jute plant.
7 citations
Journal Article•
TL;DR: In this paper, the effects of Corchorus olitorius powder on the quality characteristics of emulsion type sausages during storage at 4℃ for 28 days was evaluated.
Abstract: In this study, the effects of Corchorus olitorius powder on the quality characteristics of emulsion type sausages during storage at 4℃ for 28 days was evaluated. Sausages were produced containing 0.5%, 1.0% and 1.5% C. olitorius powder. The pH values of sausage containing C. olitorius powder were higher than the control during 28 days of storage. The L and a values of sausage containing C. olitorius powder significantly decreased with increasing C. olitorius powder content; however, the b values significantly increased. The volatile basic nitrogen (VBN) and nitrite content of sausage containing C. olitorius powder were lower than that of the control. Especially, the VBN and nitrite content of sausages containing 1.5% C. olitorius powder were significantly lower compared to the control. In addition, sausages with 0.5~ 1.0% C. olitorius powder had higher hardness, cohesiveness, gumminess and brittleness than the control. In regards to the sensory evaluation, sausages containing 0.5% C. olitorius powder had the highest overall acceptability. Therefore, these results suggest that it may be possible to manufacture sausages containing 0.5% C. olitorius powder to help improve the overall quality of sausage.
4 citations
Journal Article•
4 citations
Journal Article•
TL;DR: The results indicate that the early transition from vegetative stage to reproductive stage has contrary aspects regarding the economic production of vegetable and seed: unfavorable to vegetable yield but crucial for seed production.
Abstract: Here we firstly report on the growth and development characteristics of molokhia (Corchorus olitorius L.) in Korea, which is a subtropical vegetable that reportedly contains rich minerals and biologically functional substances. Three molokhia accessions introduced from Japan and the Philippines were cultivated in different cropping seasons. The spring-sown (20 April) seedlings showed a vigorous growth during hot season, and their final heights mounted up to 3.3 m when measured in the end of cultivation (20 October). Both spring- and summer-sown (20 June) molokhia plants produced the marketable tender shoots while the growth of autumn-sown (20 August) ones was suppressed owing to low temperature. Meanwhile, the first flowering arose from springand summer-sown plants on 19 May and 23 October, respectively, which confirms that molokhia is a short day plant species with daylength-sensitivity variation depending on genotypes. Our results indicate that the early transition from vegetative stage to reproductive stage has contrary aspects regarding the economic production of vegetable and seed: unfavorable to vegetable yield but crucial for seed production. The viable seeds were harvested from the summer-sown plants in the amount of 10 g per plant. We believe that the present study might contribute to domestic production of molokhia as a leafy vegetable with seeds in Korea, a temperate zone.
Journal Article•
Patent•
29 Oct 2009
TL;DR: In this article, a food containing Corchorus olitorius extract is provided to reduce total cholesterol and neutral lipid content in a liver, and to remove oxidizing stress, using a solvent, standard product, and experiment equipment.
Abstract: PURPOSE: A food containing Corchorus olitorius extract is provided to reduce total cholesterol and neutral lipid content in a liver, and to remove oxidizing stress. CONSTITUTION: A food containing Corchorus olitorius extract is produced using a solvent, standard product, and experiment equipment. The solvent for use in extracting and fractioning a sample is methanol, n-hexane, chloroform, ethylacetate, or n-butanol. The standard product for use in HPLC is quercetin, chlorogenic acid, quercetin-3-glucoside, or quercetin-3-galactoside. The experiment equipment is a rotary vacuum evaporator, UV/visible spectrophotometer, incubator, HPLC, PCR machine, Mini-Protein electrophoresis system, microplate spectro-photometer, microplate shaker, ultracentrifuge, cryotome, or micro haematocrit centrifuge.
Patent•
29 Oct 2009
TL;DR: In this paper, a food containing Corchorus olitorius L. extract is provided to increase total polyphenol and flavonoid content at the same time exhibiting high DPPH and ABTS removal effect.
Abstract: PURPOSE: A food containing Corchorus olitorius L. extract is provided to increase total polyphenol and flavonoid content at the same time exhibiting high DPPH and ABTS removal effect. CONSTITUTION: A food containing Corchorus olitorius L. extract is produced using a solvent, standard product, and experiment equipment. The solvent for use in extracting and fractioning a sample is methanol, n-hexane, chloroform, ethylacetate, or n-butanol. The standard product for use in HPLC is quercetin, chlorogenic acid, quercetin-3-glucoside, or quercetin-3-galactoside. DMEM, antibiotic, Fetal bovine serum(FBS) are used for cell cultivation. A reagent for use in RNA extraction is Trizol solution Molecular Research Center, or 1-bromo-3-chloro-propane.
Journal Article•
TL;DR: It was observed that the balance in the concentration of auxin-cytokinin (in initial culture) as well as ploidy level in the cells is most important-factors in controlling differentiation.
Abstract: The present paper deals with the induction and regeneration of callus tissue from in vitro system of jute (Corchrous olitorius L. Var JRO-632). Hypocotyl of in vitro germinated seedlings was taken as explants. Hypocotyl explants were cultured in both Murashige and Skoog’s (1962)(MS) and Schenk and Hildebrand’s (1972)(SH) basal media supplemented with different growth regulators in definite concentrations. Callus growth was found better in MS basal medium than SH medium. For morphogenetic study the hypocotyl callus tissues were grown in medium containing different combinations and concentrations of auxins (IAA, NAA, IBA and 2,4-D used separately @ 0.20 mg/L) and cytokinins (BAP and Kinetin used separately 0.15mg/K to 3.2 mg/L, coconut milk 10-35% volume/volume). A simplified method for morphogenesis of calli was standardized. Cytological studies of the regenerated roots from calli as well as from regenerated plants revealed diploid chromosome number while the calli were mixoploid in nature. It was observed that the balance in the concentration of auxin-cytokinin (in initial culture) as well as ploidy level in the cells is most important-factors in controlling differentiation.
TL;DR: In this paper, the effects of population density on some agronomic traits of Corchorus olitorius were investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006, at the Ojo campus of Lagos State University (LASU), Nigeria.
Abstract: The effects of population density on some agronomic traits of Corchorus olitoriuswere investigated by growing the seedlings in a field experiment at densities of 1, 2, 5, 10, 25, 50 and 100 plants per m2 during the raining season of 2006, at the Ojo campus of Lagos State University (LASU), Nigeria. The randomized block design (RBD) was the experimental design used, with three replicates. The direct effect of competition was investigated on the following agronomic attributes; final height/plant, number of branches/plant, stem girth/plant, number of leaves/plant, total fresh weight, total dry weight, moisture content, total leaf length, leaf petiole length, leaf area, blade length and blade width. A highly significant effect (p < 0.01) of competition was observed for final plant height and total moisture content/ plant, while significant effect (p < 0.05) was observed for other attributes investigated, except for all leaf parameters where insignificant effect of competition was observed. There was a gradual decline in all attributes except height/plant as population density increased. These observations confirmed the occurrence of intraspecific competition in population of jute plant.
Key words: Intrapopulation, competition, jute plant, morphological and population density.
Journal Article•
TL;DR: Effect of allelochemicals on germination of the plants was less pronounced as compared to that on seedling growth and inhibition onGermination and seedling vigour in plants was higher in case of Capsularis jute leaf extracts.
Abstract: A study was conducted during 2007 to screen leaf leachates of jute (Corchorus capsularis L and C olitorius L) and sisal (Agave sisalana Perrine) for allelochemicals effect on germination and seedling growth of some test plants A rice (Oryza sativa L), wheat (Triticum aestivum L emeond Fiori & Paol) and (greengram [Vigna radiata (L) R wilczek] allelochemicals present in the leachates inhibited differentially the germination and growth of the plants Effect of allelochemicals on germination of the plants was less pronounced as compared to that on seedling growth Highest inhibition on germination (paddy seeds by about 28% over control) and seedling vigour (about 48 - 62% vigour loss over the control) in the plants was recorded in case of Capsularis jute leaf extracts Among the test plants, seedling growth of wheat was affected most by the leachates Similar effect on germination and seedling growth of plants was also recorded when leaf samples were incorporated into soil (1: 10, w/w)
Journal Article•
TL;DR: In this paper, a study was conducted during 2007 to screen leaf leachates of jute (Corchorus capsularis L. emeond) for allelochemicals effect on germination and seedling growth of some test plants.
Abstract: A study was conducted during 2007 to screen leaf leachates of jute (Corchorus capsularis L. and C. olitorius L.) and sisal (Agave sisalana Perrine) for allelochemicals effect on germination and seedling growth of some test plants. A rice (Oryza sativa L.), wheat (Triticum aestivum L. emeond. Fiori & Paol.) and (greengram [Vigna radiata (L.) R. wilczek] allelochemicals present in the leachates inhibited differentially the germination and growth of the plants. Effect of allelochemicals on germination of the plants was less pronounced as compared to that on seedling growth. Highest inhibition on germination (paddy seeds by about 28% over control) and seedling vigour (about 48 – 62% vigour loss over the control) in the plants was recorded in case of Capsularis jute leaf extracts. Among the test plants, seedling growth of wheat was affected most by the leachates. Similar effect on germination and seedling growth of plants was also recorded when leaf samples were incorporated into soil (1: 10, w/w).
Journal Article•
Journal Article•
TL;DR: Pre-chilling followed by exposure to a temperature higher than 30oC encourages germination of C. olitorius seeds and nursery establishment under such conditions may improve its length of availability.
Abstract: The wild leafy vegetable, Corchorus olitorius L, has a potential for development as a crop Self propagation of this species is by seed In an attempt to improve the length of time of its availability, the effects of pre-chilling and temperature on germination of its seeds were investigated Although it had a seed viability of 901% (using the tetrazolium technique), seed subjected to a temperature of 25oC for both pre-chilled and unchilled seeds showed no germination Seeds subjected to a temperature of 35oC did germinate with a maximum of 88% germination from seeds that had been pre-chilled for 3 ½ days compared to those which were unchilled, pre-chilled for a day or pre-chilled for 7 days Pre-chilling followed by exposure to a temperature higher than 30oC encourages germination of C olitorius seeds Nursery establishment under such conditions may improve its length of availability
01 Jan 2009
TL;DR: The study showed that stage of harvest influenced the nutritional value of the vegetable, Corchorus olitorius, which showed increases in dry matter, crude fiber, total ash, calcium and iron with increase in age.
Abstract: A household survey was carried out in Luanda division of Vihiga district to establish the extent of production and the time taken before first harvest of Corchorus olitorius. The vegetable was harvested from Maseno university’s experimental plots. The vegetable, Corchorus olitorius was harvested at the 4, 6, 8 and 10 weeks from planting. The fresh vegetable was analyzed for proximate composition, ascorbic acid, beta-carotene, the minerals, iron and calcium and the anti-nutrients total oxalates, total phenols and nitrates during the four growing stages. Results indicated that 99% of the households grew and consumed the vegetable. Harvesting of Corchorus olitorius started at 4 weeks from planting. The method of choice for cooking of the vegetable was boiling in plain water. The average proportion of cooking water was 875 milliliters, while the cooking-time averaged 40 minutes. About 27% of the households, however, reported adding ash filtrate from bean trash to the boiling water. Ashing helped to bring out the sometimes desired slimy taste of the cooked vegetables. Results from the laboratory analyses indicated that Corchorus olitorius gradually increased in dry matter, crude fiber, total ash, calcium and iron. Gradual reduction in crude lipid, and crude protein, during growth was established. Soluble carbohydrates, ascorbic acid, beta-carotene, nitrates, total phenols and total oxalates did not show any definite trend during the four growing stages. The study showed that stage of harvest influenced the nutritional value of the vegetable. The vegetable also showed increases in dry matter, crude fiber, total ash, calcium and iron with increase in age.