salinity of animal manure and potential risk of secondary soil salinization through successive manure enhance animal productivity and maximize economic returns, mineral salts are routinely added to animal feed worldwide. salinity and ionic composition of animal manure from intensive poultry and livestock farms in guangdong province were investigated. field experiments were conducted for six successive crops of brassica parachinensis to evaluate the possibility of secondary soil salinization by successive application of chicken manure (cm) and pigeon manure (pm) to a garden soil. the concentra ...200717572477
[yield and heavy metal content of brassica parachinensis influenced by successive application of chicken manure].high heavy metal content in animal manures commonly occurs in the world since microelement additives are widely used in intensive animal production. successive field trials in brassica parachinensis (bp) were conducted to investigate the influence of successive application of chicken manure (at the rate of) on the yield and heavy metal content of bp. the application rate of chicken manure was calculated by its n content and ranged from n 0-450 kg x hm(-2). the results indicate that compared to s ...200717633188
polycyclic aromatic hydrocarbons and phthalic acid esters in vegetables from nine farms of the pearl river delta, south china.this study investigated the occurrence of 16 polycyclic aromatic hydrocarbons (pahs) and 6 phthalic acid esters (paes) in 11 vegetable species collected from nine farms of the pearl river delta, south china. twelve pah compounds and all pae compounds were detected by gas chromatography coupled with mass spectrometry (gc-ms) in vegetables. the total concentrations of pahs (sigma(pahs)) and paes (sigma(paes)) ranged from 7.0 to 5353 microg kg(-1) dry weight (d.w.), with a mean value of 1173 microg ...200918491175
brwrky65, a wrky transcription factor, is involved in regulating three leaf senescence-associated genes in chinese flowering cabbage.plant-specific wrky transcription factors (tfs) have been implicated to function as regulators of leaf senescence, but their association with postharvest leaf senescence of economically important leafy vegetables, is poorly understood. in this work, the characterization of a group iie wrky tf, brwrky65, from chinese flowering cabbage (brassica rapa var. parachinensis) is reported. the expression of brwrky65 was up-regulated following leaf chlorophyll degradation and yellowing during postharvest ...028594365
correlation of leaf senescence and gene expression/activities of chlorophyll degradation enzymes in harvested chinese flowering cabbage (brassica rapa var. parachinensis).chinese flowering cabbage is one of the main leafy vegetables produced in china. they have a rapid leaf yellowing due to chlorophyll degradation after harvest that limits their marketing. in the present study, leaf senescence of the cabbages was manipulated by ethylene and 6-benzyl aminopurine (6-ba) treatment to investigate the correlation of leaf senescence and chlorophyll degradation related to gene expression/activities in the darkness. the patterns of several senescence associated markers, ...201121820757
exposure factors for wastewater-irrigated asian vegetables and a probabilistic rotavirus disease burden model for their consumption.many farmers in water-scarce regions of developing countries use wastewater to irrigate vegetables and other agricultural crops, a practice that may expand with climate change. there are a number of health risks associated with wastewater irrigation for human food crops, particularly with surface irrigation techniques common in the developing world. the world health organization (who) recommends using quantitative microbial risk assessment (qmra) to determine if the irrigation scheme meets healt ...201424576153
effects of composting on phytotoxicity of spent pig-manure sawdust litter.the phytotoxicity of spent pig-manure sawdust litter (spent litter) was evaluated during further composting. aqueous extracts of the spent litter were prepared by shaking the sample with water (1:10 w/v), and the toxicity of these extracts was determined on relative seed germination, relative root elongation and germination index (gi, a factor of relative seed germination and relative root elongation). the sensitivity of six plant species, namely brassica parachinensis (chinese cabbage), brassic ...199615093523
the trypsin-inhibitory, immunostimulatory and antiproliferative activities of a napin-like polypeptide from chinese cabbage seeds.a heterodimeric 13.8 kda napin-like polypeptide has previously been isolated from chinese cabbage (brassica parachinensis) seeds with a procedure involving ion exchange chromatography on deae-cellulose, affinity chromatography on affi-gel blue gel, fplc-ion exchange chromatography on mono s and fplc-gel filtration on superdex 75. in the present study the n-terminal sequence of the 8.8 kda subunit of the polypeptide (pqgpqqrppkllqqqtneehe) was found to have pronounced homology to napins, albumins ...200414994988
hong kong: country the 1840s, the small fishing community that is now hong kong became a british colony and an important naval base for the opium wars. now it is a leading capitalist center operating on mainland communist china. hong kong is scheduled to go back to china in 1997. in the agreement signed between the british government and china, hong kong's present lifestyle is guaranteed for at least 50 years. textbook colonialism rules here. foreigners hold the key jobs and earn much more than do the indi ...198812282043
extracts of tsai tai (brassica chinensis): enhanced antioxidant activity and anti-aging effects both in vitro and in caenorhabditis elegans.tsai tai is one of the most widely consumed brassica vegetables in asian countries because of its good taste and its nutritional benefits. this study evaluated the antioxidant capacity and possible associated health benefits of 3 tsai tai (brassica chinensis) varieties, namely, hon tsai tai, pak choi and choi sum. the dpph radical scavenging ability and reducing power assays were performed to evaluate the in vitro activities of the extracts. caenorhabditis elegans was used as an in vivo model fo ...026726147
variations in microbial community and ciprofloxacin removal in rhizospheric soils between two cultivars of brassica parachinensis l.ciprofloxacin (cip) is one of most used quinolone antibiotics detected frequently in agricultural soils and vegetables. in the present study, variations in microbial community and cip removal in rhizospheric soils between two cultivars of brassica parachinensis l. that accumulate higher and lower cip (sijiu and cutai, respectively) were investigated under cip stress (0mg/kg in ck, 2.94mg/kg in t1, and 67.11mg/kg in t2). the removal rates of cip in rhizospheric soils of cultivar sijiu were higher ...028623792
variations in phthalate ester (pae) accumulation and their formation mechanism in chinese flowering cabbage (brassica parachinensis l.) cultivars grown on pae-contaminated soils.phthalate ester (pae) accumulation in crops poses great risks to human health and has aroused great concern. here, we investigated variations in di-n-butylphthalate (dbp) and di-(2-ethylhexyl) phthalate (dehp) accumulation by various chinese flowering cabbage cultivars and revealed their variation mechanism. there were significant differences (p < 0.05) in shoot pae concentrations of 28 cultivars. moreover, significant positive correlations between dbp and dehp concentrations in shoots of all cu ...201526160669
physiological differences in response to di-n-butyl phthalate (dbp) exposure between low- and high-dbp accumulating cultivars of chinese flowering cabbage (brassica parachinensis l.).to increase understanding on the mechanisms of cultivar difference in contaminant accumulation in crops, this study was designed to compare the physiological responses to di-n-butyl phthalate (dbp) exposure between low (lvbao70) and high (huaguan) dbp cultivars of chinese flowering cabbage (brassica parachinensis l.). under high dbp exposure, significant differences in various physiological responses were observed between the two cultivars, which might account for the variation in dbp accumulati ...201626608873
in vivo tracing of organophosphorus pesticides in cabbage (brassica parachinensis) and aloe (barbadensis).in vivo solid-phase microextraction (spme) sampling method coupled with gas chromatography-mass spectrometry (gc-ms) analysis was employed to trace the uptake and elimination of organophosphorus pesticides (opps) in two kinds of edible plants, cabbage (brassica parachinensis) and aloe (barbadensis). the metabolism of fenthion in aloe was also investigated by the liquid chromatography tandem mass spectrometry analysis (lc-ms/ms) to understand the fate of opps in living plants better. transpiratio ...201626878720
low-molecular-weight organic acids correlate with cultivar variation in ciprofloxacin accumulation in brassica parachinensis understand the mechanism controlling cultivar differences in the accumulation of ciprofloxacin (cip) in chinese flowering cabbage (brassica parachinensis l.), low-molecular-weight organic acids (lmwoas) secreted from the roots of high- and low-cip cultivars (sijiu and cutai, respectively) and their effects on the bioavailability of cip in soil were investigated. significant differences in the content of lmwoas (especially maleic acid) between the two cultivars played a key role in the variati ...201728860530
isolation of a napin-like polypeptide with potent translation-inhibitory activity from chinese cabbage (brassica parachinensis cv green-stalked) seeds.a heterodimeric napin-like polypeptide was isolated from brassica parachinensis seeds with a procedure involving ion exchange chromatography on deae-cellulose, affinity chromatography on affi-gel blue gel, fplc-ion exchange chromatography on mono s and fplc-gel filtration on superdex 75. the n-terminal sequence of the 5 kda subunit of the polypeptide (pagpfripkkrkkee) showed high homology with other 2s storage proteins like napins and albumins. the polypeptide potently inhibited translation in a ...200312916641
phytoremediation of sewage sludge and use of its leachate for crop production.the land application of sewage sludge has the potential risk of transferring heavy metals to soil or groundwater. the agricultural reuse of sludge leachate could be a cost-effective way to decrease metal contamination. sludge leachate collected during the phytoremediation of sludge by co-cropping with sedum alfredii and zea mays was used for irrigating vegetables in a field experiment. results indicate that the concentrations of cu, zn, pb, and cd in sludge leachates complied with the national s ...201525205245
effects of phosphorus supplied in soil on subcellular distribution and chemical forms of cadmium in two chinese flowering cabbage (brassica parachinensis l.) cultivars differing in cadmium accumulation.differences in the subcellular distribution and chemical speciation of cd between two chinese flowering cabbage (brassica parachinensis l.) cultivars, lubao70 (lb70, low-cd cultivar) and chixinno.4 (cx4, high-cd cultivar) were investigated under various soil cd and p treatments. subcellular fractionation of cd-containing tissues showed that a higher proportion of cd was bound to the cell wall fraction of lb70 than that of cx4, indicating that cd compartment functioned better in lb70. compared to ...201121693161
brassiparin, an antifungal peptide from brassica parachinensis isolate and characterize an antifungal peptide from the seeds of brassica parachinensis l.h.bailey.200919200321
[effects of colletotrichum higginsianum infection on endogenous hormones in brassica parachinensis leaves under different nitrogen nutrition].this paper studied the effects of colletotrichum higginsianum infection on the ethylene production and the contents of abscisic acid (aba) and indole-3-acetic acid (iaa) in leaves of flowering chinese cabbage (brassica parachinensis) under six levels of nitrogen (n) nutrition, and their relations to disease-resistance. the results showed that the ethylene production in all n treatments had a mono-peak curve change, and reached the maximum 4-6 days after inoculation. in comparing with high n or n ...200516110672
chromatographic separation of a small subunit (psbw/psay) and its assignment to photosystem i reaction using a hydroxyapatite column, the five major photosystem i (psi) subunits (psaa,-b,-c,-d,-e) solubilized by sodium dodecyl sulfate (sds) were fractionated from a spinach psi reaction center preparation. another small (5-6 kda) polypeptide was also separated, and purified to homogeneity. mass spectroscopy yielded its molecular weight to be 5942 +/- 10. this polypeptide had an n-terminal sequence homologous to those of previously reported 5-kda subunits from spinach and wheat and a 6.1-kda sub ...200010924904
[difference of root anatomy characteristics and its effect on dehp accumulation in two genotypes of brassica parachinensis].two genotypes of brassica parachinensis, dehp high-accumulation of youqing-60 and low-accumulation of teqing-60, were grown in hydroponic systems contaminated with dehp (20 and 50 mg x l(-1)). anatomy of roots was measured, and their effects on uptake of dehp in roots and shoots were discussed. the results showed that roots anatomy of two genotypes of brassica parachinensis and their responds to dehp pollution were significantly different. dehp contents in roots and shoots of youqing-60 were mai ...201021090323
morphological and functional characterization of bcmf13 in the antisense-silenced plants of brassica campestris ssp. chinensis var. parachinensis.the gene brassica campestris male fertility 13 (bcmf13, genbank accession number ef158459) was isolated as a reproductive organ-specific gene from chinese cabbage (brassica campestris l. ssp. chinensis makino, syn. b. rapa ssp. chinensis). it is exclusively expressed in stage four and five flower buds of fertile lines and is most strongly expressed in stamens. here, we report a functional characterization of this bcmf13 gene in the antisense-silenced plants. the inflorescence of the bcmf13 mutan ...200918592396
cadmium uptake potential of brassica napus cocropped with brassica parachinensis and zea mays.cadmium uptake potential of brassica napus co-cropped with b. parachinensis or zea mays plants in split pot (allow the solutes to pass but prevent the interaction of roots between compartments) experiments was evaluated. plants were grown in split pots filled with soil spiked at 0, 3, 6, 12, 25 and 50 mg cd/kg soil. biomass and cd uptake were determined after 6 weeks, and rhizospheric soil solutions, extracted using soil probes, were analyzed for ph and water soluble cd at weekly intervals. cadm ...200919185420
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