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Wang W.,Central China Normal University | Wang W.,Xi'an Modern Chemistry Research Institute | Zhang S.-S.,Central China Normal University | Zhou Y.,Central China Normal University | And 3 more authors.
Journal of Agricultural and Food Chemistry | Year: 2016

On the basis of our work on the modification of alkylphosphonates 1, a series of α-(substituted phenoxybutyryloxy or valeryloxy)alkylphosphonates (4-5) and 2-(substituted phenoxybutyryloxy)alkyl-5,5-dimethyl-1,3,2-dioxaphosphinan-2-one (6) were designed and synthesized. The bioassay results indicated that 14 of title compounds 4 exhibited significant postemergence herbicidal activity against velvetleaf, common amaranth, and false daisy at 150 g ai/ha. Compounds 5 were inactive against all tested weeds. Compounds 6 exhibited moderate to good inhibitory effect against the tested dicotyledonous weeds. Structure-activity relationship (SAR) analyses showed that the length of the carbon chain as linking bridge had a great effect on the herbicidal activity. Broad-spectrum tests of compounds 4-1, 4-2, 4-9, 4-30, and 4-36 were carried out at 75 g ai/ha. Especially, 4-1 exhibited 100% inhibition activity against the tested dicotyledonous weeds, which was higher than that of glyphosate. © 2016 American Chemical Society.


PubMed | Taian Academy of Agricultural science and Central China Normal University
Type: Journal Article | Journal: Journal of agricultural and food chemistry | Year: 2016

On the basis of our work on the modification of alkylphosphonates 1, a series of -(substituted phenoxybutyryloxy or valeryloxy)alkylphosphonates (4-5) and 2-(substituted phenoxybutyryloxy)alkyl-5,5-dimethyl-1,3,2-dioxaphosphinan-2-one (6) were designed and synthesized. The bioassay results indicated that 14 of title compounds 4 exhibited significant postemergence herbicidal activity against velvetleaf, common amaranth, and false daisy at 150 g ai/ha. Compounds 5 were inactive against all tested weeds. Compounds 6 exhibited moderate to good inhibitory effect against the tested dicotyledonous weeds. Structure-activity relationship (SAR) analyses showed that the length of the carbon chain as linking bridge had a great effect on the herbicidal activity. Broad-spectrum tests of compounds 4-1, 4-2, 4-9, 4-30, and 4-36 were carried out at 75 g ai/ha. Especially, 4-1 exhibited 100% inhibition activity against the tested dicotyledonous weeds, which was higher than that of glyphosate.


Gong X.-P.,Shandong Agricultural University | Liang X.,Caoxian Bureau of Agriculture | Wu C.-H.,Shandong Agricultural University | Guo Y.,Shandong Agricultural University | And 5 more authors.
Journal of Plant Nutrition | Year: 2016

A nutrient solution culture experiment was conducted in the greenhouse to investigate the effects of selenium (Se) on biomass and the mineral nutrient efficiency of macroelements phosphorus, potassium, calcium and magnesium (P, K, Ca and Mg) and microelements iron, manganese, copper and zinc (Fe, Mn, Cu and Zn) in wheat at the seedling stage using a set of recombinant inbred lines (RILs). Quantitative trait locus (QTL) analysis was also performed for all 60 traits. The results showed that 0.1 μmol/L Se can significantly affect the phenotypic traits relation to biomass and nutrient efficiency and the corresponding QTLs. A total of 260 QTLs were located on 19 chromosomes, and 96.54% of these QTLs were only detected in one treatment. A total of 23 important QTL clusters and 31 cooperative uptake and utilization (CUU) loci that colocalized with QTLs for nutrient uptake and/or utilization of at least two elements were also identified. These CUU loci involved 190 out of the 248 QTLs (76.66%) for nutrient efficiency traits, indicating that CUU-QTLs were common for macroelements (P, K, Ca and Mg) and microelements (Fe, Mn, Cu and Zn). Additionally, these loci may be hot spots for genetic control of mineral nutrient efficiency traits. © 2016, © Taylor & Francis.


Guo Y.,Shandong Agricultural University | Guo Y.,Taian Academy of Agricultural science | Sun J.,Shandong Agricultural University | Zhang G.,Shandong Agricultural University | And 5 more authors.
Field Crops Research | Year: 2013

Glutamine synthetase (GS) is a key enzyme in the formation of the amino acid glutamine during N assimilation. The characterization of GS genes and the development of functional markers are important for marker-assisted selection (MAS) in wheat breeding programs. In the present study, the full-length genomic DNA (gDNA) sequence of TaGS1a was obtained from 60 wheat varieties. TaGS1a comprises 3415. bp and has eleven exons and ten introns. Nine single nucleotide polymorphisms (SNPs) and two insertions and deletions of DNA segments (InDels) were detected in introns, resulting two haplotypes: Hap 1 and Hap 2. A cleaved amplified polymorphic sequence (CAPS) marker was developed to distinguish the two haplotypes. The TaGS1a-CAPS marker was located on chromosome 6D using Chinese Spring nullisomic-tetrasomic lines, and mapped at 2.5 cM from the SSR marker barc1121b in a RIL population. The completely corresponding results between quantitative trait locus (QTL) analysis and association analysis suggested that the TaGS1a gene had functions for grain size traits, including thousand grain weight (TGW), grain width (GW), grain height (GH), GL/GW ratio (GLW), factor form density (FFD), grain area (GA) and grain volume (GV) during maturity stage, and for the ratio of root/shoot for dry weight and nitrogen, phosphorus, potassium contents (RSDW, RSNC, RSPC and RSKC) during seedling stage. © 2013 Elsevier B.V.


Kong F.-M.,Shandong Agricultural University | Guo Y.,Shandong Agricultural University | Guo Y.,Taian Academy of Agricultural Science | Liang X.,Shandong Agricultural University | And 5 more authors.
Plant and Soil | Year: 2013

Aims: Potassium (K) is one of the most important mineral nutrients limiting plant growth in agricultural systems. This study investigated the effects of low-K treatments and detected quantitative trait loci (QTLs) for K efficiency traits at the seedling and adult stages of wheat. Methods: Eleven seedling traits under a hydroponic culture trial with five K treatments and nine adult traits in a pot trial and a field trial with three K treatments were investigated using a set of wheat recombinant inbred lines (RILs). Results: Values of most of the seedling and adult traits decreased with decreasing K supply, but the K-use efficiency and ratio of dry weight between seedling roots and shoots (RSDW) increased. A total of 87 QTLs for seedling traits in the hydroponic culture trial and 51 and 29 QTLs for adult traits in the pot and field trials, respectively, were detected. We also identified 15 relatively high-frequency QTLs (RHF-QTLs) which can be detected in over half of the treatments and 21 QTL clusters which is defined as the co-location of QTLs for more than two traits. Conclusions: K efficiency traits and the related QTLs of wheat were greatly affected by K treatments. Several relatively stable QTLs and important QTL clusters may be potential targets for marker-assisted selection for wheat nutrient efficiency. © 2013 Springer Science+Business Media Dordrecht.


SUN X.,Taian Academy Of Agricultural Science | SUN X.,Shandong Agricultural University | WU K.,Taian Academy Of Agricultural Science | ZHAO Y.,Shandong Agricultural University | And 5 more authors.
Journal of Genetics | Year: 2016

Grain protein content (GPC) and flour whiteness degree (FWD) are important qualitative traits in common wheat. Quantitative trait locus (QTL) mapping for GPC and FWD was conducted using a set of 131 recombinant-inbred lines derived from the cross ‘Chuan 35050 × Shannong 483’ in six environmental conditions. A total of 22 putative QTLs (nine GPC and 13 FWD) were identified on 12 chromosomes with individual QTL explaining 4.5–34.0% phenotypic variation. Nine QTLs (40.9%) were detected in two or more environments. The colocated QTLs were on chromosomes 1B and 4B. Among the QTLs identified for GPC, QGpc.sdau-4A from the parent Shannong 483 represented some important favourable QTL alleles. QGpc.sdau-2A.1 and QFwd.sdau-2A.1 had a significant association with both GPC and FWD. The markers detected on top of QTL regions could be potential targets for marker-assisted selection. © 2016 Indian Academy of Sciences


Sun Y.,Shandong Agricultural University | Liu Z.,Taian Academy of Agricultural science | Wang J.,Shandong Agricultural University | Yang S.,Shandong Agricultural University | And 2 more authors.
Ultrasonics Sonochemistry | Year: 2013

In this study, an aqueous ionic liquid based ultrasonic assisted extraction (ILUAE) method for the extraction of the four acetophenones, namely 4-hydroxyacetophenone (1), 2,5-dihydroxyacetophenone (2), baishouwubenzophenone (3) and 2,4-dihydroxyacetophenone (4) from the Chinese medicinal plant Cynanchum bungei was developed. Three kinds of aqueous l-alkyl-3-methylimidazolium ionic liquids with different anion and alkyl chain were investigated. The results indicated that ionic liquids (ILs) showed remarkable effects on the extraction efficiency of acetophenones. In addition, the ILUAE, including several ultrasonic parameters, such as the ILs concentration, solvent to solid ratio, power, particle size, temperature, and extraction time have been optimized. Under these optimal conditions (e.g., with 0.6 M [C4MIM]BF 4, solvent to solid ratio of 35:1, power of 175 W, particle size of 60-80 mesh, temperature of 25 °C and time of 50 min), this approach gained the highest extraction yields of four acetophenones 286.15, 21.65, 632.58 and 205.38 μg/g, respectively. The proposed approach has been evaluated by comparison with the conventional heat-reflux extraction (HRE) and regular UAE. The results indicated that ILUAE is an alternative method for extracting acetophenones from C. bungei. © 2012 Elsevier B.V. All rights reserved.


Zhang Z.,Shandong Agricultural University | Zhou C.,Taian Academy of Agricultural science | Xu Y.,Shandong Agricultural University | Huang X.,Shandong Agricultural University | And 2 more authors.
Journal of Pest Science | Year: 2016

Tea plants (Camellia sinensis (L.) O. Kuntze) are often colonized by economically important insect pests such as tea green leafhoppers (Empoasca onukii Matsuda) and green plant bugs (Apolygus lucorum Meyer-Dür) in northern China. Aromatic plant volatiles can exert repellent effects on insect herbivores. To evaluate the impact of intercropping on the populations of two tea pests and natural enemies in tea plantations, field experiments were conducted in which four aromatic plants (Cassia tora, Medicago sativa, Leonurus artemisia, and Mentha haplocalyx) were intercropped with tea plants and compared with tea monoculture in 2014 and 2015. The counts of arthropods conducted on tea plants showed that intercropping C. tora and L. artemisia with tea plants significantly reduced the E. onukii population levels in the tea plantation. The abundance of A. lucorum was variable during the study and not significantly lower in various intercropping plots than monocropping plots. Y-tube olfactometer assays showed that volatile organic compounds derived from C. tora and M. sativa significantly affected the behavior of E. onukii and that M. haplocalyx odors can be used to mask host plant odors and are repellent to A. lucorum. Among natural enemies, coccinellids occurred often on tea plants during growing seasons. Intercropping tea plants with C. tora also promoted a marked increase in the natural enemies of tea pests, including coccinellids, lacewings, spiders, and parasitoids. Our findings suggest that the sustainable pest management achieved by intercropping offers an alternative strategy for the control of important tea pests. © 2016 Springer-Verlag Berlin Heidelberg


Liu Z.,Taian Academy of Agricultural science | Wang J.,Shandong Agricultural University | Bi J.,Taian Academy of Agricultural science | Bi Y.,Taian Academy of Agricultural science | And 3 more authors.
Separation Science and Technology | Year: 2011

Supercritical fluid extraction (SFE) was used to extract three isoflavonoids including irigenin, irisfloretin and dichtomitin from Belamcanda chinensis (L.) DC. The parameters including pressure, temperature, sample particle size, and flow rate of CO 2 were optimized with an orthogonal test. Under the optimized conditions of 15 MPa, 55°C, a sample particle size of 20-40 mesh and CO 2 flow rate of 40 L h -1. The process was then scaled up by 10 times using a preparative SFE system. The yield of the crude extract from SFE was 4.1%, which contained irigenin, irisfloretin, and dichtomitin 0.71%, 0.49%, and 0.05%, respectively. To compare the extraction methods, Soxhlet Extraction (SE) was performed. The results indicated that SFE was better than SE. Irigenin, irisfloretin, and dichtomitin in the SFE extract were then separated and purified by high-speed counter-current chromatography (HSCCC) with a two-phase solvent system composed of petroleum ether-ethyl acetate-methanol-water (2:4:3:3, v/v). From 5.0 g of dry crude extract, 27.8 mg irigenin, 16.4 mg irisfloretin, and 2.1 mg dichtomitin were obtained at purities of 97.1%, 96.4%, and 98.0%, respectively, as determined by HPLC-PDA. These results well indicate that SFE and HSCCC are very powerful techniques for the extraction and purification of irigenin, irisfloretin, and dichtomitin from B. chinensis. © 2011 Taylor and Francis Group, LLC.


Sun Y.,Shandong Agricultural University | Liu Z.,Taian Academy of Agricultural science | Wang J.,Shandong Agricultural University
Separation and Purification Technology | Year: 2011

This study investigated the use of ultrasound-assisted extraction (UAE) to improve the extraction efficiency of the classical solvent extraction techniques such as maceration extraction (ME) and soxhlet extraction (SE) to extract five isoflavones (tectoridin, iristectorin B, iristectorin A, tectorigenin and iristectorigenin A) from Iris tectorum. The effects of various factors such as extraction solvent, solvent concentration, temperature, solvent to solid ratio, ultrasound power, extraction time and particle size on the yield of target components were investigated. The optimal UAE conditions found were: 70% (v/v) methanol solution, temperature 45 °C, solvent to solid ratio 15 ml/g, ultrasound power 150 W, extraction time 45 min and particle size 60-80 mesh. The results indicated that compared with ME at 18 h and SE at 6 h, UAE gave the highest extraction yields of tectoridin, iristectorin B, iristectorin A, tectorigenin, iristectorigenin A and total isoflavones at 45 min. The results indicated that UAE was an alternative method for extracting isoflavones from I. tectorum. © 2011 Elsevier B.V. All rights reserved.

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