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Zhao P, Liu WS, Hao XQ, Yu MQ. [Cone-beam CT imaging characteristics of type Ⅰ dentin dysplasia during the dental replacement period]. Zhonghua Kou Qiang Yi Xue Za Zhi 2024; 59:259-262. [PMID: 38432658 DOI: 10.3760/cma.j.cn112144-20231017-00201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Affiliation(s)
- P Zhao
- Department of Medical Imaging, School and Hospital of Stomatology, Hebei Medical University & Hebei Key Laboratory of Stomatology & Hebei Clinical Research Center for Oral Diseases, Shijiazhuang 050017, China
| | - W S Liu
- Department of Medical Imaging, School and Hospital of Stomatology, Hebei Medical University & Hebei Key Laboratory of Stomatology & Hebei Clinical Research Center for Oral Diseases, Shijiazhuang 050017, China
| | - X Q Hao
- Department of Medical Imaging, School and Hospital of Stomatology, Hebei Medical University & Hebei Key Laboratory of Stomatology & Hebei Clinical Research Center for Oral Diseases, Shijiazhuang 050017, China
| | - M Q Yu
- Department of Medical Imaging, School and Hospital of Stomatology, Hebei Medical University & Hebei Key Laboratory of Stomatology & Hebei Clinical Research Center for Oral Diseases, Shijiazhuang 050017, China
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Sheng F, Liu SY, Zhang T, Yu MQ. Runoff effect of precipitation variation and landscape pattern evolution in Lianshui watershed, Jiangxi, China. Ying Yong Sheng Tai Xue Bao 2023; 34:196-202. [PMID: 36799394 DOI: 10.13287/j.1001-9332.202301.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Precipitation and landscape pattern are two main factors affecting runoff process of the watershed. Understanding their runoff effect is of great significance to water resources management and ecological construction of watershed. Based on the data of precipitation, runoff, and land use from 1958 to 2020, we analyzed the characteristics of precipitation, landscape pattern and runoff in Lianshui watershed in red soil hilly area of southern Jiangxi Pro-vince, established the relationship between precipitation, landscape pattern and annual runoff, flood runoff, low runoff, respectively. The results showed that the annual precipitation, runoff and annual maximum one-day runoff in the watershed showed a non-significant downward trend during the study period, while the annual minimum one-day runoff showed a non-significant upward trend but with the largest inter-annual variation range. Forested land was the landscape type with the highest proportion in watershed, and other woodland had the most dramatic variation. At the landscape level, Shannon diversity index, Shannon evenness index, patch density and landscape shape index increased from 1.125, 0.541, 0.667 and 16.925 in 1980 to 1.348, 0.614, 0.731 and 18.172 in 2020, respectively, while the landscape contagion index decreased from 68.237 in 1980 to 64.293 in 2020. The overall landscape diversity, fragmentation degree and shape complexity of the watershed increased, the spatial distribution tended to be uniform, and the connectivity decreased. The correlation coefficients between precipitation and annual runoff, flood runoff, low runoff were 0.907, 0.594 and 0.558, respectively. At the class level, the reduction of cultivated land had a greater impact on annual runoff, flood runoff, and low runoff, while the overall change at the landscape level promoted a decrease in annual runoff and flood runoff and an increase in low runoff. The contribution rate of precipitation variation and landscape pattern evolution to the change of annual runoff, flood runoff ,and low runoff were 17.8%, 82.2% and 1.5%, 98.5% and -8.8%, 108.8%, respectively. Our results could provide theoretical refe-rence for landscape pattern allocation and comprehensive management of soil and water loss.
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Affiliation(s)
- Fei Sheng
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.,Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Shi-Yu Liu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.,Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Ting Zhang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.,Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Min-Qi Yu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.,Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
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Li J, Sheng F, Liu SY, Zhang T, Yu MQ. [Baseflow variation and its response to precipitation in Jiuqushui watershed, Southern Jiangxi Province, China]. Ying Yong Sheng Tai Xue Bao 2022; 33:2251-2259. [PMID: 36043834 DOI: 10.13287/j.1001-9332.202208.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Baseflow is an important part of water resources. Exploring the characteristics of baseflow and its response to precipitation is of great significance to optimize the partition of water resources. Based on the data of daily precipitation and runoff from 1982 to 2019 in Jiuqushui watershed, we analyzed the characteristics of baseflow change, investigated the time lag effect of baseflow on precipitation, and calculated the contribution rate of precipitation to baseflow change by using digital filtering method, cross wavelet transform method, and slope change ratio of accumulative quantity method. The results showed that during the study period, the variation trend of annual baseflow depth and annual baseflow index was not significant, with annual average values of 384.21 mm and 0.44, respectively. The depth of baseflow in spring and summer was greater than that in autumn and winter, while the baseflow index showed an opposite pattern. Annual precipitation affected the dynamic change of annual baseflow depth, with the effects in spring and summer being stronger than that in autumn and winter. The lag time of baseflow in spring, summer, autumn and winter were 3.5-10.3, 1.5-8.5, 2-10, 2-13 and 5-20.5 days, while the average annual lag time was 6.4, 4.9, 5.3, 6.8 and 10.8 days, respectively. The annual baseflow depth changed abruptly in 1992. The contribution rate of precipitation to baseflow change was 68.2%, and that of other factors was 31.8%. The results could provide scientific basis for evaluating the hydrological effects of forests and ensuring water ecological security of rivers in the red soil region of southern China.
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Affiliation(s)
- Jun Li
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Fei Sheng
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Shi-Yu Liu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Ting Zhang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
| | - Min-Qi Yu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China
- Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Nanchang 330045, China
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Chen WY, Liu ZM, Deng GB, Pan ZF, Liang JJ, Zeng XQ, Tashi NM, Long H, Yu MQ. Genetic relationship between lodging and lodging components in barley (Hordeum vulgare) based on unconditional and conditional quantitative trait locus analyses. Genet Mol Res 2014; 13:1909-25. [PMID: 24668679 DOI: 10.4238/2014.march.17.19] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Lodging (LD) is a major constraint limiting the yield and forage quality of barley. Detailed analyses of LD component (LDC) traits were conducted using 246 F2 plants generated from a cross between cultivars ZQ320 and 1277. Genetic relationships between LD and LDC were evaluated by unconditional and conditional quantitative trait locus (QTL) mapping with 117 simple sequence repeat markers. Ultimately, 53 unconditional QTL related to LD were identified on seven barley chromosomes. Up to 15 QTL accounted for over 10% of the phenotypic variation, and up to 20 QTL for culm strength were detected. Six QTL with pleiotropic effects showing significant negative correlations with LD were found between markers Bmag353 and GBM1482 on chromosome 4H. These alleles and alleles of QTL for wall thickness, culm strength, plant height, and plant weight originated from ZQ320. Conditional mapping identified 96 additional QTL for LD. Conditional QTL analysis demonstrated that plant height, plant height center of gravity, and length of the sixth internode had the greatest contribution to LD, whereas culm strength and length of the fourth internode, and culm strength of the second internode were the key factors for LD-resistant. Therefore, lodging resistance in barley can be improved based on selection of alleles affecting culm strength, wall thickness, plant height, and plant weight. The conditional QTL mapping method can be used to evaluate possible genetic relationships between LD and LDC while efficiently and precisely determining counteracting QTL, which will help in understanding the genetic basis of LD in barley.
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Affiliation(s)
- W Y Chen
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - Z M Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - G B Deng
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - Z F Pan
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - J J Liang
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - X Q Zeng
- Tibet Academy of Agriculture and Animal Sciences, Lhasa, China
| | - N M Tashi
- Tibet Academy of Agriculture and Animal Sciences, Lhasa, China
| | - H Long
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
| | - M Q Yu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Renmin South Road, Chengdu, China
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Ma LY, Liu RH, Xu XD, Yu MQ, Zhang Q, Liu HL. The pharmacokinetics of C-glycosyl flavones of Hawthorn leaf flavonoids in rat after single dose oral administration. Phytomedicine 2010; 17:640-645. [PMID: 20096549 DOI: 10.1016/j.phymed.2009.12.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Revised: 10/26/2009] [Accepted: 12/15/2009] [Indexed: 05/28/2023]
Abstract
Hawthorn leaf flavonoids (HLF) are used in the treatment of cardiovascular diseases. Various potential pharmacodynamic effects have been observed for vitexin-4''-O-glucoside (VOG) and vitexin-2''-O-rhamnoside (VOR) which are the main constituents of HLF. The aim of this study was to investigate the pharmacokinetics of VOG and VOR when a single dose of HLF was administrated orally. The levels of VOG and VOR in plasma, tissues (heart, liver, spleen, lung, kidney and brain), bile, urine and feces were measured by HPLC-UV. The results showed that VOG and VOR have the similar pharmacokinetics. Both of them were absorbed quickly into plasma with maximal plasma concentrations of VOG and VOR being reached within 0.75 h. The mean elimination half-life (t(1/2)) of VOG and VOR were 2.53 h and 2.32 h, respectively. High levels of tissue distribution of VOG and VOR were observed in liver and kidney. No VOG and VOR were detected in brain tissue. There was no long-term accumulation of VOG and VOR in rat tissues examined. The total recovery of the dose in 24 hours was 64.91% (0.70% in urine; 64.21% in feces) for VOG and 89.01% (0.72% in urine; 88.29% in feces) for VOR. The cumulative VOG and VOR excreted in bile represented 0.58% and 13.38% of the doses, respectively. VOG and VOR in HLF were not efficiently absorbed in the rodent gastrointestinal tract.
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Affiliation(s)
- L Y Ma
- Department of Pharmacology, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China.
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Zhai XG, Zhao T, Liu YH, Long H, Deng GB, Pan ZF, Yu MQ. [Characterization and expression profiling of a novel cereal cyst nematode resistance gene analog in wheat]. Mol Biol (Mosk) 2008; 42:1079-1084. [PMID: 19140329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Based on the conserved regions of known resistance genes, a NBS-LRR type CCN resistance gene analog was isolated from the CCN resistant E-10 near isogenic lines (NILs) of wheat, designated as CreZ (GenBank Acc. N: EU327996). It contained a complete ORF that was 2775 bp in length and encoded 924 amino acids. Sequence comparison indicated that it shared 92% nucleotide and 87% amino acid identity with those of the known CCN-resistance gene Cre3 and had similar characteristic conserved motifs as those in other established NBS-LRR disease resistance genes. The expression profiling of CreZ indicated that it was specifically expressed in the roots of resistant plants and real-time PCR analysis demonstrated that expression levels drastically increased when the plants were inoculated with cereal cyst nematodes. It could be inferred, then, that CreZ belongs to the NBS-LRR resistance gene family and is a candidate gene for potential resistance to the cereal cyst nematode.
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Han ZX, Qian G, Wu F, Pan ZF, Deng GB, Yu MQ. [Sequences variation and classification of B-hordein genes in hull-less barley from Qinghai-Tibet Plateau]. Mol Biol (Mosk) 2008; 42:63-70. [PMID: 18389621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The goal of this study is to understand the evolution relationship of the members of B-hordein gene family in hull-less barley by analysis of their structure and to explore their utility in grain quality improvement. Six copies of B-hordein gene (Hn1-Hn3, Hn7-Hn9) were cloned from six hull-less barley cultivars collected from Qinghai-Tibet Plateau and molecularly characterized. Comparison of their predicted polypeptide sequences with the published suggested that they all share the same basic protein structures. In addition, we found that the C-terminal end sequences of all B-hordeins shared a similar feature. In the six clones and the other three published (Hn4, Hn5 and Hn6) from hull-less barley, Hn2 and Hn7 contained identical C-terminal end sequence DIMPVDFWH, Hn3, Hn4, Hn5, Hn8 and Hn9 also shared the common sequence DIMPPDFWH, which was similar to that of a B-hordein reported previously. Both Hnl and Hn6 exhibited differences in their C-terminal end sequences, and they clustered into different subgroups. The B-hordeins with identical C-terminal end sequences were clustered into a same subgroup, so we believe that B-hordein gene subfamilies possibly can be classified on the basis of the conserved C-terminal end sequences of predicted polypeptide. Phylogenetic analysis also indicated that there is a relatively weak identity between our predicted B-hordeins and those reported from H. chilense and H. brevisubulatum. All of our nine predicted B-hordeins were clustered together and other B-hordeins formed another cluster. The possible use of these genes in relation to the barley quality is discussed.
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Yu MQ, Chen JM. [Determination of syringin and rutin in 11 species of Saussurea by high performance liquid chromatography]. Se Pu 2001; 19:243-4. [PMID: 12541807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023] Open
Abstract
Zorbax ODS column and gradient elution of acetonitrile-acetic acid solution as mobile phase were employed to determine the content of syringin and rutin in 11 species of Saussurea by RP-HPLC. The detection wavelength was 260 nm. The results showed that standard curves of syringin and rutin were linear in the range of 0.0525 microgram-1.05 micrograms and 0.0658 microgram-1.32 micrograms, respectively. The correlation coefficients were 0.9988 and 0.9999. The method provides new indices for quality control of Saussurea.
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Affiliation(s)
- M Q Yu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100094, China
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Li KM, Yang XJ, Yu MQ, Xie C, Xu LZ. [Determination of loganin in Cornus officinalis Sieb. et Zucc. by TLC scanner]. Zhongguo Zhong Yao Za Zhi 1994; 19:738, 763. [PMID: 7718136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The content of loganin extracted from Cornus of ficinalis was determined directly on a CS-930 TLC scanner. The method is simple and sensitive, and can serve as an index for checking the quality of C. of ficinalis.
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Affiliation(s)
- K M Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing
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Yu MQ, Person-Dedryver F, Jahier J, Pannetier D, Tanguy AM, Abelard P. Resistance to root knot nematode, Meloidogyne naasi (Franklin) transferred from Aegilops variabilis Eig to bread wheat. ACTA ACUST UNITED AC 1990. [DOI: 10.1051/agro:19900603] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Yu MQ, Liu ZL, Hu YQ, Wu XR. Ultrastructural observation on influence of gossypol on the hormone-secreting cells of pituitary-testis axis of rats. J Tongji Med Univ 1988; 8:229-31. [PMID: 3249351 DOI: 10.1007/bf02887896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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