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Molecular Plant 2014年第11期7卷 1653-1669页

作者： Lin-Hui Yu Zi-Qing Miao guo-feng Qi jie Wu Xiao-Teng Cai jie-Li Mao Cheng-Bin Xiang School of Life Sciences University of Science and Technology of China Hefei Anhui Province 230027 China

Plant root system morphology is dramatically influenced by various environmental cues. The adaptation of root system architecture to environmental constraints, which mostly depends on the formation and growth of lateral roots, is an important agronomic trait. Lateral root development is regulated by the external signals coordinating closely with intrinsic signaling pathways. MADS-box transcription factors are known key regulators of the transition to flowering and flower development. However, their functions in root development are still poorly understood. Here we report that AGL21, an AGL17-clade MADS-box gene, plays a crucial role in lateral root development. AGL21 was highly expressed in root, particularly in the root central cylinder and lateral root primordia. AGL21 overexpression plants produced more and longer lateral roots while ag121 mutants showed impaired lateral root development, especially under nitrogen-deficient conditions. AGL21 was induced by many plant hormones and environmental stresses, suggesting a function of this gene in root system plasticity in response to various signals. Furthermore, AGL21 was found positively regulating auxin accumulation in lateral root primordia and lateral roots by enhancing local auxin biosynthesis, thus stimulating lateral root initiation and growth. We propose that AGL21 may be involved in various environmental and physiological signals-mediated lateral root development and growth.

关键词： MADS root system architecture lateral root AGL21 auxin nitrate sulfate.

An Analysis of the Fragmentation of Observing Time At the Muztagh-Ata Site

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Research in Astronomy and Astrophysics 2024年第3期24卷 29-33页

作者： Wen-Bo Gu Jing Xu guo-jie feng Xuan Zhang Le-Tian Wang Xin-Liang Wang Ali Esamdin Li-Xian Shen Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 83001lChina School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

Cloud cover plays a pivotal role in assessing observational conditions for astronomical *** for the fraction of observing time,its fragmentation also wields a significant influence on the quality of nighttime sky *** this article,we introduce the functionΓ∈[0,1],designed to comprehensively capture both the fraction of available observing time and its *** in situ measurement data gathered at the Muztagh-Ata site between 2017 and 2021,we showcase the effectiveness of our *** statistical result illustrates that the Muztagh-Ata site affords approximately 122 nights that were absolutely clear and 205 very good nights annually,corresponding toΓ≥0.9 andΓ≥0.36 respectively.

关键词： site testing-atmospheric effects-methods statistical

Pulsations of the High-Amplitude δ Scuti star YZ Bootis

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Research in Astronomy and Astrophysics 2018年第1期18卷 11-20页

作者： Tao-Zhi Yang Ali Esamdin Jian-Ning Fu Hu-Biao Niu guo-jie feng Fang-Fang Song Jin-Zhong Liu Lu Ma Xinjiang Astronomical Observatory Chinese Academy of Sciences Urumqi 830011 China University of Chinese Academy of Sciences Beijing 100049 China Department of Astronomy Beijing Normal University Beijing 100875 China

We present a study on pulsations of the high-amplitudeδScuti star YZ Boo based on photometric observations in Johnson V and R bands with both the Nanshan 1-m telescope of Xinjiang Astronomical Observatory（XAO）and the Xinglong 85-cm telescope of National Astronomical Observatories,Chinese Academy of Sciences（NAOC）.Fourier analysis of the light curves reveals the fundamental radial mode and its five harmonics,with the fourth and fifth being newly *** new times of maximum light are determined from the light curves,and combined with those in the literature,we construct the O-C diagram,derive a new ephemeris and determine a new value for the updated period of 0.104091579（2）.In addition,the O-C diagram reveals an increasing rate of period change for YZ *** models are calculated and constrained with the observationally determined parameters of YZ *** mass and age of YZ Boo are hence derived as M=1.61±0.05 M_⊙ and age=（1.44±0.14）×10~9 yr,*** both the frequency of the fundamental radial mode and the rate of period change,YZ Boo is located at the post main sequence stage.

关键词： stars:variables:δ Scuti star stars:individual(YZ Boo) stars:oscillations

The wide-field photometric system of the Nanshan One-meter Telescope

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Research in Astronomy and Astrophysics 2020年第12期20卷 373-382页

作者： Chun-Hai Bai guo-jie feng Xuan Zhang Hu-Biao Niu Abdusamatjan Eskandar Guang-Xin Pu Shu-guo Ma Jin-Zhong Liu Xiao-Jun Jiang Lu Ma Ali Esamdin Na Wang Xinjiang Astronomical Observatories Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

The Nanshan One-meter Wide-field Telescope is a prime focus system that is located at Nanshan Station of Xinjiang Astronomical *** field of view was designed to 1.5°× 1.5°,and the Johnson-Cousins UBVRI system was chosen as the main filter *** telescope has been providing observation services for astronomers since September *** source searching and time-domain surveys are the main scientific *** system’s test results are reported including linearity,dark current,bias,readout noise and gain of the CCD *** accurate instrumental calibration coefficients in UBVRI bands were driven with Landolt standard stars during photometric ***,the limiting magnitudes are given with signal-to-noise ratios and various exposure times for observers.

关键词： telescope filter CCD photometry

KIC 10417986:Spectroscopic Confirmation of the Nature of the Binary System with aδScuti Component

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Research in Astronomy and Astrophysics 2022年第10期22卷 49-60页

作者： guo-jie feng Ali Esamdin Jian-Ning Fu Hu-Biao Niu Peng Zong Tao-Zhi Yang Shu-guo Ma Jing Xu Chun-Hai Bai Yong Wang Wei-Chao Sun Xin-Liang Wang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumgiXinjang 830011China University of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi'an Jiaotong University710049 Xi'anChina

KIC 10417986 is a short orbital period(0.0737 day)ellipsoidal variable star with aδSct andγDor hybrid pulsation component discovered by *** ground-based spectroscopic observations were carried out in the winters of 2020 and 2021 to investigate the binary nature of this *** derive the orbital parameters using the rvfit code with a result of K_(1)=29.7±1.5 km s^(-1),γ=-18.7±1.7 km s^(-1),and confirm an orbital period of 0.84495 day instead of the result given by *** atmospheric parameters of the primary are determined by the synthetic spectral fitting technique with the estimated values of T_(eff)=7411±187 K,log g=4.2±0.3 dex,[M/H]=0.08±0.09 dex and vsini=52±11 km s^(-1).KIC 10417986 is a circular orbit binary *** the single-lined nature and mass function of the star,the derived orbital inclination is 26°±6°,and the mass of the secondary is 0.52_(-0.09)^(+0.18)M_(⊙),which should be a late-K to early-M type *** frequencies are extracted from Kepler light curves,of which six independent frequencies in the high-frequency region are identified as the p-mode pulsations ofδSct star,and one independent frequency in the low-frequency region(f_(2)=1.3033 cd^(-1))is probably the rotational frequency due to the starspots rather than the ellipsoidal effect.

关键词： techniques spectroscopic-(stars:)binaries spectroscopic-stars individual(KIC 10417986)-stars oscillations(including pulsations)-stars variables delta Scuti-(stars:)starspots

Expression and functional characterization of platelet-derived growth factor receptor-like gene

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World Journal of Gastroenterology 2010年第12期16卷 1465-1472页

作者： guo, feng-jie Zhang, Wei-Jia Li, Ya-Lin Liu, Yan Li, Yue-Hui Huang, Jian Wang, Jia-Jia Xie, Ping-Li Li, Guan-Cheng Cent S Univ Xiangya Sch Med Canc Res Inst Changsha 410078 Hunan Peoples R China

AIM:To investigate the role of platelet-derived growth factor receptor-like gene(PDGFRL)in the anti-cancer therapy for colorectal cancers(CRC).METHODS:PDGFRL mRNA and protein levels were measured by reverse transcription-polymerase chain reaction(RT-PCR)and immunohistochemistry in CRC and colorectal normal *** prokaryotic expression vector was carried out in Escherichia coli(***),and purified by immobilized metal affinity *** effect of PDGFRL protein on CRC HCT-116 cells was detected by 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide(MTT),clone counting,cell cycle,and wound healing ***:Both RT-PCR and immunohistochemistry showed that the expression of PDGFRL in colorectal normal tissues was higher than in cancer *** pET22b-PDGFRL prokaryotic expression vector was successfully expressed in ***,and the target protein was expressed in the form of inclusion *** purification and refolding,recombinant human PDGFRL(rhPDGFRL)could efficiently inhibit the proliferation and invasion of CRC HCT-116 cells detected by MTT,clone counting and wound healing ***,rhPDGFRL arrested HCT-116 cell cycling at the G0/G1 ***:PDGFRL is a potential gene for application in the anti-cancer therapy for CRC.

关键词： Platelet-derived growth factor receptorlike Colorectal cancer Prokaryotic expression Reverse transcription-polymerase chain reaction Immunohistochemistry

Site-testing at Muztagh-ata site Ⅲ:temperature inversion in surface-layer atmosphere

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Research in Astronomy and Astrophysics 2020年第6期20卷 185-192页

作者： Jing Xu Ali Esamdin guo-jie feng Guang-Xin Pu Yi Hu Ke-Liang Hu Xu Yang Jin-Xin Hao Yan-jie Xue Xu Zhou Shu-guo Ma Abudusaimaitijiang Yisikandee Le-Tian Wang Xuan Zhang Chun-Hai Bai Peng Wei Liang Ming Lu Ma Jin-Zhong Liu Yun-Ying Jiang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

In this article,we present detailed seasonal,monthly and daily statistics of temperature difference in the surface layer at the Muztagh-ata site based on the temperature measurements at two heights of 2 m and6 *** find that temperature inversion occurs frequently at our site during nighttime,especially during the cold *** temperature inversion always represents stable atmospheric turbulence,which is crucial for an optical *** analyzing the behavior of temperature inversion and its correlation with wind and cloud amount,one conclusion can be made that radiation inversion is the main reason for the existence of temperature inversion in the surface-layer at the Muztagh-ata site.

关键词： site testing atmospheric turbulence temperature inversion

Site-testing at the Muztagh-ata Site *** Cloud Amount during the Last Five Years

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Research in Astronomy and Astrophysics 2023年第4期23卷 164-171页

作者： Jing Xu guo-jie feng Guang-xin Pu Le-tian Wang Zi-Huang Cao Li-Qing Ren Xuan Zhang Shu-guo Ma Chun-hai Bai Ali Esamdin Jian Li Yuan Tian Zheng Wang Yong-heng Zhao Jian-rong Shi Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Urumqi Meteorological Satellite Ground Station Urumqi 830011China

The clarity of nights is the major factor that should be carefully considered for optical/infrared astronomical observatories in site-testing *** coverage is directly related to the amount of time available for scientific observations at *** this article,we report on the results of detailed night-time cloud statistics and continuous observing time derived from ground-based all-sky cameras(ASCs)at the Muztagh-ata site from 2017to *** obtained from acquisition data show that the proportion of the annual observing time at the Muztagh-ata site is 65%,and the best period with the least cloud coverage and longer continuous observing time is from September to *** made a comparison of the monthly mean observing nights obtained from our ASC and CLARA data set,and results show that the discrepancy between them may depend on the cloud top *** average,this site can provide 175 clear nights and 169 nights with at least 4 hr of continuous observing time per year.

关键词： site testing-atmospheric effects-methods statistical

Site-testing at Muztagh-ata site Ⅰ:ground meteorology and sky brightness

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Research in Astronomy and Astrophysics 2020年第6期20卷 162-174页

作者： Jing Xu Ali Esamdin Jin-Xin Hao Jin-Min Bai Ji Yang Xu Zhou Yong-Qiang Yao Jin-Liang Hou Guang-Xin Pu guo-jie feng Chun-Hai Bai Peng Wei Shu-guo Ma Abudusaimaitijiang Yisikandee Le-Tian Wang Xuan Zhang Liang Ming Lu Ma Jin-Zhong Liu Zi-Huang Cao Yong-Heng Zhao Lu feng Jian-Rong Shi Hua-Lin Chen Chong Pei Xiao-Jun Jiang Jian-feng Wang Jian-feng Tian Yan-jie Xue Jing-Yao Hu Yun-Ying Jiang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Yunnan Observatories Chinese Academy of SciencesKunming 650000China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008 China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210008China

Site-testing is crucial for achieving the goal of scientific research and analysis of meteorological and optical observing conditions,one of the associated basic *** one of three potential sites to host the 12-meter Large Optical/infrared Telescope(LOT),the Muztagh-ata site,which is located on the Pamir Plateau in Xinjiang,in west China,began its site-testing task in the spring of *** this paper,we firstly start with an introduction to the site and then present a statistical analysis of the ground-level meteorological properties such as air temperature,barometric pressure,relative humidity,and wind speed and direction,recorded by an automatic weather station with standard meteorological sensors for a two-year *** also show the monitoring results of sky brightness during this period.

关键词： site testing meteorological condition optical observing

Site testing at Muztagh-ata site Ⅱ:seeing statistics

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Research in Astronomy and Astrophysics 2020年第6期20卷 175-184页

作者： Jing Xu Ali Esamdin Jin-Xin Hao Jin-Min Bai Ji Yang Xu Zhou Yong-Qiang Yao Jin-Liang Hou Guang-Xin Pu guo-jie feng Chun-Hai Bai Peng Wei Shu-guo Ma Abudusaimaitijiang Yisikandee Le-Tian Wang Xuan Zhang Liang Ming Lu Ma Jin-Zhong Liu Zi-Huang Cao Yong-Heng Zhao Lu feng Jian-Rong Shi Hua-Lin Chen Chong Pei Xiao-Jun Jiang Jian-feng Wang Jian-feng Tian Yan-jie Xue Jing-Yao Hu Yun-Ying Jiang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Yun nan Observatories Chin ese Academy of Scie ncesKun ming 650000China Purple Mountain Observatory Chinese Academy of SciencesNanjing 21000&China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210008China

In this article,we present a detailed analysis of the statistical properties of seeing for the Muztaghata site which is a candidate site for hosting the future Chinese Large Optical/infrared Telescope(LOT)*** measurements were obtained with differential image motion monitors(DIMMs)from April2017 to November 2018 at different heights during different *** median seeings at 11 m and6 m are very close but significantly different from that on the *** mainly analyzed the seeing at11 m monthly and hourly,having found that the best season for observing was from late autumn to early winter and seeing tended to improve during the night only in *** analysis of the dependence on temperature inversion,wind speed and direction also was made and the best meteorological conditions for seeing are given.

关键词： site testing seeing