【目的】甘蔗是重要的糖料作物,温度、盐碱、水分等因素是制约其生长发育的关键环境因素。类钙调磷酸酶B蛋白CBL(calcineurin B-like protein)是一类Ca^(2+)结合蛋白,通过与其特定的蛋白激酶CIPK(CBL-interacting protein kinase)作用,...【目的】甘蔗是重要的糖料作物,温度、盐碱、水分等因素是制约其生长发育的关键环境因素。类钙调磷酸酶B蛋白CBL(calcineurin B-like protein)是一类Ca^(2+)结合蛋白,通过与其特定的蛋白激酶CIPK(CBL-interacting protein kinase)作用,在Ca^(2+)信号传导通路,尤其是逆境信号传导通路中发挥重要作用。目前,甘蔗全基因组测序已完成,但其CBL-CIPK基因家族成员尚未确定,互作调控机理依然未知。本研究确定了甘蔗CBL、CIPK成员并揭示了CBL-CIPK互作关系,为研究甘蔗CBL-CIPK的互作机理提供基因资源和理论基础。【方法】以甘蔗品种‘GT58’为材料,通过RT-qPCR技术分析CBLs、CIPKs在低温、高温、NaHCO_(3)和PEG处理等4种非生物胁迫下的表达水平,利用酵母双杂交试验分析SsCBLs和SsCIPKs之间的相互作用。【结果】甘蔗全基因组中共有19个CBL基因和82个CIPK基因,分布在不同的进化分支且存在基因复制现象,基因家族成员之间理化性质差异较大,结构域与蛋白基序具有高度保守性,顺式作用元件分布多样;转录水平上,SsCBL7/SsCBL12/SsCIPK1/SsCIPK5的表达水平易受低温、高温、干旱和高盐等多种非生物胁迫的调控;蛋白水平上,SsCBL1与SsCIPK47和SsCIPK81相互作用,SsCBL8与SsCIPK47和SsCIPK81相互作用。【结论】CBL-CIPK互作网络可能在甘蔗生长发育过程中响应非生物胁迫,发挥重要作用。展开更多
The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the ...The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.展开更多
This paper analyzes the causes of the offshore strength enhancement of Typhoon Tiange (No. 1713) from four aspects: high and low layer divergence, vertical wind shear, southwest monsoon transport, offshore sea tempera...This paper analyzes the causes of the offshore strength enhancement of Typhoon Tiange (No. 1713) from four aspects: high and low layer divergence, vertical wind shear, southwest monsoon transport, offshore sea temperature and weak cold air. The conclusions are as follows: The high-level airflow divergence enhancement and positive vorticity advection in the offshore, strengthen the middle rise movement of the “Tiange”, and the ascending movement enhances the strength of the “Tiange” by strengthening the lower layer convergence;The high offshore sea temperature and sea temperature are changing temperature, which also has a certain effect on the strengthening of “Tiange” in the offshore;The strengthening of the southwest warm and humid airflow provides sufficient water vapor and energy for the development of “Tiange”, which is beneficial to the maintenance of the typhoon warm heart structure;The intrusion of weak cold air, enhanced the radiation cooperation of the lower typhoon disturbance, which is beneficial to the enhancement of “Tiange”.展开更多
According to clinical statistics,the mortality of patients with early brainstem hemorrhage is high.In this study,we established rat models of brainstem hemorrhage by injecting type Ⅶ collagenase into the right basote...According to clinical statistics,the mortality of patients with early brainstem hemorrhage is high.In this study,we established rat models of brainstem hemorrhage by injecting type Ⅶ collagenase into the right basotegmental pontine and investigated the pathological changes of early brainstem hemorrhage using multi-sequence magnetic resonance imaging and histopathological methods.We found that brainstem hematoma gradually formed in the injured rats over the first 3 days and then reduced after 7 days.The edema that occurred was mainly of the vasogenic type.No complete myelin sheath structure was found around the focus of the brainstem hemorrhage.The integrity and continuity of nerve fibers gradually deteriorated over the first 7 days.Neuronal degeneration was mild in the first 3 days and then obviously aggravated on the 7^(th)day.Inflammatory cytokines,interleukin-1β,and tumor necrosis factorαappeared on the 1st day after intracerebral hemorrhage,reached peak levels on the 3^(rd)day,and decreased from the 7^(th)day.Our findings show the characteristics of the progression of early brainstem hemorrhage.展开更多
In our published paper,国an important affiliation(University of Chinese Academy of Sciences,Beijing 100049,China)should be added as the 3rd affiliation for the first author,as given above.References[1]Huang C,ZhangJ,Y...In our published paper,国an important affiliation(University of Chinese Academy of Sciences,Beijing 100049,China)should be added as the 3rd affiliation for the first author,as given above.References[1]Huang C,ZhangJ,Ye F,Qin Z,Amir S M,Buck Z N,Salman A,Kreuzpaintner W,Qi X,Wang T,and Tong X 2021 Chin.Phys.Lett.38092801。展开更多
Myeloblastosis(MYB)类转录因子是高等植物中最大的转录因子家族之一,在植物发育及防御反应过程中发挥重要作用,还参与植物对干旱等非生物胁迫的响应。谷子(Setaria italica L.)起源于中国,具有抗旱、耐瘠薄的特性,是研究单子叶作物非...Myeloblastosis(MYB)类转录因子是高等植物中最大的转录因子家族之一,在植物发育及防御反应过程中发挥重要作用,还参与植物对干旱等非生物胁迫的响应。谷子(Setaria italica L.)起源于中国,具有抗旱、耐瘠薄的特性,是研究单子叶作物非生物胁迫抗性的理想材料。本研究对耐低氮胁迫谷子品种郑204经低氮处理后进行转录组分析,鉴定出一个在低氮胁迫条件下明显上调的MYB类转录因子SiMYB42。系统发育树结果表明,SiMYB42属于R2R3-MYB亚族,具有2个MYB保守域;表达模式分析显示,SiMYB42在低氮、高盐、干旱和ABA胁迫条件下表达量显著上调;亚细胞定位、quantitative real-time PCR及转录激活活性分析结果表明,SiMYB42蛋白定位于植物的细胞核和细胞膜中,主要在谷子的叶部或根部表达,具有转录激活活性;基因功能分析结果表明,在正常条件下,转SiMYB42基因拟南芥与野生型Columbia-0拟南芥(WT)无明显差异,但在低氮条件下,转SiMYB42基因拟南芥的主根长、根系表面积及鲜重均显著高于WT,结果证明SiMYB42基因可以提高转基因植物对低氮胁迫的耐性;下游基因表达分析结果显示,在转SiMYB42基因拟南芥中,参与植物氮素转运的硝酸盐转运基因NRT2.1、NRT2.4和NRT2.5的表达水平均高于WT,启动子分析结果显示NRT2.1、NRT2.4和NRT2.5基因启动子序列中均具有MYB结合位点。以上结果证明,SiMYB42可以通过调控下游硝酸盐转运体基因的表达提高植物在低氮条件下的耐性。本研究揭示了SiMYB42基因在低氮胁迫反应途径中的作用,为进一步了解谷子低氮胁迫响应的调控网络奠定了基础。展开更多
文摘【目的】甘蔗是重要的糖料作物,温度、盐碱、水分等因素是制约其生长发育的关键环境因素。类钙调磷酸酶B蛋白CBL(calcineurin B-like protein)是一类Ca^(2+)结合蛋白,通过与其特定的蛋白激酶CIPK(CBL-interacting protein kinase)作用,在Ca^(2+)信号传导通路,尤其是逆境信号传导通路中发挥重要作用。目前,甘蔗全基因组测序已完成,但其CBL-CIPK基因家族成员尚未确定,互作调控机理依然未知。本研究确定了甘蔗CBL、CIPK成员并揭示了CBL-CIPK互作关系,为研究甘蔗CBL-CIPK的互作机理提供基因资源和理论基础。【方法】以甘蔗品种‘GT58’为材料,通过RT-qPCR技术分析CBLs、CIPKs在低温、高温、NaHCO_(3)和PEG处理等4种非生物胁迫下的表达水平,利用酵母双杂交试验分析SsCBLs和SsCIPKs之间的相互作用。【结果】甘蔗全基因组中共有19个CBL基因和82个CIPK基因,分布在不同的进化分支且存在基因复制现象,基因家族成员之间理化性质差异较大,结构域与蛋白基序具有高度保守性,顺式作用元件分布多样;转录水平上,SsCBL7/SsCBL12/SsCIPK1/SsCIPK5的表达水平易受低温、高温、干旱和高盐等多种非生物胁迫的调控;蛋白水平上,SsCBL1与SsCIPK47和SsCIPK81相互作用,SsCBL8与SsCIPK47和SsCIPK81相互作用。【结论】CBL-CIPK互作网络可能在甘蔗生长发育过程中响应非生物胁迫,发挥重要作用。
基金This work was supported by the National Natural Science Foundation of China(No.12005239).
文摘The high-energy photon source(HEPS)is the first fourth-generation synchrotron light source facility in China.The HEPS injector consists of a linear accelerator(Linac)and a full energy booster.The booster captures the electron beam from the Linac and increases its energy to the value required for the storage ring.The full-energy beam could be injected to the storage ring directly or after“high-energy accumulation.”On November 17,2023,the key booster parameters successfully reached their corresponding target values.These milestone results were achieved based on numerous contributions,including nearly a decade of physical design,years of equipment development and installation,and months of beam commissioning.As measured at the extraction energy of 6 GeV,the averaged beam current and emittance reached 8.57 mA with 5 bunches and 30.37 nm rad with a single-bunch charge of 5.58 nC,compared with the corresponding target values of 6.6 mA and 35 nm rad,respectively.This paper presents the physical design,equipment development,installation,and commissioning process of the HEPS booster.
文摘This paper analyzes the causes of the offshore strength enhancement of Typhoon Tiange (No. 1713) from four aspects: high and low layer divergence, vertical wind shear, southwest monsoon transport, offshore sea temperature and weak cold air. The conclusions are as follows: The high-level airflow divergence enhancement and positive vorticity advection in the offshore, strengthen the middle rise movement of the “Tiange”, and the ascending movement enhances the strength of the “Tiange” by strengthening the lower layer convergence;The high offshore sea temperature and sea temperature are changing temperature, which also has a certain effect on the strengthening of “Tiange” in the offshore;The strengthening of the southwest warm and humid airflow provides sufficient water vapor and energy for the development of “Tiange”, which is beneficial to the maintenance of the typhoon warm heart structure;The intrusion of weak cold air, enhanced the radiation cooperation of the lower typhoon disturbance, which is beneficial to the enhancement of “Tiange”.
基金supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region, No. 2020D01A13 (to CWW)Chengdu Science and Technology Bureau, No. 2019-YF05-00511-SN (to MT)1.3.5 Project for Disciplines of Excellence, West China Hospital, Sichuan University, Nos. ZY2016102 (to MT), and ZY2016203 (to CY)
文摘According to clinical statistics,the mortality of patients with early brainstem hemorrhage is high.In this study,we established rat models of brainstem hemorrhage by injecting type Ⅶ collagenase into the right basotegmental pontine and investigated the pathological changes of early brainstem hemorrhage using multi-sequence magnetic resonance imaging and histopathological methods.We found that brainstem hematoma gradually formed in the injured rats over the first 3 days and then reduced after 7 days.The edema that occurred was mainly of the vasogenic type.No complete myelin sheath structure was found around the focus of the brainstem hemorrhage.The integrity and continuity of nerve fibers gradually deteriorated over the first 7 days.Neuronal degeneration was mild in the first 3 days and then obviously aggravated on the 7^(th)day.Inflammatory cytokines,interleukin-1β,and tumor necrosis factorαappeared on the 1st day after intracerebral hemorrhage,reached peak levels on the 3^(rd)day,and decreased from the 7^(th)day.Our findings show the characteristics of the progression of early brainstem hemorrhage.
文摘In our published paper,国an important affiliation(University of Chinese Academy of Sciences,Beijing 100049,China)should be added as the 3rd affiliation for the first author,as given above.References[1]Huang C,ZhangJ,Ye F,Qin Z,Amir S M,Buck Z N,Salman A,Kreuzpaintner W,Qi X,Wang T,and Tong X 2021 Chin.Phys.Lett.38092801。
文摘Myeloblastosis(MYB)类转录因子是高等植物中最大的转录因子家族之一,在植物发育及防御反应过程中发挥重要作用,还参与植物对干旱等非生物胁迫的响应。谷子(Setaria italica L.)起源于中国,具有抗旱、耐瘠薄的特性,是研究单子叶作物非生物胁迫抗性的理想材料。本研究对耐低氮胁迫谷子品种郑204经低氮处理后进行转录组分析,鉴定出一个在低氮胁迫条件下明显上调的MYB类转录因子SiMYB42。系统发育树结果表明,SiMYB42属于R2R3-MYB亚族,具有2个MYB保守域;表达模式分析显示,SiMYB42在低氮、高盐、干旱和ABA胁迫条件下表达量显著上调;亚细胞定位、quantitative real-time PCR及转录激活活性分析结果表明,SiMYB42蛋白定位于植物的细胞核和细胞膜中,主要在谷子的叶部或根部表达,具有转录激活活性;基因功能分析结果表明,在正常条件下,转SiMYB42基因拟南芥与野生型Columbia-0拟南芥(WT)无明显差异,但在低氮条件下,转SiMYB42基因拟南芥的主根长、根系表面积及鲜重均显著高于WT,结果证明SiMYB42基因可以提高转基因植物对低氮胁迫的耐性;下游基因表达分析结果显示,在转SiMYB42基因拟南芥中,参与植物氮素转运的硝酸盐转运基因NRT2.1、NRT2.4和NRT2.5的表达水平均高于WT,启动子分析结果显示NRT2.1、NRT2.4和NRT2.5基因启动子序列中均具有MYB结合位点。以上结果证明,SiMYB42可以通过调控下游硝酸盐转运体基因的表达提高植物在低氮条件下的耐性。本研究揭示了SiMYB42基因在低氮胁迫反应途径中的作用,为进一步了解谷子低氮胁迫响应的调控网络奠定了基础。
