A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this study.The stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffractio...A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this study.The stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction analysis.Notably,in the solid state,the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host−guest interaction.Through UV−vis absorption spectroscopy,electrochemical measurements,and theoretical calculations,valuable insights into the electronic properties of these rings were obtained.In addition,the single crystal of macrocycle A_(2)B demonstrates a second-order nonlinear optical response.As a class of organometallic nanorings,this work holds great potential for further exploration in the fields of organometallic chemistry,molecular electronics,and host−guest chemistry.展开更多
水稻黄绿叶突变会显著影响水稻产量和稻米品质.研究黄绿叶突变体叶绿素变化机理对选育高光效品种,促进水稻增产具有重要意义.本研究以甲基磺酸乙酯(ethylmethylsulfone,EMS)诱变处理粳稻云引(YY)后发现的一个黄绿叶突变体w08(YGL)为材料...水稻黄绿叶突变会显著影响水稻产量和稻米品质.研究黄绿叶突变体叶绿素变化机理对选育高光效品种,促进水稻增产具有重要意义.本研究以甲基磺酸乙酯(ethylmethylsulfone,EMS)诱变处理粳稻云引(YY)后发现的一个黄绿叶突变体w08(YGL)为材料,研究叶色突变对主要农艺性状、叶绿素含量、光合参数变化、水稻生理及亚显微结构的影响,并对该突变性状进行遗传分析、基因定位和功能验证.研究表明,突变体全生育期均表现为黄绿色.与野生型云引(YY)相比,突变体w08单株有效穗、结实率、千粒重分别降低46.7%、50.1%和18.3%,叶绿素a、叶绿素b和类胡萝卜素含量分别下降41.2%、98.7%、17.5%.光合速率检测结果表明,突变体净光合速率(Pn)显著降低,而细胞间CO_(2)(Ci)显著增加.对叶片叶绿体进行超微结构电子显微镜观察,结果发现,叶绿体内的类囊体基粒片层数目在突变体中明显减少.遗传分析结果表明,突变体黄绿叶性状为单基因遗传,受一对隐性核基因控制.利用突变体与雷蒙特(Lemont)杂交构建F2遗传群体,将该基因定位在10号染色体长臂GL8和T258两个标记之间,物理距离为60.2 kb,该区间包含14个候选基因.基因测序发现,该区间内的编码叶绿素酸酯氧化酶1(chlorophyllide a oxygenase1)蛋白的候选基因OsCAO1编码区CDS序列第957位碱基发生突变,形成一个终止密码子,使蛋白翻译提前终止.通过构建过表达和敲除载体进行转基因功能验证,进一步证实了OsCAO1基因功能.分析突变体中的激素含量和分蘖调控相关基因的表达,结果表明,突变体中水稻分蘖相关基因表达水平明显下降,生长素合成基因表达水平显著提高,水稻分蘖芽的生长素含量显著提高,从而证实OsCAO1基因突变抑制了水稻分蘖生长,使单株有效穗显著减少.展开更多
基金supported from National Natural Science Foundation of China(No.22071025)the Natural Science Fund of Fujian Province,China(No.2022J011152).
文摘A class of side-chain type ferrocene macrocycles with a radially conjugated system is introduced in this study.The stereo configurations of these ferrocene rings were determined through single-crystal X-ray diffraction analysis.Notably,in the solid state,the ferrocene rings exhibit a distinctive herringbone stacking pattern imposed by a ferrocene-to-ring host−guest interaction.Through UV−vis absorption spectroscopy,electrochemical measurements,and theoretical calculations,valuable insights into the electronic properties of these rings were obtained.In addition,the single crystal of macrocycle A_(2)B demonstrates a second-order nonlinear optical response.As a class of organometallic nanorings,this work holds great potential for further exploration in the fields of organometallic chemistry,molecular electronics,and host−guest chemistry.
文摘水稻黄绿叶突变会显著影响水稻产量和稻米品质.研究黄绿叶突变体叶绿素变化机理对选育高光效品种,促进水稻增产具有重要意义.本研究以甲基磺酸乙酯(ethylmethylsulfone,EMS)诱变处理粳稻云引(YY)后发现的一个黄绿叶突变体w08(YGL)为材料,研究叶色突变对主要农艺性状、叶绿素含量、光合参数变化、水稻生理及亚显微结构的影响,并对该突变性状进行遗传分析、基因定位和功能验证.研究表明,突变体全生育期均表现为黄绿色.与野生型云引(YY)相比,突变体w08单株有效穗、结实率、千粒重分别降低46.7%、50.1%和18.3%,叶绿素a、叶绿素b和类胡萝卜素含量分别下降41.2%、98.7%、17.5%.光合速率检测结果表明,突变体净光合速率(Pn)显著降低,而细胞间CO_(2)(Ci)显著增加.对叶片叶绿体进行超微结构电子显微镜观察,结果发现,叶绿体内的类囊体基粒片层数目在突变体中明显减少.遗传分析结果表明,突变体黄绿叶性状为单基因遗传,受一对隐性核基因控制.利用突变体与雷蒙特(Lemont)杂交构建F2遗传群体,将该基因定位在10号染色体长臂GL8和T258两个标记之间,物理距离为60.2 kb,该区间包含14个候选基因.基因测序发现,该区间内的编码叶绿素酸酯氧化酶1(chlorophyllide a oxygenase1)蛋白的候选基因OsCAO1编码区CDS序列第957位碱基发生突变,形成一个终止密码子,使蛋白翻译提前终止.通过构建过表达和敲除载体进行转基因功能验证,进一步证实了OsCAO1基因功能.分析突变体中的激素含量和分蘖调控相关基因的表达,结果表明,突变体中水稻分蘖相关基因表达水平明显下降,生长素合成基因表达水平显著提高,水稻分蘖芽的生长素含量显著提高,从而证实OsCAO1基因突变抑制了水稻分蘖生长,使单株有效穗显著减少.
