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糜子SBP基因家族全基因组鉴定及表达分析
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作者 段政勇 丁敏 +4 位作者 王宇卓 丁艺冰 陈凌 王瑞云 乔治军 《植物学报》 CAS CSCD 北大核心 2024年第2期231-244,共14页
SBP(squamosapromoterbindingprotein)家族广泛参与植物生长发育、信号转导及多种生理生化过程。从糜子(Panicum miliaceum)全基因组中筛选并鉴定到25个SBP基因。系统发育分析表明,PmSBP家族成员分为6个亚家族。同一亚家族成员具有相似... SBP(squamosapromoterbindingprotein)家族广泛参与植物生长发育、信号转导及多种生理生化过程。从糜子(Panicum miliaceum)全基因组中筛选并鉴定到25个SBP基因。系统发育分析表明,PmSBP家族成员分为6个亚家族。同一亚家族成员具有相似的基因结构和保守基序。共线性分析表明,PmSBP与拟南芥(Arabidopsisthaliana)AtSBP和水稻(Oryzasativa)OsSBP分别形成7对和31对直系同源基因。顺式作用元件分析表明,PmSBP启动子区富含逆境胁迫、光反应及激素信号响应元件。基因表达模式分析表明,PmSBP基因表达具有明显的组织特异性、品种特异性及发育阶段特异性,表明SBP基因在糜子生长发育中发挥重要作用。研究结果为揭示SBP基因在糜子生长发育中的生物学功能奠定了基础,也为其它作物SBP基因研究提供了借鉴参考。 展开更多
关键词 糜子 SBP基因 全基因组鉴定 基因表达分析
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How the Internet Promotes China’s Exports:A Firm-level Perspective 被引量:4
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作者 Yifei Mu Zhen Chen +2 位作者 yibing ding Yuqing Wang Bo Pang 《China & World Economy》 SCIE 2020年第5期118-142,共25页
The development of information and communications technologyv(ICT),particularly the Internet,has reduced trade costs.However,it remains unclear whether these reduced costs are reflected in the “extensive margins”of ... The development of information and communications technologyv(ICT),particularly the Internet,has reduced trade costs.However,it remains unclear whether these reduced costs are reflected in the “extensive margins”of firms'exports(which refer to the probability of firms exporting)or the “intensive margins”(which refer to the value of firms'export).To test this,we used the concepts of information cost and binary margins,an augmented trade model of firm heterogeneity,a two-stage Heckman estimation,and data from the World Bank Enterprise Survey of Chinese firms in 2012.The results revealed that reduced trade costs from the use of ICT were positively related to extensive margins but that the connection with intensive margins was not significant.The results lead to the conclusion that reduced information costs related to a firm's exporting behavior were primarily reflcted in variable trade cosis.This study offers theoretical and empirical evidence for China 3 policies towards the Internet,which are relevant for the export of manufactured goods.The government should encourage the use of ICT to enhance firms export opporunities while facing current trade policy uncerainty. 展开更多
关键词 firm heterogeneity information cost Internet Plus margins of trade
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