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植物干细胞中WUS/CLV反馈调控机制的研究进展 被引量:7
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作者 王占军 陈金慧 施季森 《林业科学》 EI CAS CSCD 北大核心 2011年第4期159-165,共7页
回顾植物顶端、根端和侧生分生组织的模式结构,以及干细胞区的WUSCHEL/CLAVATA(WUS/CLV)反馈调控机制研究进展发现,3种分生组织不仅都具有长期潜在的维持原始细胞启动状态的功能,而且可能都存在调控相邻干细胞分裂、分化的干细胞区。茎... 回顾植物顶端、根端和侧生分生组织的模式结构,以及干细胞区的WUSCHEL/CLAVATA(WUS/CLV)反馈调控机制研究进展发现,3种分生组织不仅都具有长期潜在的维持原始细胞启动状态的功能,而且可能都存在调控相邻干细胞分裂、分化的干细胞区。茎端分生组织中和根端分生组织中分别存在WUS/CLV和WOX5/CLE40反馈调控机制,2种反馈调控机制都具有维持干细胞区的分裂及其与其他组织形成之间的动态平衡功能。而有关植物尤其是木本植物的维管形成层组织中WUS/CLV反馈调控机制的报道不多,文中就这方面的研究进行综述和展望。 展开更多
关键词 植物干细胞 茎端分生组织 根端分生组织 维管形成层分生组织 WUS基因 CLV基因 反馈调控机制
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小白鼠心肌核DNA片段中的基因表达的分子开关的研究 被引量:6
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作者 袁明秀 侯仲刚 +2 位作者 陈志俊 张志宏 邓爱平 《高技术通讯》 EI CAS CSCD 2001年第1期7-13,共7页
原位染色发现 ,LDH( 1- 5) …nNAD+(LDH :乳酸脱氢酶 ,NAD+:氢化型辅酶I)可以进入核孔 ,可能与自己编码基因特异结合。体外表达实验中 ,稀释心肌DNA片段 ,促进LDH/DNA 表达LDH( 1- 5) ,LDH( 1- 5) 表达量与LDH/DNA 中可解离的LDH( 1- 5)... 原位染色发现 ,LDH( 1- 5) …nNAD+(LDH :乳酸脱氢酶 ,NAD+:氢化型辅酶I)可以进入核孔 ,可能与自己编码基因特异结合。体外表达实验中 ,稀释心肌DNA片段 ,促进LDH/DNA 表达LDH( 1- 5) ,LDH( 1- 5) 表达量与LDH/DNA 中可解离的LDH( 1- 5) 量呈正相关性。同位素14 C标记Leu法测定加入LDH( 1- 5) …nNAD+可以抑制LDH/DNA 体外表达 ,LDH( 1- 5) 表达抑制量与加入LDH( 1- 5) …nNAD+量呈正相关性。AFM直接观察到活性基因两头的调控序列可能结合自己编码的蛋白等活性因子。基因表达与调控的分子开关主要是自己编码的蛋白等活性因子。 展开更多
关键词 基因表达 分子开关 正负反馈调控机制 AFM 心肌 核DNA片断
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Research Progress on Ecological Risk Assessment based on M ultifunctional Landscape 被引量:2
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作者 LIN Dayi LIU Fangyu +2 位作者 ZHANG Jiping HAO Haiguang ZHANG Qiang 《Journal of Resources and Ecology》 CSCD 2021年第2期260-267,共8页
The unreasonable utilization and trade-offs of the multifunctional landscape is one of the important causes leading to ecological risk.Quantifying the relationship,heterogeneous process and driving mechanism between l... The unreasonable utilization and trade-offs of the multifunctional landscape is one of the important causes leading to ecological risk.Quantifying the relationship,heterogeneous process and driving mechanism between landscape function and human well-being can provide a scientific basis for achieving a win-win situation of regional development and ecological protection,and it is also an important issue for relevant scientific research.In this paper,we reviewed the current state of knowledge regarding landscape function and ecological risk,identified the feedback mechanisms among landscape change,landscape function,human well-being and ecological risk,constructed the ecological risk assessment framework based on landscape functions,and sorted out the key scientific issues and research trends.The interconnections between the multifunctional landscape,human well-being,and ecological risk comprise an important scientific issue in ecological risk assessment.However,there is a lack of understanding of the spatial-temporal characteristics of landscape function trade-offs,and there is also a lack of systematic and standardized methods for the identification and comprehensive evaluation of landscape functions.Exploring ecological risk management and the methodologies that integrate the two processes of nature and humanity is an inevitable trend for future research.Coupling landscape structure,function and process into ecological risk assessment,as well as focusing on the combination of human well-being,landscape function trade-off and ecological risk control policy design are important issues to be studied. 展开更多
关键词 landscape function ecological risk human well-being feedback mechanism management regulation
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