Bamboo shoots grow quickly through the rapid elongation of intemodes. In order to veri~ whether DNA methylation affects bamboo shoot elongation, we compared DNA methylation levels at five develop- mental stages of bam...Bamboo shoots grow quickly through the rapid elongation of intemodes. In order to veri~ whether DNA methylation affects bamboo shoot elongation, we compared DNA methylation levels at five develop- mental stages of bamboo （Phyllostachys praecox）, including young bamboo shoot of 40-cm at length （S1）, bamboo shoot of 2-cm at length （S2）, young leaf （Y1）, leaf （Y2）, and aging leaf （M）, by using amplified fragment length polymorphism （AFLP） based on KpnI/MseI and Acc65I/MseI platforms. The polymorphism ratio of methylated to un- methylated DNA sites in bamboo shoot （$1 and $2） was higher than that in leaf （Y1, Y2 and M）. The polymorphism ratio of methylated to un- methylated DNA sites in $2 was highest （32%）. Our results suggest that DNA methylation changed greatly at bamboo growing stages, especially in stage of rapid elongation of intemodes.展开更多
BGP作为Internet域间路由的基本协议,其安全问题一直受到学界的关注,特别是安全性与实现难度之间的折中。针对传统解决方案S-BGP(secure BGP)的不足,在定义关键节点KN(key node)的基础上,利用KN对路由信息安全验证的特殊功能,提出了更...BGP作为Internet域间路由的基本协议,其安全问题一直受到学界的关注,特别是安全性与实现难度之间的折中。针对传统解决方案S-BGP(secure BGP)的不足,在定义关键节点KN(key node)的基础上,利用KN对路由信息安全验证的特殊功能,提出了更加轻量级的解决方案——基于关键节点的域间路由安全机制SR-KN(secure routing based on key node)。通过对比分析表明,SR-KN在保证BGP安全的前提下,减少了全网证书规模及存储量,且具有更好的收敛性能。展开更多
基金funded by the Natural Science Foundation of China (30800879)
文摘Bamboo shoots grow quickly through the rapid elongation of intemodes. In order to veri~ whether DNA methylation affects bamboo shoot elongation, we compared DNA methylation levels at five develop- mental stages of bamboo （Phyllostachys praecox）, including young bamboo shoot of 40-cm at length （S1）, bamboo shoot of 2-cm at length （S2）, young leaf （Y1）, leaf （Y2）, and aging leaf （M）, by using amplified fragment length polymorphism （AFLP） based on KpnI/MseI and Acc65I/MseI platforms. The polymorphism ratio of methylated to un- methylated DNA sites in bamboo shoot （$1 and $2） was higher than that in leaf （Y1, Y2 and M）. The polymorphism ratio of methylated to un- methylated DNA sites in $2 was highest （32%）. Our results suggest that DNA methylation changed greatly at bamboo growing stages, especially in stage of rapid elongation of intemodes.
文摘BGP作为Internet域间路由的基本协议,其安全问题一直受到学界的关注,特别是安全性与实现难度之间的折中。针对传统解决方案S-BGP(secure BGP)的不足,在定义关键节点KN(key node)的基础上,利用KN对路由信息安全验证的特殊功能,提出了更加轻量级的解决方案——基于关键节点的域间路由安全机制SR-KN(secure routing based on key node)。通过对比分析表明,SR-KN在保证BGP安全的前提下,减少了全网证书规模及存储量,且具有更好的收敛性能。
