非生物胁迫是影响农作物生长的重要因素,常常导致作物减产。挖掘非生物胁迫应答基因,培育抗逆性增强的作物新品种具有重要的现实意义。OsPM1(水稻Plasma Membrane protein 1基因)编码一种ABA转运蛋白,在水稻中过表达能够提高水稻的耐旱...非生物胁迫是影响农作物生长的重要因素,常常导致作物减产。挖掘非生物胁迫应答基因,培育抗逆性增强的作物新品种具有重要的现实意义。OsPM1(水稻Plasma Membrane protein 1基因)编码一种ABA转运蛋白,在水稻中过表达能够提高水稻的耐旱性。在本研究中我们进一步发现,OsPM1还受渗透、高盐、高温胁迫的诱导,同时其转录受到水稻热休克转录因子(Hsfs)的激活。过表达OsPM1的转基因水稻除耐旱性增强外,还具有更强的抵御渗透、高盐及高温胁迫的能力。将OsPM1的胁迫诱导型启动子与高粱的热休克转录因子SbHsf03的编码区融合成为重组基因,转化到粳稻日本晴中,经耐热性检测,发现日本晴叶片的耐热性增强,但其正常生长没有受到影响。研究结果提示OsPM1基因及其启动子在提高水稻抗多种非生物胁迫能力上具有重要的应用价值。展开更多
An observational campaign was conducted in the street canyon of Zhujiang Road in Nanjing city in 2007. Hourly mean concentrations of PM10 were measured at street and roof levels. The Operational Street Pollution Model...An observational campaign was conducted in the street canyon of Zhujiang Road in Nanjing city in 2007. Hourly mean concentrations of PM10 were measured at street and roof levels. The Operational Street Pollution Model （OSPM） street canyon dispersion model was used to calculate the street concentrations and the results were compared with the measurements. The results show that there is good agreement between measured and predicted concentrations. The correlation coefficient R2 values （R2 is a measure of the correlation of the predicted and measured time series of concentrations） are 0.5319, 0.8044, and 0.6630 for the scatter plots of PM10 corresponding to light wind speed conditions, higher wind speed conditions, and all wind speed conditions, respectively. PM10 concentrations tend to be smaller for the higher wind speed cases and decrease rapidly with increasing wind speed. The presentations of measured and modelled concentration dependence on wind direction show fairly good agreement. PM10 concentrations measured on the windward side are relatively smaller, compared with the corresponding results for the leeward side. This study demonstrates that it is possible to use the OSPM to model PM10 dispersion rules for an urban street canyon.展开更多
文摘非生物胁迫是影响农作物生长的重要因素,常常导致作物减产。挖掘非生物胁迫应答基因,培育抗逆性增强的作物新品种具有重要的现实意义。OsPM1(水稻Plasma Membrane protein 1基因)编码一种ABA转运蛋白,在水稻中过表达能够提高水稻的耐旱性。在本研究中我们进一步发现,OsPM1还受渗透、高盐、高温胁迫的诱导,同时其转录受到水稻热休克转录因子(Hsfs)的激活。过表达OsPM1的转基因水稻除耐旱性增强外,还具有更强的抵御渗透、高盐及高温胁迫的能力。将OsPM1的胁迫诱导型启动子与高粱的热休克转录因子SbHsf03的编码区融合成为重组基因,转化到粳稻日本晴中,经耐热性检测,发现日本晴叶片的耐热性增强,但其正常生长没有受到影响。研究结果提示OsPM1基因及其启动子在提高水稻抗多种非生物胁迫能力上具有重要的应用价值。
基金supported by the Natural Science Foundation of Jiangsu Province(No.BK2004216)
文摘An observational campaign was conducted in the street canyon of Zhujiang Road in Nanjing city in 2007. Hourly mean concentrations of PM10 were measured at street and roof levels. The Operational Street Pollution Model （OSPM） street canyon dispersion model was used to calculate the street concentrations and the results were compared with the measurements. The results show that there is good agreement between measured and predicted concentrations. The correlation coefficient R2 values （R2 is a measure of the correlation of the predicted and measured time series of concentrations） are 0.5319, 0.8044, and 0.6630 for the scatter plots of PM10 corresponding to light wind speed conditions, higher wind speed conditions, and all wind speed conditions, respectively. PM10 concentrations tend to be smaller for the higher wind speed cases and decrease rapidly with increasing wind speed. The presentations of measured and modelled concentration dependence on wind direction show fairly good agreement. PM10 concentrations measured on the windward side are relatively smaller, compared with the corresponding results for the leeward side. This study demonstrates that it is possible to use the OSPM to model PM10 dispersion rules for an urban street canyon.
