新型转基因水稻既高产又环保来自中国、美国和瑞典的联合课题组，首次成功研发出了第一种转基因水稻，可以同时减少甲烷释放量和提高稻谷颗粒淀粉含量。其中的关键基因是大麦中的糖信号分子（sugar signalling in barley2，SUSIBA2）。S...新型转基因水稻既高产又环保来自中国、美国和瑞典的联合课题组，首次成功研发出了第一种转基因水稻，可以同时减少甲烷释放量和提高稻谷颗粒淀粉含量。其中的关键基因是大麦中的糖信号分子（sugar signalling in barley2，SUSIBA2）。SUSIBA2是一种只存在于植物的转录因子，参与调节糖分子诱导的基因表达，因而可能参与了能量分子从合成到固定下来的信号通路。过量表达SUSIBA2可以导致植物更高的淀粉合成水平和沉积量，并且减少甲烷的释放量。因此，SUSIBA2转基因水稻的安全性验证如果能够通过的话，那么对于人类的可持续发展将具有重要意义。展开更多
Methane oxidation by paddy soils in a closed system could be simulsted by the equation where xo and x are the CH4 concentrations at time zero and t, respectively; k1 and k2 are constants related to the constant of fir...Methane oxidation by paddy soils in a closed system could be simulsted by the equation where xo and x are the CH4 concentrations at time zero and t, respectively; k1 and k2 are constants related to the constant of first-order-kinetics. According to the equation the change of soil ability to oxidize CH4 could be estimated by the equstion The results showed that the soil ability to oxidize CH4 varied, depending on the initial CH4 concentration.High initial CH4 concentration stimulated soil ability to consume CH4, while low concentration depressed the ability. This characteristic of paddy soil seemed to be of considerable significance to self-adjusting CH4 emission from flooded rice fields if there exist oxic microsites in the soil.展开更多
文摘新型转基因水稻既高产又环保来自中国、美国和瑞典的联合课题组，首次成功研发出了第一种转基因水稻，可以同时减少甲烷释放量和提高稻谷颗粒淀粉含量。其中的关键基因是大麦中的糖信号分子（sugar signalling in barley2，SUSIBA2）。SUSIBA2是一种只存在于植物的转录因子，参与调节糖分子诱导的基因表达，因而可能参与了能量分子从合成到固定下来的信号通路。过量表达SUSIBA2可以导致植物更高的淀粉合成水平和沉积量，并且减少甲烷的释放量。因此，SUSIBA2转基因水稻的安全性验证如果能够通过的话，那么对于人类的可持续发展将具有重要意义。
文摘Methane oxidation by paddy soils in a closed system could be simulsted by the equation where xo and x are the CH4 concentrations at time zero and t, respectively; k1 and k2 are constants related to the constant of first-order-kinetics. According to the equation the change of soil ability to oxidize CH4 could be estimated by the equstion The results showed that the soil ability to oxidize CH4 varied, depending on the initial CH4 concentration.High initial CH4 concentration stimulated soil ability to consume CH4, while low concentration depressed the ability. This characteristic of paddy soil seemed to be of considerable significance to self-adjusting CH4 emission from flooded rice fields if there exist oxic microsites in the soil.
