The retail industry is now going through shuffle, and also after the restructuring and expansion of the Chinese market, it will be occupied by more than a dozen Chinese retail enterprises and several foreign retail en...The retail industry is now going through shuffle, and also after the restructuring and expansion of the Chinese market, it will be occupied by more than a dozen Chinese retail enterprises and several foreign retail enterprises. After China entered the WTO, foreign retail line speeds up development in China, local retailers also resist foreign retail enterprises while accelerating their own development. Regional retail market continues to be a national leader and global retail business retail swallowed, although regional retail enterprises mastermind have regional customer emotional support and government protection, but eventually those who have the ability survive, the market economy is the constant for metabolism and eliminating the weak.展开更多
A growth experiment on agar medium and a hydroponics experiment were carried out to study the nitrogen （N） metabolism of a low-N tolerant mutant （lntl） of Arabidopsis thaliana under different N levels as compared ...A growth experiment on agar medium and a hydroponics experiment were carried out to study the nitrogen （N） metabolism of a low-N tolerant mutant （lntl） of Arabidopsis thaliana under different N levels as compared with the wild- type （WT） Arabidopsis. On the agar medium, no apparent growth differences were observed between the lntl and WT plants under a normal N level of 9 mmol L^-1 NO3. However, under a low N level of 0.18 mmol L^-1 NO3^-, the growth of the WT plants was greatly retarded, while the lntl plants were not affected by low-N stress and showed similar growth with those grown under a normal N level. In the hydroponics experiment, the lntl mutant had higher activities of glutamine synthetase （GS） and NADH-dependent glutamate synthase （NADH-GOGAT） in both leaves and roots under N-deficient conditions. Moreover, they accumulated less ammonium （NH4^＋） but more free amino acids in leaves compared with the WT plants. These observations suggest that better N assimilation might contribute to the low-N tolerant phenotype of the lnt1 mutant.展开更多
文摘The retail industry is now going through shuffle, and also after the restructuring and expansion of the Chinese market, it will be occupied by more than a dozen Chinese retail enterprises and several foreign retail enterprises. After China entered the WTO, foreign retail line speeds up development in China, local retailers also resist foreign retail enterprises while accelerating their own development. Regional retail market continues to be a national leader and global retail business retail swallowed, although regional retail enterprises mastermind have regional customer emotional support and government protection, but eventually those who have the ability survive, the market economy is the constant for metabolism and eliminating the weak.
基金Supported by the National Basic Research Program of China(No.2007CB109305)the National Natural Science Foundation of China(No.30370839)
文摘A growth experiment on agar medium and a hydroponics experiment were carried out to study the nitrogen （N） metabolism of a low-N tolerant mutant （lntl） of Arabidopsis thaliana under different N levels as compared with the wild- type （WT） Arabidopsis. On the agar medium, no apparent growth differences were observed between the lntl and WT plants under a normal N level of 9 mmol L^-1 NO3. However, under a low N level of 0.18 mmol L^-1 NO3^-, the growth of the WT plants was greatly retarded, while the lntl plants were not affected by low-N stress and showed similar growth with those grown under a normal N level. In the hydroponics experiment, the lntl mutant had higher activities of glutamine synthetase （GS） and NADH-dependent glutamate synthase （NADH-GOGAT） in both leaves and roots under N-deficient conditions. Moreover, they accumulated less ammonium （NH4^＋） but more free amino acids in leaves compared with the WT plants. These observations suggest that better N assimilation might contribute to the low-N tolerant phenotype of the lnt1 mutant.
