Metabolism of polyamines in NaCl-resistant cell lines from Nicotiana sylvestris |
| |
Authors: | N I Shevyakova B P Strogonov I G Kiryan |
| |
Institution: | (1) Timiriazev Institute of Plant Physiology USSR Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, USSR |
| |
Abstract: | The polyamine titers in three cell lines of Nicotiana sylvestris were compared: Type 1, rapidly adapting to NaCl; Type 2, constantly resistant to NaCl; Type 3, a saltsensitive wild strain. During short-term cultivation in MS medium in the presence of 170 mM NaCl (1 passage, 14 d) the changes in polyamine titer in cell suspensions of type 1 (in a slightly adapted state) and non-adapted wild strain (type 3) showed a considerable increase in spermidine and spermine and a decrease in putrescine. After prolonged adaptation to NaCl (20 passages) the putrescine content in the cells of type 1 and of type 2 was increased at the expense of the polyamines. This suggests that the pattern of polyamine titer varies under short- and long-term adaptation to NaCl. The inverse ratio between growth processes and changes in polyamine and proline level indicates that polyamines fulfil primarily a protective and osmorepulatory function in plant cells under NaCl stress. |
| |
Keywords: | Salt-resistant cell lines polyamines proline growth |
本文献已被 SpringerLink 等数据库收录! |