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| Content Provider | Springer Nature Link |
|---|---|
| Author | Prudnikova, O. N. Rakitina, T. Ya. Karyagin, V. V. Vlasov, P. V. Rakitin, V. Yu. |
| Copyright Year | 2016 |
| Abstract | Components of the ethylene signal perception and transduction pathway (ethylene signaling pathway, ESP) were studied in respect to their involvement in regulation of UV-B-induced changes in levels of polyamines in plants Arabidopsis thaliana (L.) Heynh. Experiments were performed on 15-day old wild type (WT) plants, the mutant etr1-1 with impaired ethylene reception, and the ethylene-insensitive mutant ctr1-1 with constitutively activated ESP. The plants were cultivated aseptically. It was found that exogenous ethylene or an inhibitor of its action 1-methylcyclopropen (1-MCP), which blocks ethylene receptors did not affect the polyamine content in leaf rosettes of plants, which had not been subjected to UV-B stress. A day after UV-B irradiation at intermediate (9 kJ/m$^{2}$) or high doses (18 kJ/m$^{2}$), the putrescine levels increased, respectively, 6.4 and 3.0 times in WT, 4.5 and 3.2 times in etr1-1, and 5.5 and 4.7 in ctr1-1. Pretreatment with ethylene (1 μL/L) for 24 h reduced the putrescine accumulation along with the loss in spermidine and spermine pools in WT plants and, to a lesser extent, in etr1-1 mutant. Treatment with 1-MCP (50 nL/L, 3 h before and 24 h after the irradiation) enhanced plant sensitivity to UV-B, putrescine accumulation, as well as spermidine and spermine consumption in WT and, to a lesser degree, in etr1-1. The mutant ctr1-1 was insensitive to both ethylene and 1-MCP. The results show that the activation of ESP by ethylene increases plant resistance to UV-B because the irradiation stimulates accumulation of putrescine, which converts to spermidine and spermine functioning as ROS traps. |
| Starting Page | 604 |
| Ending Page | 608 |
| Page Count | 5 |
| File Format | |
| ISSN | 10214437 |
| Journal | Russian Journal of Plant Physiology |
| Volume Number | 63 |
| Issue Number | 5 |
| e-ISSN | 16083407 |
| Language | English |
| Publisher | Pleiades Publishing |
| Publisher Date | 2016-08-11 |
| Publisher Place | Moscow |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Arabidopsis thaliana etr1-1 ctr1-1 ethylene ethylene signaling pathway 1-methylcyclopropene polyamines UV-B Plant Physiology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
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