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| 生长温度对烟草叶片环式电子传递活性的影响 | |
Huang Wei ; Hu Hong
| |
| 2015 | |
| 发表期刊 | 植物分类与资源学报
 |
| ISSN | 2095-0845 |
| 卷号 | 37期号:03页码:283 |
| 摘要 | Cyclic electron flow (CEF) around photosystem I (PSI) is an important mechanism for photoprotection in higher plants under environmental stresses. However, the response of CEF activity to growth temperature has not been clarified. We here monitored gas exchange, chlorophyll fluorescence, and the P700 redox state over a range of light intensities in leaves of tobacco cultivar ‘ k326' grown at 24/18 ℃ and 32/26 ℃ ( day/night). No significant difference was found in the capacity of photosynthetic CO_2 assimilation between the plants grown at 24 ℃ and 32 ℃. In addition, the light response changes in the photochemical quenching of photosystem II ( Y( II) ) and non-photo-chemical quenching (NPQ) did not differ significantly between those plants. Light response curves indicated that the plants grown at 24 ℃ and 32 ℃ displayed the same level of electron flow through PSII ( ETR II) irrespective of light intensity. However, under intense light, plants grown at 24 ℃ showed significantly higher electron flow through PSI (ETR I). The ETR I/ETR II ratio was significantly higher in plants grown at 24 ℃ when exposed to intense light. Furthermore, after short-term treatment with strong light at 24 ℃, the maximum quantum yield of photosystem II (F_v/F_m ) was significantly higher in plants grown at 24 ℃ than that grown at 32 ℃. Taken together, our results suggest that enhancement of CEF activity in plants grown at 24 ℃ alleviates PSII photoinhibition, which is an important strategy in tobacco for acclimating to a relatively low growth temperature. |
| 语种 | 英语 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.kib.ac.cn/handle/151853/66427 |
| 专题 | 植物分类与资源学报 |
| 作者单位 | 中国科学院昆明植物研究所 |
| 推荐引用方式 GB/T 7714 | Huang Wei,Hu Hong. 生长温度对烟草叶片环式电子传递活性的影响[J]. 植物分类与资源学报,2015,37(03):283. |
| APA | Huang Wei,&Hu Hong.(2015).生长温度对烟草叶片环式电子传递活性的影响.植物分类与资源学报,37(03),283. |
| MLA | Huang Wei,et al."生长温度对烟草叶片环式电子传递活性的影响".植物分类与资源学报 37.03(2015):283. |
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