Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting Picea asperata populations
文献类型：期刊论文
| 作者 | Duan, BL ; Li, Y ; Zhang, XL ; Korpelainen, H ; Li, CY |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2009 |
| 卷号 | 29期号:12页码:1551_1561 |
| 关键词 | carbon isotope discrimination internal conductance limitation analysis photosynthesis stomatal conductance |
| ISSN号 | 0829-318X |
| 通讯作者 | Li, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China. |
| 中文摘要 | The aim of this study was to examine the response of internal conductance to CO2 (g(i)) to soil water deficit and contrasting light conditions, and their consequences on photosynthetic physiology in two Picea asperata Mast. populations originating from wet and dry climate regions of China. Four-year-old trees were subjected to two light treatments (30% and 100% of full sunlight) and two watering regimes (well watered, drought) for 2years. In both tested populations, drought significantly decreased g(i) and the net photosynthesis rate (A) and increased carbon isotope composition (C-13) values in both light treatments, in particular in the sun. Moreover, drought resulted in a significantly higher relative limitation due to stomatal conductance (L-s) in both light treatments and higher relative limitation due to internal conductance (L-i) and abscisic acid (ABA) in the sun plants. The results also showed that L-i (0.260.47) was always greater than L-s (0.120.28). On the other hand, drought significantly decreased the ratio of chloroplastic to internal CO2 concentration (C-c/C-i), photosynthetic nitrogen utilization efficiency (PNUE) and total biomass in the sun plants of the wet climate population, whereas there were no significant changes in these parameters in the dry climate population. Our results also showed that the dry climate population possessed higher C-13 values with higher ratio of internal conductance to stomatal conductance (g(i)/g(s)), suggesting that increasing the g(i)/g(s) ratio enhances water-use efficiency (WUE) in plants evolved in arid environments. Thus, we propose that the use of the g(i)/g(s) parameter to screen P. asperata plants with higher water deficit tolerance is certainly worthy of consideration. Furthermore, g(i) is an important variable, which reflects the population differences in PNUE, and it should thus be included in plant physiological investigations related to leaf economics. |
| 学科主题 | Forestry |
| 收录类别 | SCI |
| 资助信息 | Chinese Academy of Sciences [KSCX2-YW-N-064]; National Science Foundation of Chin [30525036] |
| 语种 | 英语 |
| 公开日期 | 2011-07-08 |
| 源URL | [http://210.75.237.14/handle/351003/22348]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Duan, BL,Li, Y,Zhang, XL,et al. Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting Picea asperata populations[J]. TREE PHYSIOLOGY,2009,29(12):1551_1561. |
| APA | Duan, BL,Li, Y,Zhang, XL,Korpelainen, H,&Li, CY.(2009).Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting Picea asperata populations.TREE PHYSIOLOGY,29(12),1551_1561. |
| MLA | Duan, BL,et al."Water deficit affects mesophyll limitation of leaves more strongly in sun than in shade in two contrasting Picea asperata populations".TREE PHYSIOLOGY 29.12(2009):1551_1561. |
入库方式： OAI收割
来源：成都生物研究所
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