科研成果
| 论文编号: | DOI: 10.1139/X07-164 |
| 第一作者所在部门: | 生态研究中心 |
| 论文题目: | Different adaptive responses of leaf physiological and biochemical aspects to drought in two contrasting populations of seabuckthorn |
| 作者: | 徐刚 |
| 全部作者: | Gang Xu,Baoli Duan,Chunyang Li |
| 论文出处: | |
| 刊物名称: | Canadian Journal of Forest Research |
| 年: | 2008 |
| 卷: | 38 |
| 期: | 3 |
| 页: | 584-591 |
| 联系作者: | 李春阳 |
| 收录类别: | |
| 影响因子: | 1.434 |
| 摘要 : | Two constrasting populations of seabuckthorn (Hippophae rhamnoides L.) from western China were employed to study there differences in adaptive responses to drought . The Daofu population was from a wetter upland climate region ,whereas the Dingxi populations was from a drier lowland climate region . A completely randomized design with two factors ,tweo populations and two watering regimes (100% and 25% of the soil water holding capacity) ,was used . In both populations , drought significantly decreased growth and the net photosynthesis rate (A) , and significantly increased the root/shoot ratio (RS) ,catalase (CAT) ,peroxidase (POD) , glutathione peroxidase (GPX) and ascorbate peroxidase (APX) activities , and abscisic acid (ABA) and proline contents . Compared with the Daofu population , drought induced a greater RS value , higher CAT , GPX , and APX activities ,and a higher ABA content in the Dingxi population , whereas the gas exchange traits ,for exanple the stomatal limitation value (Ls) and intercellular CO2 concentration (Ci) , were less responsive to drought in the Dingxi population .The two pupulations may have developed different stratergies to tolerate drought , such as different pathways to dissipate excess absorbed light energy , to resist oxidative stress , and to keep water status . Such factors enable the Dingxi population to tolerate drought batter than the Daofu population . |
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