小蓬竹光合作用对CO_2的响应特征 |
| |
引用本文: | 李丽霞,刘济明,廖小锋,熊雪,骆畅,柳嘉佳. 小蓬竹光合作用对CO_2的响应特征[J]. 东北林业大学学报, 2016, 0(8). DOI: 10.3969/j.issn.1000-5382.2016.08.004 |
| |
作者姓名: | 李丽霞 刘济明 廖小锋 熊雪 骆畅 柳嘉佳 |
| |
作者单位: | 1. 贵州大学,贵阳,550025;2. 贵州科学院贵州省山地资源研究所;3. 贵州大学 |
| |
基金项目: | 贵州省林业科研课题(黔林科合[2010]重大04号) |
| |
摘 要: | 为加强小蓬竹(Drepanostachyum luodianense(Yi et R.S.Wang))的保护利用及光合生理研究,以移栽和野生的2年生小蓬竹植株作为对比实验材料,利用Li-6400便携式光合作用测定系统对小蓬竹的CO2响应特性进行了研究。结果表明:小蓬竹CO2响应研究最适宜的数理模型为直角双曲线的修正模型,在控制条件为叶温28℃、叶面空气湿度75%、光合有效辐射1 700μmol·m-2·s-1时,小蓬竹胞间CO2摩尔分数随着叶室内CO2摩尔分数的升高而近乎同步直线上升,移栽小蓬竹与野生小蓬竹的胞间CO2摩尔分数和叶室内CO2摩尔分数值分别稳定在0.44、0.59;气孔导度随着胞间CO2摩尔分数的升高总体上逐步下降,移栽小蓬竹气孔导度水平略低于野生小蓬竹;蒸腾速率随着胞间CO2摩尔分数的升高及气孔导度的下降而逐步下降,最后趋于平稳,移栽小蓬竹与野生小蓬竹蒸腾速率表现出与气孔导度较为一致的差异。因此,移栽小蓬竹最大净光合速率与野生小蓬竹总体上无明显差异。
|
关 键 词: | 小蓬竹 CO2响应 光合作用与CO2的响应曲线 |
Effect of Drepano sta chyum luodianense Photosynthesis on Cha ractre istic of Response to CO2 |
| |
Abstract: | We studied the characteristic of responses on photosynthesis to CO 2 of Drepanostachyum luoid anense ( Yi et R.S. Wang ) to enhance the protection , utilization and photosynthetic physiological of D.luodianense by Li-6400 portable photo-synthesis system .The most suitable mathematical model of responses on photosynthesis to CO 2 of D.luodianesn e is the fixed rectangular hyperbola model .Under controlled conditions of the leaf temperature of 28℃, the vane air humidity of 75%, and photosynthetically active radiation of 1700μmol· m-2· s-1, intercellular CO2 concentration of D.luodianense is going up with the rising of CO 2 concentration in the hamuro .Intercellular CO 2concentration and indoor CO 2 concentration of transplanting D.luodianense is stable on 0.44, and the wild one is stable at 0.59.Stomatal conductance is going down with the rising of intercellular CO 2 concentration. The stomatal conductance of transplanting D.luodianense is slightly lower than that of wild one .Transpiration rate is going down with the rising of intercellular CO 2 concentration and the decreasing Stom-atal conductance , and going to a stable level .The transpiration rate of transplanting D.luodianense is slightly lower than that of wild one .Therefore, there is no significant difference between transplanting and wild D.luodianense. |
| |
Keywords: | Drepanostachyum luodianense Responses on photosynthesis to CO2 Photosynthesis and CO 2 response curve |
本文献已被 CNKI 万方数据 等数据库收录! |
|