五氯酚胁迫对转基因杨树光合光响应特性的影响  

Photosynthesis light response characteristics of transgenic poplars under pentachlorophenol stress

作　　者：向仰州[1] 姚斌[2] 尚鹤[2] 刘惠文[2] 刘方[3] 陈展[2] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510000 [2]中国林业科学研究院森林生态环境与保护研究所//国家林业局森林生态环境重点实验室,北京100091 [3]贵州大学资源与环境工程学院,贵州贵阳550003

出　　处：《生态环境学报》2009年第6期2146-2150,共5页Ecology and Environmental Sciences

基　　金：中央公益型科研院所基本科研业务费专项资金项目(CAFRIF200706);国家自然科学基金项目(30700637);国家林业局"948"项目(2002-16)

摘　　要：以从美国引入的转基因杨树(Populus deltoides×nigra,DN34)为材料,设置0、50、100mg·kg-1三个五氯酚胁迫质量分数开展温室盆栽试验,利用Li-6400便携式光合作用测量系统研究五氯酚污染胁迫下转基因杨树对光强的生理响应。结果表明:与对照相比,相同光强下50和100mg·kg-1质量分数的五氯酚胁迫均降低了转基因杨树叶片的净光合速率(Pn)、蒸腾速率(Tr)、胞间CO2摩尔分数(Ci)和气孔导度(Gs)。因此高质量分数五氯酚比低质量分数五氯酚对转基因杨树光合作用产生更大的抑制响应。To investigate photosynthetic properties of transgenic poplar（Populus deltoides × nigra, DN34）under pentachlorophenol（PCP） stress. The transgenic poplars were introduced from USA. With soil culture,the transgenic poplars were cultured in the greenhouse of Chinese Academy of Forestry with different PCP stress under treatments of 0,50 and 100 mg·kg-1. In two months, photosynthetic parameters of second mature leaf of every transgenic poplar were determined in the same photosynthetic active radiation（PAR） through Li-6400 portable photosynthetic system. The results showed that compared with the control, the values of net photosynthetic rate（Pn）, intercellular CO2 concentration（Ci）, transpiration rate（Tr） and stomatal conductance（Gs） decreased under the 50 and 100 mg·kg-1 PCP stress treatment. These results implied that the high PCP concentration stress has stronger inhibitory capability of the photosynthesis for the transgenic poplar than the low PCP stress.

关 键 词：五氯酚胁迫 转基因杨树 光响应 光合作用 

分 类 号：X171.5[环境科学与工程—环境科学]