Effects of Heavy Metal Lead on Photosynthetic Characteristics and Fluorescence Parameters of Potentilla Sericea L.

doi:10.11733/j.issn.1007-0435.2018.02.025

Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (2): 447-452.DOI: 10.11733/j.issn.1007-0435.2018.02.025

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Effects of Heavy Metal Lead on Photosynthetic Characteristics and Fluorescence Parameters of Potentilla Sericea L.

QI Jin-yang, NIU Zhe, ZHANG Jing, DI Xiao-lin, TANG Shi, HUA Cheng-qi, JIANG Cong-ren, KONG Xin, WU Jian-hui

College of Landscape Architecture, Northeast Forestry University, Harbin, Heilongjiang Province 150040, China

Received:2017-06-21 Revised:2018-04-13 Online:2018-04-15 Published:2018-07-05

重金属铅对绢毛委陵菜光合特性及荧光参数的影响

祁金洋, 牛喆, 张静, 狄小琳, 唐诗, 华成琦, 江聪仁, 孔鑫, 吴建慧

东北林业大学园林学院, 黑龙江哈尔滨 150040

通讯作者: 吴建慧
作者简介:祁金洋(1996-)女,汉族,新疆乌鲁木齐人,Email:18846823130@163.com
基金资助:
大学生创新训练项目201710225143资助

Abstract

Abstract:

The net photosynthetic rate (Pn) and transpiration rate of Potentilla sericea Linn.(Tr), stomatal conductance (Gs), intercellular CO₂ concentration (Ci) and other indicators were determined to investigate the effects of different concentrations of Pb2⁺ on the photosynthetic characteristics and fluorescence parameters of Potentilla sericea Linn. A pot experiment was conducted in greenhouse to investigate their change patterns. Our results showed that the intercellular CO₂ concentration (Ci) increased with the prolongation of Pb²⁺stress and the increase of stress. However the net photosynthetic rate (Pn), transpiration rate (Tr), and stomatal conductance (Gs) were opposite to change of intercellular CO₂ concentration (Ci).The potential activity (Fv/Fo) and the maximum photochemical efficiency (Fv/Fm) of PSⅡ gradually decreased with increasing Pb²⁺stress concentration at 50 d. Potentilla sericea Linn. was capable of surviving at concentrations of 300 mg·kg^-1 and 600 mg·kg^-1 Pb²⁺, but the growth was slow. These results showed that it affected the photosynthetic characteristics of Potentilla sericea Linn. by affecting the non-stomatal limitation of the plant.

Key words: Potentilla ericea L., Pb²⁺, Photosynthetic characteristics, Fluorescence parameters

摘要：

为探讨不同浓度重金属Pb²⁺胁迫对绢毛委陵菜（Potentilla sericea L.>）光合特性及荧光参数的影响，本文采用盆栽的方法，通过对绢毛委陵菜净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）、胞间CO₂浓度（Ci）等多项指标的测定，并对其变化规律做了比较研究。结果表明：绢毛委陵菜胞间CO₂浓度（Ci）随Pb²⁺胁迫时间的延长及胁迫浓度的增大呈上升趋势，而净光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）变化趋势与胞间CO₂浓度（Ci）变化趋势相反；Pb²⁺胁迫50 d时PSⅡ潜在活性（Fv/Fo）、最大光化学效率（Fv/Fm）均随胁迫浓度的增大逐渐降低；绢毛委陵菜在Pb²⁺浓度为300 mg·kg^-1、600 mg·kg^-1时能够生存，但生长缓慢。研究表明随着铅浓度的提高，铅通过影响植物的非气孔限制来影响绢毛委陵菜的光合特性。

关键词: 绢毛委陵菜, 重金属铅, 光合特性, 荧光参数

CLC Number:

QI Jin-yang, NIU Zhe, ZHANG Jing, DI Xiao-lin, TANG Shi, HUA Cheng-qi, JIANG Cong-ren, KONG Xin, WU Jian-hui. Effects of Heavy Metal Lead on Photosynthetic Characteristics and Fluorescence Parameters of Potentilla Sericea L.[J]. Acta Agrestia Sinica, 2018, 26(2): 447-452.

祁金洋, 牛喆, 张静, 狄小琳, 唐诗, 华成琦, 江聪仁, 孔鑫, 吴建慧. 重金属铅对绢毛委陵菜光合特性及荧光参数的影响[J]. 草地学报, 2018, 26(2): 447-452.

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Effects of Heavy Metal Lead on Photosynthetic Characteristics and Fluorescence Parameters of Potentilla Sericea L.

重金属铅对绢毛委陵菜光合特性及荧光参数的影响

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