|Table of Contents|

Influence of CuO Nanoparticles on Photosynthesis，Chlorophyll Fluorescence  Characteristics and Antioxidant Enzyme Activities of Willow(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年11
Page:
83-89
Research Field:
Publishing date:

Info

Title:
Influence of CuO Nanoparticles on Photosynthesis，Chlorophyll Fluorescence  Characteristics and Antioxidant Enzyme Activities of Willow
Author(s):
ZHANG Ying1; 2; CHEN Guangcai2; LIU Hong1; YANG Quanquan2; SUN Hui2
(1.College of Resources and Environmental Sciences，Fujian Agriculture and Forestry University，Fuzhou，Fujian 350002；2.Research Institute of Subtropical Forestry，Chinese Academy of Forestry，Hangzhou，Zhejiang 311400)
Keywords:
willow(Salix integar); CuO nanoparticles; photosynthesis; chlorophyll fluorescence; antioxidant enzyme
PACS:
-
DOI:
10.11937/bfyy.201711018
Abstract:
Salix integar ‘Yizhibi’ was used as material,Cu2+ and CuO microparticles (100 mg?L-1) were used as control.The effects of different concentrations of copper oxide nanoparticles on photosynthesis，chlorophyll fluorescence parameters and antioxidant enzyme system of Salix integra ‘Yizhibi’ were studied in order to provide a theoretical basis for revealing the mechanism of CuO nanoparticles on plant toxicity.The results showed that chlorophyll content of willow leaves increased significantly by 58.9% and 27.4%，respectively，under 100 mg?L-1 CuO nanoparticles and bulk particles，while Cu2+ were not significantly affected.The net photosynthetic rate(Pn),intercellular CO2 concentration (Ci) and transpiration rate (Tr) of the leaves under 100 mg?L-1 CuO bulk particles were decreased by 41.2%，34.5%，51.6%，respectively.And treated with 100 mg?L-1 CuO microparticles these were decreased by 9.9%，17.2% and 45.8%，respectively.While these were decreased by 14.3%，14.1% and 37.4%，respectively，under the Cu2+ treatment.The ФPSII under the treatments of Cu2+ did not change significantly compared with the control.The ФPSII treated with 100 mg?L-1 CuO microparticles and nanoparticles was significantly decreased by 21.1% and 23.4%.With the treatment of Cu2+，100 mg?L-1 CuO nanoparticles and microparticles，the SOD activity of willow leaves increased by 27.7%，28.3% and 11.20%，respectively.The CAT and POD activity increased significantly by 32.2% and 24.1%，respectively，under Cu2+ treatment.CAT and POD activity of 100 mg?L-1 CuO microparticles and nanoparticles showed a decreasing trend.CAT and POD activity decreased by 42.6% and 23.0% under treatment of 100 mg?L-1 CuO microparticles and 1.84% and 28.0% under treatment of 100 mg?L-1 CuO nanoparticles，respectively.The results showed that the toxicity of 100 mg?L-1 CuO nanoparticles to the photosynthetic rate and the photochemical yield of PSII of willow leaves were higher than 1.5 mg?L-1 Cu2+;the effects of CuO microparticles and CuO nanoparticles different particle size on the photosynthesis and chlorophyll fluorescence of willow leaves were complex and needed further study.

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Last Update: 2017-06-15