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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.2 P.126-134


Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants

Author(s):  Yan-hong Zhou, Yi-li Zhang, Xue-min Wang, Jin-xia Cui, Xiao-jian Xia, Kai Shi, Jing-quan Yu

Affiliation(s):  Department of Horticulture, Zhejiang University, Hangzhou 310029, China; more

Corresponding email(s):   yanhongzhou@zju.edu.cn

Key Words:  Nitrogen form, Photosynthetic electron allocation, Alternative electron flux, Nitrate reductase

Yan-hong Zhou, Yi-li Zhang, Xue-min Wang, Jin-xia Cui, Xiao-jian Xia, Kai Shi, Jing-quan Yu. Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants[J]. Journal of Zhejiang University Science B, 2011, 12(2): 126-134.

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author="Yan-hong Zhou, Yi-li Zhang, Xue-min Wang, Jin-xia Cui, Xiao-jian Xia, Kai Shi, Jing-quan Yu",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants
%A Yan-hong Zhou
%A Yi-li Zhang
%A Xue-min Wang
%A Jin-xia Cui
%A Xiao-jian Xia
%A Kai Shi
%A Jing-quan Yu
%J Journal of Zhejiang University SCIENCE B
%V 12
%N 2
%P 126-134
%@ 1673-1581
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1000059

T1 - Effects of nitrogen form on growth, CO2 assimilation, chlorophyll fluorescence, and photosynthetic electron allocation in cucumber and rice plants
A1 - Yan-hong Zhou
A1 - Yi-li Zhang
A1 - Xue-min Wang
A1 - Jin-xia Cui
A1 - Xiao-jian Xia
A1 - Kai Shi
A1 - Jing-quan Yu
J0 - Journal of Zhejiang University Science B
VL - 12
IS - 2
SP - 126
EP - 134
%@ 1673-1581
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1000059

Cucumber and rice plants with varying ammonium (NH4+) sensitivities were used to examine the effects of different nitrogen (N) sources on gas exchange, chlorophyll (Chl) fluorescence quenching, and photosynthetic electron allocation. Compared to nitrate (NO3)-grown plants, cucumber plants grown under NH4+-nutrition showed decreased plant growth, net photosynthetic rate, stomatal conductance, intercellular carbon dioxide (CO2) level, transpiration rate, maximum photochemical efficiency of photosystem II, and O2-independent alternative electron flux, and increased O2-dependent alternative electron flux. However, the N source had little effect on gas exchange, Chl a fluorescence parameters, and photosynthetic electron allocation in rice plants, except that NH4+-grown plants had a higher O2-independent alternative electron flux than NO3-grown plants. NO3 reduction activity was rarely detected in leaves of NH4+-grown cucumber plants, but was high in NH4+-grown rice plants. These results demonstrate that significant amounts of photosynthetic electron transport were coupled to NO3 assimilation, an effect more significant in NO3-grown plants than in NH4+-grown plants. Meanwhile, NH4+-tolerant plants exhibited a higher demand for the reduced form of nicotinamide adenine dinucleotide phosphate (NADPH) for NO3 reduction, regardless of the N form supplied, while NH4+-sensitive plants had a high water-water cycle activity when NH4+ was supplied as the sole N source.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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