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Received: 2005-06-03

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Journal of Zhejiang University SCIENCE B 2005 Vol.6 No.10 P.974-980


Effect of cadmium on growth and photosynthesis of tomato seedlings

Author(s):  DONG Jing, WU Fei-bo, ZHANG Guo-ping

Affiliation(s):  Department of Agronomy, Zhejiang University, Hangzhou 310029, China

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

Key Words:  Cadmium, Growth, Photosynthesis, Tomato

DONG Jing, WU Fei-bo, ZHANG Guo-ping. Effect of cadmium on growth and photosynthesis of tomato seedlings[J]. Journal of Zhejiang University Science B, 2005, 6(10): 974-980.

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A1 - DONG Jing
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DOI - 10.1631/jzus.2005.B0974

A hydroponic experiment carried out to study the effect of five Cd levels on growth and photosynthesis of two tomato cultivars showed that the addition of 0.1 μmol/L Cd induced a slight increase in plant height of Hezuo 903 and the SPAD (the Soil–Plant Analyses Development) value of the 2 cultivars. However, at higher Cd levels, i.e., 1 and 10 μmol/L, root length and volume, plant height, and SPAD value were all significantly reduced. On an average of the 2 cultivars, exposure to 1 and 10 μmol/L Cd for 33 d reduced plant height by 18.9% and 46.4% and SPAD value by 11.2% and 31.6%, compared with control, respectively. Similarly, root length was reduced by 41.1% and 25.8% and root volume by 45.2% and 63.7%, respectively. The addition of Cd in the growth medium also had significant deleterious effect on net photosynthetic rate (Pn) and intracellular CO2 concentration (Ci), with Pn being reduced by 27.2% and 62.1% at 1 μmol/L and 10 μmol/L Cd treatments compared to the control, respectively, while Ci increased correspondingly by 28.4% and 39.3%.

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


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