Photosynthetica 2018, 56(4):1422-1428 | DOI: 10.1007/s11099-018-0835-3

Bioaccumulation and photosynthetic activity response of sweet sorghum seedling (Sorghum bicolor L. Moench) to cadmium stress

Z. C. Xue1, J. H. Li1, D. S. Li1, S. Z. Li1,*, C. D. Jiang2, L. A. Liu2, S. Y. Wang2, W. J. Kang2
1 Institute New Energy Technology, Tsinghua University, Beijing, China
2 Institute of Botany, The Chinese Academy of Sciences, Beijing, China

A hydroponic experiment was conducted to investigate bioaccumulation and photosynthetic activity response to Cd in sweet sorghum seedlings. The seedlings were treated with 0, 50, and 100 μM Cd for 15 d. Our results showed that morphological characteristics of sweet sorghum were significantly affected by Cd treatments. The Cd concentrations in roots and shoots increased with increasing Cd concentrations in the nutrition solution; higher Cd accumulation was observed in the roots. Meanwhile, the photosynthetic activity decreased significantly and a shape of chlorophyll (Chl) a fluorescence transient in leaves was altered by Cd treatments. The Chl contents in the leaves decreased significantly, which was demonstrated by a change of spectral reflectance. Our data indicated that the higher Cd concentration reduced Chl contents and inhibited electron transport in the leaves, leading to the decrease of photosynthetic activity.

Additional key words: chlorophyll a fluorescence; energy plant; photosynthetic activity; soil contamination; spectral reflectance

Received: August 17, 2017; Accepted: February 7, 2018; Prepublished online: December 1, 2018; Published: November 1, 2018  Show citation

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Xue, Z.C., Li, J.H., Li, D.S., Li, S.Z., Jiang, C.D., Liu, L.A., Wang, S.Y., & Kang, W.J. (2018). Bioaccumulation and photosynthetic activity response of sweet sorghum seedling (Sorghum bicolor L. Moench) to cadmium stress. Photosynthetica, 56(4), 1422-1428. doi: 10.1007/s11099-018-0835-3
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