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

被引：24
|
作者：
Xue, Z. C. [1 ]
Li, J. H. [1 ]
Li, D. S. [1 ]
Li, S. Z. [1 ]
Jiang, C. D. [2 ]
Liu, L. A. [2 ]
Wang, S. Y. [2 ]
Kang, W. J. [2 ]
机构：
[1] Tsinghua Univ, Inst New Energy Technol, Beijing 100084, Peoples R China
[2] Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China
来源：
PHOTOSYNTHETICA | 2018年 / 56卷 / 04期
关键词：
chlorophyll a fluorescence; energy plant; photosynthetic activity; soil contamination; spectral reflectance; CHLOROPHYLL-A FLUORESCENCE; HEAVY-METALS; PHYTOREMEDIATION; ACCUMULATION; PLANTS; SOIL; GROWTH; METABOLISM; REMOVAL; IMPACT;
D O I：
10.1007/s11099-018-0835-3
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
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 mu M 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.
引用
收藏
页码：1422 / 1428
页数：7
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