Effects of cadmium on growth, short-term photosynthetic acclimation and metal accumulation in radish plants (Raphanus sativus L.)

IF 0.5 Q4 ENGINEERING, ENVIRONMENTAL
Austin H. Nguyen, C. Hoying, Theresa M. Urbina, P. Drennan
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引用次数: 2

Abstract

Plants displaying heavy metal hyper-accumulation and high biomass could be used in phytoextraction. The present study utilises photosynthetic acclimation rates and morphological measurements to gauge cadmium toxicity in radish plants raised on nutrient solutions containing 0, 5, 10 and 20 µM CdCl2. Growth rates displayed a dose-dependent decline with cadmium exposure. Photosynthetic acclimation was significantly reduced compared to controls in all cadmium treatments. Inductively coupled plasma mass spectrometry was used to determine cadmium accumulation. In both the roots and shoots of the plant, cadmium levels were significantly higher than the controls in 10 and 20 µM treatments. Significantly more cadmium was distributed into the roots compared to shoots. A moderate tolerance for and reasonable accumulation of cadmium makes the radish a candidate for phytoremediation in marginally contaminated environments. Furthermore, the sensitivity of photosynthetic acclimation rates to cadmium exposure serves as a potential bioindicator of cadmium contamination.
镉对萝卜生长、短期光合驯化及金属积累的影响
重金属超积累和高生物量的植物可用于植物提取。本研究利用光合适应速率和形态测量来测量含有0、5、10和20µM CdCl2的营养液对萝卜的镉毒性。随着镉暴露,生长速率呈剂量依赖性下降。与对照相比,所有镉处理的光合驯化均显著降低。采用电感耦合等离子体质谱法测定镉的累积量。在10µM和20µM处理下,根和芽的镉含量均显著高于对照。根中的镉含量明显高于茎。萝卜对镉的适度耐受性和合理的积累使其成为轻度污染环境中植物修复的候选植物。此外,光合适应速率对镉暴露的敏感性可以作为镉污染的潜在生物指标。
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来源期刊
CiteScore
1.00
自引率
0.00%
发文量
66
期刊介绍: IJETM is a refereed and authoritative source of information in the field of environmental technology and management. Together with its sister publications IJEP and IJGEnvI, it provides a comprehensive coverage of environmental issues. It deals with the shorter-term, covering both engineering/technical and management solutions.
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