Effects of Polystyrene Microplastics on Growth, Physiology, Biochemistry, and Canopy Temperature Characteristics of Chinese Cabbage Pakchoi (Brassica chinensis L.)

被引：3
|
作者：
Guo B.-L. [1 ]
Feng C.-C. [1 ]
Chen Y. [1 ]
Lin D. [1 ]
Li L.-T. [2 ]
机构：
[1] College of Forestry, Henan Agricultural University, Zhengzhou
[2] College of Resources and Environment, Henan Agricultural University, Zhengzhou
来源：
Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 09期
关键词：
canopy temperature; Chinese cabbage pakchoi; growth and development; microplastics (MPs); physiological traits;
D O I：
10.13227/j.hjkx.202209260
中图分类号：
学科分类号：
摘要：
The aim of this study was to clarify the response characteristics of Chinese cabbage pakchoi (Brassica chinensis L.) under two particle size (100 nm and 1 000 nm) polystyrene microplastic (PS-MPs) stress conditions. This study can provide a theoretical basis and experimental reference for the interpretation of the physiological and ecological mechanism of microplastic pollution and the bioremediation of microplastic-contaminated soil. Hydroponic experiments were carried out to study the effects of two particle sizes (100 nm and 1 000 nm) of PS-MPs on growth, photosynthetic physiology, antioxidant enzyme activities, nutritional quality, anatomical structure, and canopy temperature in Chinese cabbage pakchoi. The results showed that PS-MPs stress significantly inhibited the growth and development of Chinese cabbage pakchoi. When PS-MPs stress was increased, the phenotypic indicators were significantly reduced. Meanwhile, PS-MPs stress significantly enhanced the oxidative stress response of Chinese cabbage pakchoi, such as the activities of catalase (CAT), peroxidase (POD), superoxide dismutase (SOD), and ascorbate peroxidase (APX) and the content of malondialdehyde (MDA) in leaves. Such a change tended to decrease the thickness of fenestrated and leaf and spongy tissues. Moreover, PS-MPs stress significantly increased the canopy population temperature of the Chinese cabbage pakchoi leaves. Microplastic stress had obvious inhibitory effects and toxic damage on the growth, development, and physical and chemical properties of Chinese cabbage pakchoi. © 2023 Science Press. All rights reserved.
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页码：5080 / 5091
页数：11
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