Arsenic Accumulation and Physiological Response of Three Leafy Vegetable Varieties to As Stress

Yuan Meng, Liang Zhang, Zhi-Long Yao, Yi-Bin Ren, Lin-Quan Wang and Xiao-Bin Ou
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Yuan Meng: College of Agriculture and Forestry, Longdong University, Qingyang 745000, China
Liang Zhang: College of Agriculture and Forestry, Longdong University, Qingyang 745000, China
Zhi-Long Yao: College of Agriculture and Forestry, Longdong University, Qingyang 745000, China
Yi-Bin Ren: College of Agriculture and Forestry, Longdong University, Qingyang 745000, China
Lin-Quan Wang: College of Resources and Environment, Northwest A&F University, Xiangyang 712100, China
Xiao-Bin Ou: Gansu Key Laboratory of Protection and Utilization for Biological Resources and Ecological Restoration, Qingyang 745000, China

IJERPH, 2022, vol. 19, issue 5, 1-15

Abstract: Arsenic (As) in leafy vegetables may harm humans. Herein, we assessed As accumulation in leafy vegetables and the associated physiological resistance mechanisms using soil pot and hydroponic experiments. Garland chrysanthemum ( Chrysanthemum coronarium L.), spinach ( Spinacia oleracea L.), and lettuce ( Lactuca sativa L.) were tested, and the soil As safety threshold values of the tested leafy vegetables were 91.7, 76.2, and 80.7 mg kg −1 , respectively, i.e., higher than the soil environmental quality standard of China. According to growth indicators and oxidative stress markers (malondialdehyde, the ratio of reduced glutathione to oxidized glutathione, and soluble protein), the order of As tolerance was: GC > SP > LE. The high tolerance of GC was due to the low transport factor of As from the roots to the shoots; the high activity of superoxide dismutase, glutathione peroxidase, and catalase; and the high content of phytochelatin in the roots. Results of this work shed light on the use of As-contaminated soils and plant tolerance of As stress.

Keywords: heavy metals; garland chrysanthemum; lettuce; antioxidant defense enzymes; GSH; PCs (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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