Phosphine-induced physiological and biochemical responses in rice seedlings

• Published in: Chemosphere (Oxford) Vol. 100; pp. 77 - 82
• Main Authors: Mi, Lina, Niu, Xiaojun, Lu, Meiqing, Ma, Jinling, Wu, Jiandong, Zhou, Xingqiu
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.04.2014; Elsevier
• Subjects: Animal, plant and microbial ecology; Animals; Antioxidant enzymes; Applied ecology; Biological and medical sciences; Catalase - metabolism; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on plants and fungi; Fundamental and applied biological sciences. Psychology; Lipid peroxidation; Lipid Peroxidation - drug effects; Malondialdehyde - metabolism; Non agrochemicals pollutants; Oryza - drug effects; Oryza - enzymology; Oryza - metabolism; Oryza - physiology; Oxidative Stress - drug effects; Peroxidase - metabolism; Phosphine; Phosphines - pharmacology; Phytopathology. Animal pests. Plant and forest protection; Pollution effects and side effects of agrochemicals on crop plants and forest trees. Other anthropogenic factors; Pollution effects. Side effects of agrochemicals; Rice seedlings; Seedlings - drug effects; Seedlings - metabolism; Seedlings - physiology; Superoxide Dismutase - metabolism; Rice seedlings; Lipid peroxidation; Phosphine; Antioxidant enzymes; Oxidative stress; Monocotyledones; Dialdehyde; Biological marker; Lipids; Superoxide dismutase; Cereal crop; Oryza sativa; Enzymatic activity; Catalase; Gramineae; Angiospermae; Peroxidase; Peroxidation; Enzyme; Antioxidant; Plant emergence; Phosphorus Compounds; Seedlings; Phytotoxicity; Peroxidases; Spermatophyta; Oxidoreductases
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2013.12.057

•Indoor simulation experiment was conducted to explore phosphine’ effects on rice seedlings.•We examine the physiological and biochemical responses of rice seedlings to phosphine.•Antioxidant enzymes played important roles in protecting rice seedlings from ROS damage.•Rice plants could cope with the oxidative stress induced by low concentrations of phosphine. Paddy fields have been demonstrated to be one of the major resources of atmospheric phosphine and may have both positive and negative effects on rice plants. To elucidate the physiological and biochemical responses of rice plants to phosphine, rice seedlings (30d old) were selected as a model plant and were treated with different concentrations of phosphine (0, 1.4, 4.2, and 7.0mgm−3). Antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and lipid peroxidation measured via malondialdehyde (MDA) were determined as indicators of the physiological and biochemical responses of the rice seedlings to phosphine exposure. Increasing concentrations of phosphine treatment enhanced the activity of SOD, POD, and CAT. In addition, the MDA content increased with increasing concentrations of phosphine. These results suggested that antioxidant enzymes played important roles in protecting rice seedlings from ROS damage. Moreover, rice seedlings were able to cope with the oxidative stress induced by low concentrations of phosphine via an increase in antioxidant enzymatic activities. However, oxidative stress may not fully be prevented when the plants were exposed to higher concentrations of phosphine.