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ROS scavenging enzymes and associated genes. a–c Enzymatic activities of CAT, SOD and POD at seedling and tillering stage. SOD, superoxide dismutase; CAT, catalase; POD, peroxidase. d Expression levels of genes encoding ROS-generating enzymes. e Expression levels of ROS detoxification-related genes. f Expression levels of senescence-related genes. Values are means ± SD (n = 3); ** indicates significance at P ≤ 0.01 and * indicates significance at P ≤ 0.05 by Student’s t test
