Phenotypic Physiological and Metabolomic Analyses Reveal Crucial Metabolic Pathways in Quinoa (<i>Chenopodium quinoa</i> Willd.) in Response to PEG-6000 Induced Drought Stress.

Antioxidant Enzyme Activity Under Drought Stress The activity of catalase (CAT) in D2 ( Figure 3 A) showed a trend of an initial increase, followed by a decrease with increasing stress levels, peaking at stress W3, which was an increase of 46.52% compared with W1.

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Compared with W1, POD activity in ZK1 showed a decreasing trend with decreases of 26.95%, 9.55%, and 23.69% under W2, W3, and W4 stress, respectively. 2.4.

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