Drought stress showed a trend to increase the H 2 O 2 concentration of all species: in E . urophylla by 60% at well K-supplied plants and partial K replacement by Na, and for E . camaldulensis (75%) at exclusive Na-supply, relative to W+ condition (Fig. 5 d–f).
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Leaf <sup>13</sup>C and <sup>15</sup>N composition shedding light on easing drought stress through partial K substitution by Na in eucalyptus species.
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