Drought-Induced Responses of Nitrogen Metabolism in <i>Ipomoea batatas</i>.

Additionally, drought stress reduced the NH 4 + to NO 3 − ratio in leaves and roots, except in N1 roots with an increasing trend ( Figure 7 ).

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In this study, the leaf RWC of sweet potato seedlings showed a decreasing trend after drought stress, and the difference increased with increasing PEG concentration ( Figure 1 ).

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