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Atmospheric nitrogen dioxide (NO 2) can be dry/wet deposited into plant leaves mainly through stomata, with a small fraction of cuticle deposition. Plants in nature present a wide variation in NO 2assimilationand the resistance . The abilityofleaf NO2uptakeand efficient remobiliz ationof NO2-derivedNO 3 � /NO2 � is importantfornormalplant growth andtowithstand nitrogen deprivation. Moreover, leaf-and root-derivedNO 3 � metabolisms
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Yanbo Hu (2011) studied this question.
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