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Protein induction and aerenchyma formation
There are two likely mechanisms for prolonged flooding tolerance of a resistant variety of underground clover. Aschi-Smiti et al. (pp. 195-204) show that one of these may be an induction of enzymes and haemoglobin protein that improves the energy status of adventitious but not primary roots. However, oxygen transport via aerenchyma is probably a more dominant mechanism.
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