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When aeration is very poor in soil, how ...

When aeration is very poor in soil, how do respiration occur in some kind of plants?

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1. Some mangrove plants like Avicennia, Rhizophora, develop special kinds of roots (Negatively geotropic) for respiration because the soil becomes saturated with water and aeration is very poor.
2. They have a number of breathing pores or pneumatophores for exchange of gases.
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