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ADAPTATIONS- Salt
The environment in which mangroves live in contains high level of salt. There are a couple of ways in which different species of mangroves remove or limit the salt intake of the mangrove plant.
Red mangroves - Rhizophora
Exclude salt by having significantly impermeable roots which are highly suberised, acting as an ultra-filtration mechanism to exclude sodium salts from the rest of the plant.Salt which does accumulate in the shoot concentrates in old leaves of the plant which then after sheds. They can also store salt in cell vacuoles, which would not affect the plant.
White mangroves - Avicennia
Secretes salts directly; they have two salt glands at each leaf base, where salt leaves the mangrove. Their name also means that they are covered in salts.
Salt glands!
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