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Evaluation · Q54

Q.List out any five morphological adaptations of halophytes.

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Step 1. In addition to normal roots, many halophytes/mangroves develop extra stilt roots, providing extended physical support in soft, unstable, waterlogged mud.

Step 2. A specialised type of negatively geotropic (upward-growing) root, called pneumatophores, projects up out of the mud and is studded with pores called pneumathodes (lenticels) that allow air to reach the otherwise waterlogged, oxygen-starved root system below — these are commonly called breathing roots (e.g. in Avicennia).

Step 3. Leaves are typically thick, entire (not lobed/divided), succulent and glossy, an adaptation that both stores some water and reflects excess light/heat.

Step 4. Some halophyte species are aphyllous (leafless) altogether, with the stem itself taking over the plant's photosynthetic function (as in the succulent halophyte Salicornia). …

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