18.2  Seagrasses: angiosperms adapted to sea floors

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Seagrasses are angiosperms adapted to life on shallow ocean beds. A suite of special ecophysiological features allows seagrasses to colonise saline and often anaerobic marine sediments; these will be discussed in an evolutionary context leading to Case study 18.3. Common features shared by seagrasses and higher land plants subjected to submergence point to some funda-mental questions about plant response to inundation.

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