Differences in root aeration, iron plaque formation and waterlogging tolerance in six mangroves along a continues tidal gradient.

摘要: Mangrove is a special coastal forest along tropical and subtropical intertidal shores. However, how mangroves adapt to tidal flooding the mechanisms involved in mangrove zonation are still poorly understood. In this study, pot trial with different tide treatments was conducted investigate differences root anatomy, porosity, radial oxygen loss, iron plaque formation waterlogging tolerance among six continuous gradient. The index of illustrated that Sonneratia apetala possessed highest index, followed by Aeguceras corniculatum/Kandelia, Rhizophora stylosa, Heritiera littorlis Thespesia populnea. Waterlogging tolerances were found be positively correlated their loss formation. Waterlogging-sensitive species such as landward semi-mangroves exhibited small porosity ROL, while waterlogging-tolerant seaward pioneer rhizophoraceous extensive ROL Nevertheless, grater detected permanent waterlogged plants when compared drained plants. conclusion, present study proposes structural adaptive strategy mangroves, higher appeared exhibit adaptability anaerobic foreshores.