As one of the three high productivity ecosystems, mangroves are important ecological protection barriers in tropical and subtropical waters. The response of mangrove ecosystem to global temperature change is the front field and hot spot of international marine ecology research.
Recently, it was learned that the Professor Y.S Wang research team of the South China Sea Institute of Oceanography, Chinese Academy of Sciences, used scanning electron microscopy, fluorescence microscope and gas chromatography-mass spectrometry to analyze the deposition of lignin and cork in the root outer cortex of six mangrove plants. Content and monomer composition, and revealed the mechanism of their role in the tolerance of heavy metals. The results showed that the typical mangrove plants often had relatively high degree of lignification and cork, and had a strong tolerance to environmental pollutants such as heavy metals. The reason is that the deposition of lignin and cork in the root outer cortex will hinder the transport of heavy metals into the roots and protect mangrove plants from heavy metals to a certain extent.