Morpho-anatomical adaptations to waterlogging by germplasm accessions in a tropical forage grass
Brachiaria humidicola, a tropical forage grass, is recognized for its tolerance to temporary waterlogging. Waterlogged soils are characterized by slow movement of gases and oxygen defficiency. B. humidicola accessions showed adaptations common to wetland species, including a ventilation system (aerenchyma) from shoot to root that might facilitate O2 transport and the escape of gases that usually accumulate in roots under waterlogging. Of 12 accessions tested, one accession (CIAT 26570) showed greater aerenchyma formation. Quicker growth under waterlogging of CIAT 26570 might be associated with greater aerenchyma formation.
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