Aerial root nodules in the tropical legume,Pentaclethra macroloba

  title={Aerial root nodules in the tropical legume,Pentaclethra macroloba},
  author={Cynthia A. Walter and A. Bien},
Symbiotic nitrogen fixation in angiosperms normally occurs in buried root nodules and is severely inhibited in flooded soils. A few plant species, however, respond to flooding by forming nodules on stems, or, in one case, submerged roots with aerenchyma. We report here the novel occurrence of aerial rhizobial nodules attached to adventitious roots of the legume,Pentaclethra macroloba, in a lowland tropical rainforest swamp in Costa Rica. Swamp sapdings (1–10 cm diameter) support an average 12 g… CONTINUE READING