AN ULTRASTRUCTURAL STUDY OF THE AZOLLA, ANABAENA AZOLLAE RELATIONSHIP

Abstract

SUMMARY Electron microscopy reveals that the multicellular hairs, in the Anabaena ‐containing leaf cavities of Azolla , produce labyrinthine wall ingrowths, and have dense cytoplasm with numerous mitochondria and abundant endoplasmic reticulum. Development of transfer cell morphology, in this location, might be an adaptation facilitating interchange of metabolites between Azolla and its algal partner. Equally prominent wall ingrowths are also found in the absence of Anabaena . It is suggested that they may be either a constitutive feature of Azolla or may be induced as a response to the presence of combined nitrogen sources in the axenic culture medium. The occurrence of plasmalemmasomes, in the developing hair‐cells of Azolla , is compared with their presence in lichens, mycorrhiza and at host‐parasite interfaces.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.