Summary
We characterized the behavior of plastid (pt) and mitochondrial (mt) nucleoids during malegametogenesis inPlumbago auriculata in three dimensions. The behavior of pt-nucleoids and mt-nucleoids differed throughout male gametogenesis.Pt-nucleoids were distibuted in a characteristic manner in three stages: in the early microspore, pt-nucleoids assemble around cell nucleus: in the mid-generative cell,pt-nucleoids gather at the internal side of the pollen: in the late-generative cell, pt-nucleoids aggregation turns its pole to the external side of the pollen. We also studied organelle nucleoids in the egg and the central cell by a method in which semi-thick sections of resin-embedded anthers and ovaries were observed by confocal laser scanning microscopy. The number of pt-nucleoids in the sperm cell did not differ significantly from that the behavior of DNA-containing organelles is regulated strictly during male gametogenes inP. auriculata, and that a biparental inheritance of plastids in the Plumbago embryo is more favored than was previously thought.
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Abbreviations
- DAPI:
-
4′,6-diamidino-2-phenylindole
- DiOC6 :
-
3,3′-dihexyloxacarbocyanine iodide
- Sua :
-
sperm cell unassociated with vegetative nucleus
- Svn :
-
sperm cell associated with vegetative nucleus
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Saito, C., Nagata, N., Sakai, A. et al. Behavior of plastid nucleoids during male gametogenesis inPlumbago auriculata . Protoplasma 216, 143–154 (2001). https://doi.org/10.1007/BF02673866
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DOI: https://doi.org/10.1007/BF02673866