INVESTIGADORES
SERSIC Alicia Noemi
artículos
Título:
?Prepackaged symbioses? ? propagules on roots of the epiparasitic plant Arachnitis uniflora Phil.
Autor/es:
DOMINGUEZ, L.; SÉRSIC, A.; MELVILLE, L.; PETERSON, L.
Revista:
NEW PHYTOLOGIST
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2005 vol. 169 p. 191 - 198
ISSN:
0028-646X
Resumen:
Summary
Arachnitis uniflora
, a myco-heterotrophic plant species, has fleshy tuberous roots
colonized by the arbuscular mycorrhizal fungal genus
Glomus
(Phylum Glomeromycota).
These roots produce apical and lateral propagules, both reported here for the first
time. The objective of the study was to characterize the ontogeny and structure of
the propagules, and to determine their function.
Scanning electron microscopy, laser scanning confocal microscopy and light
microscopy were used to study the ontogeny and structure of the propagules.
Propagules developed either from cortical parenchyma cells or from cells immediately
beneath the root cap; they developed a shoot meristem and cells in the basal
region which were colonized by various fungal structures including hyphae and
vesicles.
These propagules may detach from the roots, establishing new plants.
Key words: Arachnitis, hyphae, myco-heterotroph, vegetative propagules, vesicles.