Abstract
Vegetative reproduction is an important phenomenon in the propagation of Gelidium species, having significant implications for its ecology and commercial cultivation. This work is an experimental study of one of five sequential processes included in the vegetative propagation of Gelidium sesquipedale: the reattachment of rhizoidal filaments differentiated from apical fragments.
Two different factors: light (25 µmol m−2 s−1 and long-day conditions, and 50 µmol m−2 s−1 and short-day conditions) and life history phases (female gametophytes and tetrasporophytes) were combined in a 2 × 2 factorial experiment. Reattachment of apical portions was induced in the laboratory under spray cultivation conditions and occurs mainly at the first stage of development when in contact with the substratum. Light conditions in these experiments (photoperiod + instantaneous photon flux densities) had no effect on the percentage of reattached neofilaments per fragment. Significant differences between percentages corresponding to both phases suggest, however, a probable competitive advantage of sporophytic fronds.
Similar content being viewed by others
References
Akatsuka, I., 1986. Japanese Gelidiales (Rhodophyta) especially Gelidium. Oceanogr. Mar. Biol. annu. Rev. 24: 171–263.
D'Antonio, C. M. & A. Gibor, 1985. A note on some influences of photon flux density on the morphology of germlings of Gelidium robustum (Gelidiales, Rhodophyta) in culture. Bot. mar. 28: 313–316.
Dixon, W. J., M. B. Brown, L. Engelman, J. W. Frane, M. A. Hill, R. I. Jennrich & J. D. Toporek, 1983. BMDP Statistical software. University of California Press, Berkeley, 735 pp.
Fei, X. G. & L. J. Huang, 1991. Artificial sporeling and field cultivation of Gelidium in China. Hydrobiologia 221: 119–124.
Fernández, C., 1991. Biological and economic importance of the genus Gelidium in Spain. Inf. Téc. Sci. Mar. 163: 1–20.
Gorostiaga, J. M., 1990. Aspectos demográficos del alga roja Gelidium sesquipedale (Clem.) Born. et Thur. Discusión sobre su adecuada gestión como, recurso explotable. Tesis de Doctorado, Universidad del Pais Vasco (Spain), 313 pp.
Juanes, J. A., 1983. Contribucíon al conocimiento de la biología de Gelidium latifolium (Grev). Thur. et Born. Tesis de Licenciatura, Universidad de Oviedo (Spain), 101 pp.
Juanes, J. A., 1992. El cultivo de especies de Gelidium: métodos aplicados y estado de desarrollo. In J. A.Juanes & S. González (eds), Gelidium: de los recursos a las aplicaciones. Diputación Regional de Cantabria, Santander (Spain): (in press).
Juanes, J. A. & A. Borja, 1991. Biological criteria for the exploitation of the commercially important species of Gelidium in Spain. Hydrobiologia 221: 45–54.
Juanes, J. A. & C. Fernández, 1988. Ciclo anual y producción de Gelidium latifolium (Grev.) Thur. et Born. (1876), en la región de cabo Peñas (Asturias, N. de España). Inv. Pesq. 52: 109–122.
McHugh, D. J., 1991. Worldwide distribution of commercial resources of seaweeds including Gelidium. Hydrobiologia 221: 19–29.
Salinas, J. M., 1991a. Spray system for re-attachment of Gelidium sesquipedale (Clem.) Born. et Thur. (Gelidiales:-Rhodophyta). Hydrobiologia 221: 107–117.
Salinas, J. M., 1991b. El proceso de refijación en Gelidium sesquipedale (Clem.) Born. et Thur. (Gelidiales:Rhodophyta). Bol. Inst. Esp. Oceanogr. 7: 3–58.
Santelices, B., 1988. Synopsis of biological data on the seaweed genera Gelidium and Pterocladia (Rhodophyta). FAO Fisheries Synopsis 145: 1–55.
Santelices, B., 1991. Production ecology of Gelidium. Hydrobiologia 221: 31–44.
Seoane-Camba, J. A., 1989. On the possibility on culturing Gelidium sesquipedale by vegetative propagation. In J. M. Kain (Jones), J. W. Andrews & B. J. McGregor (eds), Proceedings of the second workshop of COST 48, Subgroup 1: 59–68.
Sokal, R. R. & F. J. Rohlf, 1981. Biometry. The principles and practice of statistics in biological research. W. H. Freeman & Co., New York, 859 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Juanes, J.A., Puente, A. Differential reattachment capacity of isomorphic life history phases of Gelidium sesquipedale . Hydrobiologia 260, 139–144 (1993). https://doi.org/10.1007/BF00049012
Issue Date:
DOI: https://doi.org/10.1007/BF00049012