Results 161 to 170 of about 3,425 (203)

EFFECTS OF SELF-FERTILIZATION IN THE GIANT KELP, MACROCYSTIS PYRIFERA

Ecology, 2004
The costs of self-fertilization were evaluated for the giant kelp, Macrocystis pyrifera. Macrocystis, like other kelps, has a biphasic life history in which the dispersal stage is the 1N spore generation. Once spores settle, they grow into sedentary and micro- scopic male or female gametophytes, which produce sperm and eggs.
Libe Washburn, D C Reed
exaly   +2 more sources

Photoprotection in the brown alga Macrocystis pyrifera: Evolutionary implications

Journal of Photochemistry and Photobiology B: Biology, 2011
The dissipation of energy as heat is essential for photosynthetic organisms to protect themselves against excess light. We compared Photosystem II florescence changes (non-photochemical quenching, NPQ) in the brown alga Macrocystis pyrifera with that of Ficus sp., a higher plant to examine if the mechanism of heat dissipation (energy-dependent ...
Ernesto, Garcia-Mendoza, Hector, Ocampo-Alvarez, , Govindjee   +2 more
openaire   +2 more sources

Organization of the Photosynthetic Apparatus in Macrocystis Pyrifera

1987
The understanding of the organization and function of the photosynthetic apparatus in Macrocystis, the giant kelp, economically and ecologically the most important algal species in the nearshore marine environment of the California coast (1,2), is a first step toward clarification of the photobiology of this unique alga.
Barbara Smith, Anastasios Melis
openaire   +1 more source

Effects of sediments on the development of Macrocystis pyrifera gametophytes

Marine Biology, 1978
Rocky ocean bottoms are covered from time to time with small amounts of fine sediments. This material may interfere with the development of germling stages of Macrocystis pyrifera. Tests were performed by introducing sediments before and after spores were dispersed in culture dishes. 10 mg cm-2 of sediment, enough to occlude the surface, prevents spore
J. S. Devinny, L. A. Volse
openaire   +1 more source

Algal succession in a Macrocystis pyrifera forest

Marine Biology, 1975
Algal succession within a subtidal forest of the giant kelp Macrocystis pyrifera was studied by following colonization and community development on concrete blocks fastened to the bottom. Sets of blocks were placed in the bed at 3-month intervals. Subsequent algal development on each set was followed for over a year. All macroscopic species attached to
openaire   +1 more source

New methods for mass culture of Macrocystis pyrifera sporophytes

Aquaculture, 1979
Abstract Efforts to establish a kelp bed on the Los Angeles harbor breakwater included mass culture and dispersal of juvenile Macrocystis sporophytes. To reduce costs and to utilize transferable substrate, methods were modified from those previously developed. Expenses for laboratory space, refrigeration, and water filtration were reduced.
Joseph S. Devinny, Joan Leventhal
openaire   +1 more source

Low-molecular-weight compounds in Macrocystis pyrifera, a marine alga

Archives of Biochemistry and Biophysics, 1967
Abstract Small amounts of laminitol, succinic acid, glycerol, taurine, and a number of amino acids could be isolated from Macrocystis pyrifera, a brown alga. Laminitol, a C-methyl inositol, has been found previously in several red and brown algae and appears to be a common constituent in seaweeds.
openaire   +2 more sources

Morphological and physiological responses of Macrocystis pyrifera to nitrate enrichment

Hydrobiologia, 1984
In designing a plant maricultural scheme it is important to assess the effectiveness of artificial nutrification. Plants may respond to artificial nutrification in several ways; e.g.,. through changes in their growth rate, morphology, chemical composition, and nutrient uptake kinetics.
openaire   +1 more source

The Influence of Cytokinins on the Growth of Macrocystis pyrifera

Botanica Marina, 1991
R. de Nys, P. E. Jameson, M. T. Brown
openaire   +2 more sources

Hydrocarbons of Macrocystis pyrifera blades

Phytochemistry, 1978
Steven S. Rossi, George W. Rommel, Andrew A. Benson   +2 more
openaire   +1 more source