(a.) Properly, belonging to an order of alga: (Fucoideae) which are blackish in color, and produce oospores which are not fertilized until they have escaped from the conceptacle. The common rockweeds and the gulfweed (Sargassum) are fucoid in character.
(a.) In a vague sense, resembling seaweeds, or of the nature of seaweeds.
(n.) A plant, whether recent or fossil, which resembles a seaweed. See Fucoid, a.
Example Sentences:
(1) Our experience with the fucoid egg and the fungal hypha of Achlya suggest that it is the change in the intracellular ion concentration resulting from the ionic current that is critical for morphogenesis.
(2) It has been first used to reveal and study 100-s long current pulses which developing fucoid embryos drive through themselves.
(3) By far the strongest cases for a direct role of ionic currents in morphogenesis is the polarizing fucoid egg where the current is carried in part by Ca2+ and generates an intracellular concentration gradient of this ion that orients the outgrowth, and the insect follicle in which an intracellular voltage gradient is responsible for the polarized transport from nurse cell to oocyte.
(4) A calcium current appears to be important during cell polarization in fucoid zygotes (K.R.
(5) Experiments on polarizing fucoid eggs indicate that they drive a steady calcium ion current through themselves as they establish a developmental axis.
(6) In exploratory studies, we have used this device to map and measure the patterns of calcium currents that cross the surface of growing fucoid eggs and tobacco pollen, moving amebae and Dictyostelium slugs, recently fertilized ascidian eggs, as well as nurse cells of Sarcophaga follicles.
(7) Fertilization in the brown marine algae known as fucoids, is oogamous.
(8) Thus, fucoid eggs have an electrical fast block against polyspermy.
(9) We determined the distribution of F-actin in fucoid (Pelvetia, Fucus) embryos with nitrobenzoxadiazole-phallacidin, and studied the effect of cytochalasin upon the endogenous currents associated with cell polarization by using the vibrating probe.
(10) Fertilization potentials in Pelvetia fastigiata, Fucus vesiculosus, and Fucus ceranoides were studied to examine whether eggs of fucoid algae have an electrical block against polyspermy.
(11) Nonfertilizing fucoid sperm swim away from the egg surface by 1-3 min after rise of the fertilization potential.
(12) By using a sensitive 45Ca2+ overlay method designed to detect high-affinity calcium-binding proteins, at least 9-11 polypeptides were detected in extracts of fucoid gametes and zygotes.
(13) The diversity of vectorial physiology and of the forms it generates is illustrated by examples: apical growth of fungal hyphae, bud formation in yeasts, germination of fucoid zygotes, and development of cells of Nitella, Closterium, and other unicellular algae.
(14) Zygotes of fucoid algae have long been studied as a paradigm for cell polarity.
(15) The polarity of fucoid eggs is fixed either when tip growth starts or a bit earlier.
Fucus
Definition:
(n.) A paint; a dye; also, false show.
(n.) A genus of tough, leathery seaweeds, usually of a dull brownish green color; rockweed.
Example Sentences:
(1) In addition, distribution of lead and cadmium varied within the individual producer (Fucus vesiculosus) in such a way that the holdfast exhibited the highest concentration followed by the apcial tip and the branches of the first dichotomy was the lowest.
(2) The steady state mechanism of the Macrocystis and the Fucus enzymes are compared to the mechanism of the bromide-assisted disproportionation of hydrogen peroxide catalyzed by V-BrPO from Ascophyllum nodosum.
(3) Unfertilized eggs and zygotes of the marine brown alga, Fucus serratus, have been subjected to single external electric field pulses of 1 to 1760 musec duration (tau p) and 50 to 400 V field strength (Upcm-1).
(4) A polyclonal antibody raised against the LH polypeptide of Fucus serratus has been tested on LH apoproteins of other Chromophytes and Chlorophytes.
(5) Antisera raised against surface antigens of Fucus serratus sperm flagella, cause inhibition of fertilization in a species-specific manner, possibly by binding directly to the sperm fertilization receptor.
(6) In this report the additional requirement for cell wall in polarization of Fucus zygotes was investigated.
(7) In the marine brown alga, Fucus vesiculosus L., the sperm pronucleus is delimited by an envelope following penetration of the eff by the sperm.
(8) The mono and polyester glycosyl sulfates or phosphate diglycerides account for a group of polar lipids which is found in large amounts in the three fucacae that are studied: Pelvetia canaliculata (L) Deen and Thur, Fucus vesiculosus (L), Fucus serratus (L).
(9) Vanadium bromoperoxidase (V-BrPO) has been isolated and purified from the marine brown algae Fucus distichus and Macrocystis pyrifera.
(10) At present we know of two components in the proposed ASC of Fucus: an adhesive sulfated glycoprotein which is localized in the ECM, and an actin network which is localized on the adjoining cytoplasmic face.
(11) Condensation of the chromosomes during the first cell division following fertilization of the brown alga Fucus vesiculosus L. is accompanied by the almost complete disappearance of the nuclear envelope.
(12) He then explains that some people like to reuse their bucket of serrated wrack (Fucus serratus) in a bath back at home.
(13) The mechanism of the bromide-assisted disproportionation of hydrogen peroxide catalyzed by V-BrPO, which is the reaction that forms dioxygen, has been investigated for V-BrPO isolated from two new marine algal sources, Macrocystis pyrifera and Fucus distichus.
(14) Brown algae Fucus vesiculosus is recommended for monitoring polycyclic arene pollution in the area from Vormsi Island to Käsmu and green algae Cladophora or Enteromorpha in the eastern part of the Finnish Gulf.
(15) Ribonucleic acid required for rhizoid formation in Fucus zygotes is synthesized several hours before the production of proteins essential for this process.
(16) A comparison of the N-terminal amino acid rbcS sequence of A. eutrophus to those of O. luteus and brown alga Fucus species shows extensive sequence similarity (68.3% identity).
(17) Ethanol extracts of Laminaria ochroleuca, Saccorhiza polyschides and Fucus vesiculosus were administered orally to normal animals and their effects on glycemia and triglyceridemia evaluated.
(18) Extracts from the brown algae Fucus vesiculosus, F. serratus, and Halidrys siliquosa agglutinated human erythrocytes of groups A, B, O, and AB as well as erythrocytes from some animal species, ascites tumour cells from mice, and streptococci of many groups of the LANCEFIELD system.
(19) Following fertilization, there are rapid changes in the appearance of the Fucus egg.
(20) By isoelectric fucusing, the latter type can be split into the S0 and S1 types.