(n.) One of the minute grains in flowerless plants, which are analogous to seeds, as serving to reproduce the species.
(n.) An embryo sac or embryonal vesicle in the ovules of flowering plants.
(n.) A minute grain or germ; a small, round or ovoid body, formed in certain organisms, and by germination giving rise to a new organism; as, the reproductive spores of bacteria, etc.
(n.) One of the parts formed by fission in certain Protozoa. See Spore formation, belw.
Example Sentences:
(1) After absorption of labeled glucose, two pools of trehalose are found in dormant spores, one of which is extractable without breaking the spores, and the other, only after the spores are disintegrated.
(2) The dose response initially resembled that described by Scholer (1959) in which one million spores killed the majority of mice.
(3) Abnormal synaptonemal complexes were seen in all 19 crosses of N. crassa and N. intermedia that were examined, including matings between standard laboratory strains, inversions, Spore killers, and strains collected from nature.
(4) The mutant spores are pleomorphic and differ both in shape and size from the wild-type spores.
(5) The results presented here substantiate the hypothesis that in S. cerevisiae trehalose supplies energy during dormancy of the spores and not during the germination process.
(6) The fungicidal activity of six rabbit neutrophil cationic peptides (NP) against resting (dormant) spores, preincubated (swollen) spores, and hyphae of Aspergillus fumigatus and Rhizopus oryzae was examined.
(7) In the electron microscope large aggregates of beta glycogen particles were seen in the cytoplasm of sporoplasm cells in mature spores.
(8) The spore germination was synchronized by selection of the spores of the definite size and maintenance at a temperature of 0 degrees.
(9) GAD activity appeared in mutant spores after germination and increased to levels comparable to parent spores after 9 min of germination.
(10) The Ca++-form and H+-form spores of Clostridium botulinum 33A were investigated in vivo with respect to their water sorption and heat-resistance characteristics.
(11) Salt concentrations slightly lower than those providing inhibition tended to extend spore outgrowth time at low temperatures.
(12) The AL spores and the GN spores were morphologically distinct.
(13) Studies demonstrated the fact that there are present within the malignant cell and in the immediate area bacterial spores arising from one of several varieties of plant bacteria.
(14) The stages observed were diplokaryotic cells, sporogonial plasmodia, unikaryotic sporoblasts, and spores.
(15) The rod-shaped organism was motile, did not form spores, and had a gram-negative wall structure.
(16) Numerous factors influenced its activity: method of spore production, inherent spore resistance characteristics, alkalination, storage time and storage temperature.
(17) The inoculum level of infected spores in nutrient broth-yeast extract-glucose medium affected the transducing efficiency of SP-10 in lysates of these cultures.
(18) It can be dissociated from the spores using divalent metal chelators and will reassemble on the spores in the presence of calcium.
(19) Stable messenger ribonucleic acid (mRNA) was shown to be involved in both enterotoxin synthesis and synthesis of other spore coat proteins in Clostridium perfringens.
(20) Effects of alpha- or beta-D-glucose on the respiration of germinated spores (only germinated spores not including swollen spores and elongated spores) of Bacillus subtilis and B. megaterium were studied.
Sporulation
Definition:
(n.) The act or process of forming spores; spore formation. See Illust. of Bacillus, b.
Example Sentences:
(1) During the 1st h after induction of the sporulation process, the rate of protein synthesis increased to two times the initial value.
(2) We report the isolation of an RNA polymerase from sporulating cells of Bacillus thuringiensis subsp.
(3) ); and 3) those that multiply and produce large numbers of vegetative cells in the food, then release an active enterotoxin when they sporulate in the gut.
(4) One of these has high sporulation-inducing activity after illumination in vitro.
(5) The use of phase-contrast and interference-contrast optics permitted the characterization of the distinctive morphological changes occurring during sporulation of C. thermosaccharolyticum.
(6) The nature and properties of the 20S ribonucleic acid which accumulates only during the sporulation of Saccharomyces cerevisiae were examined.
(7) Tetrad dissection of sporulated diploids heterozygous for the wild-type and mutant allele resulted in a 2:2 segregation of mutant and wild-type phenotype indicating a single gene mutation.
(8) Bacillus megaterium, in which sporulation was blocked either by mutation or with netropsin, synthesizes during the stationary phase more exocellular proteinase than the sporulating culture.
(9) It is suggested that several metabolic steps may be affected in catabolite repression of sporulation.
(10) Heat resistance increased about tenfold in the range of 30-44 degrees C. Sporulation at 52 degrees C did not show any further increase in heat resistance.
(11) The mycelium of Trichoderma viride grown in the dark under submerged conditions and transferred to membrane filters sporulated only after photoinduction.
(12) Certain sporulation-specific polypeptides including the coat protein were among the most actively produced polypeptides in sporulating cells.
(13) Decoyinine, an inhibitor of GMP synthetase, was used to induce sporulation under catabolite-repressed conditions in Bacillus subtilis.
(14) Carbohydrate metabolism, under sporulation conditions, was compared in sporulating and non-sporulating diploids of Saccharomyces cerevisiae.
(15) Our results demonstrate that the partial reduction of a guanine nucleotide, probably relative to some other compound, suffices to initiate sporulation.
(16) The effect of gramicidin S added to the cultivation medium on sporulation of the gramicidin S-producing P+ variant and gramicidin S-nonproducing P- variant of Bacillus brevis var.
(17) In the non-sporulating strains, the degradation of vegetative RNA was less than 28% in the sporulation medium.
(18) Homozygotes of hrr25-1 were unable to sporulate and disruption and deletion of HRR25 interfered with mitotic and meiotic cell division.
(19) Melanin synthesis in the myxomycete Physarum polycephalum occurs during sporulation but not during spherule formation.
(20) Sporulation occurs during the late logarithmic phase of a culture, a time of slow but unbalanced growth.