(n.) An aquatic plant (Ceratophyllum), with finely divided leaves.
Example Sentences:
(1) The visible absorption, CD, and EPR spectra of hornwort plastocyanin indicated a complete similarity of blue copper center to those of terrestrial higher plants and algae.
(2) The hornwort plastocyanin resembles in amino acid composition terrestrial higher plant plastocyanins rather than alga plastocyanins but is peculiar in the content of Phe and Tyr residues.
(3) The plants – such as hornwort and water crowfoot – thrive on the phosphorus and nitrogen from the water, and stop the growth of algae and pathogens.
(4) The biological recording courses operated by Birmingham University have trained hundreds of ecologists who work for the UK's most famous organisations – the National Trust, the Wildlife Trusts, the Natural History Museum, among them – and many more obscure, but vital, charities and research bodies which focus on groups like bryophytes (mosses, liverworts, and hornworts) and conchology (molluscs).
(5) However, the ultraviolet absorption spectrum of hornwort plastocyanin exhibited a lower tyrosine (Tyr) and a higher phenylalanine (Phe) content of the protein comparing with other plastocyanins.
(6) Plastocyanin isolated from an aquatic higher plant, Ceratophyllum demersum L. (hornwort), has been characterized by electronic absorption, circular dichroism (CD), and electron paramagnetic resonance (EPR) spectroscopies.
Thallus
Definition:
(n.) A solid mass of cellular tissue, consisting of one or more layers, usually in the form of a flat stratum or expansion, but sometimes erect or pendulous, and elongated and branching, and forming the substance of the thallogens.
Example Sentences:
(1) Peripheral hyphae were separated from the remaining thallus of Rhizoctonia solani in exponential and stationary phases of growth.
(2) The plasmalemma of thallus cells of the aquatic liverwort, Riccia fluitans, is reversibly depolarized by L- and D-serine.
(3) Their variations depend on the physiological and biochemical states of the thallus and on the conditions of extraction and purification.
(4) Thallus development, zoospore size, zoospore ultrastructural complexity and organization, and flagellum length are cited as important in phylogeny of the Chytridiales (chytrids) and should be the bases for this classification.
(5) Previous results showed that cell disintegration in the fungus Podospora anserina occured through the action of two proteases, enzymes whose messengers were normally latent during the extension stage of the thallus.
(6) There are no significant differences in the durrent density over the thallus cell.
(7) Little bromoperoxidase activity was obtained when fresh thallus material was extracted in Tris buffer.
(8) Incipient zoospores are produced from a multinucleate eucarpic thallus and devlop within cleavage vacuoles containing flagella.
(9) The action spectra of light reaction I, we found under these conditions, are very similar to the thallus absorption, whilst the action spectra of light reaction II show, besides strong bands of the phycobilins, only minor bands of chlorophyll a, which account for only 10-20% of the total chlorophyll.
(10) When a particulate enzyme preparation from the thallus of A. niger was incubated with GDP-[(14)C]mannose, the main radioactive products were mannose 1-phosphate (57% of products) and mannose (18%).
(11) In the presence of 10(-5) to 10 (-8) M carbonyl cyanide m-chlorophenylhydrazone (CCCP) the membrane potential of thallus cells of the aquatic liverwort Riccia fluitans responds to changes of the external pH between 5.5 and 8.3.
(12) Many things, in Thoreau's liberated state, are worth the while to see - the feeding manners of chickadees, and the trickles of spring thaw along the railroad cut, "resembling, as you look down on them, the laciniated lobed and imbricated thalluses of some lichens".
(13) By the four-cell stage, chloroplasts of the rhizoid cells have weakly staining lamellae, while chloroplasts of the thallus cells are actively dividing with deeply staining lamellae.
(14) These observations are interpreted as evidence that the thallus of A. niger contains a mannose transferase that uses the phosphate of exo-methylene-hexahydropolyprenols as an acceptor.
(15) This study demonstrates that it is possible to select for more and more toxigenic strains or for less and less active ones starting with the same thallus.
(16) Bromoperoxidase I (which has been described before) was located inside the thallus, particularly around the conceptacles, whereas bromoperoxidase II was present at the thallus surface of the alga.
(17) Using fluorescein isothiocyanate-labeled lectins of various specificities, differences in the cell wall polysaccharide composition among the different parts of the thallus and during the cycle of S communis were demonstrated.
(18) We selected three mutant strains in which the constitutive activity of the protease messengers was expressed by an arrest of growth early in development (10 to 30 hours after spore germination) and a reaction of cell disintegration, in the thallus, suppressible with beta-phenyl pyruvic acid, a protease inhibitor.
(19) The enzyme activity is first detected in a few algae undergoing aplanosporogenesis and later in medullary hyphae that reach the dividing algae by elongating perpendicularly to the thallus surface.
(20) The thallus and life cycle of Neocallimastix R1 are compared with those of aerobic chytrids.