GROWTH AND HETEROCYST PRODUCTION IN ANABAENA CYLINDRICA LEMM.
نویسندگان
چکیده
منابع مشابه
The Fine Structure of the Nuclear Material of a Blue-green Alga, Anabaena Cylindrica Lemm
The chromatinic material of the blue-green alga Anabaena cylindrica has complex configurations in the central regions of the cells. The distribution of the chromatin within the cells varies in different filaments, probably in response to variations in the disposition of other cellular components. In electron micrographs of thin sections of organisms fixed by the method of Kellenberger, Ryter, a...
متن کاملStudies on Nitrogen Fixation by Blue-green Algae I. Nitrogen Fixation by Anabaena Cylindrica Lemm
RECENT work, particularly that of De (1939), has shown that some blue-green algae are capable of utilizing the free nitrogen of the atmosphere in the synthesis of cell material. Much further work will be necessary, however, before the importance of nitrogen fixation by these organisms in nature can be estimated, our knowledge both of the distribution of the property within the group of the Myxo...
متن کاملHeterocyst differentiation and cell division in the cyanobacterium Anabaena cylindrica: effect of high light intensity.
Heterocyst differentiation in the cyanobacterium Anabaena cylindrica is initiated by the removal of fixed nitrogen from the medium. These specialized cells occur singly at regular intervals within filaments of vegetative cells. Incubation of cultures for periods of up to 12 h immediately prior to or following removal of fixed nitrogen, at a light intensity (500 mi Einsteins cm-2 s-1) approximat...
متن کاملHydrogen production by nitrogen-starved cultures of Anabaena cylindrica.
Nitrogen-starved cultures of the alga Anabaena cylindrica 629 produced hydrogen and oxygen continuously for 7 to 19 days. Hydrogen production attained a maximum level after 1 to 2 days of starvation and was followed by a slow decline. The maximum rates were 30 ml of H2 evolved per liter of culture per h or 32 mul of H2 per mg of dry weight per h. In 5 to 7 days the rate of H2 evolution by the m...
متن کاملEffect of glutamine on growth and heterocyst differentiation in the cyanobacterium Anabaena variabilis.
Mutants of the cyanobacterium Anabaena variabilis that were capable of increased uptake of glutamine, as compared with that in the parental strains, were isolated. Growth of these mutants and their parental strains was measured in media containing N2, ammonia, or glutamine as a source of nitrogen. All strains grew well with any one of these sources of fixed nitrogen. Much of the glutamine taken...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1944
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1944.tb05012.x