The Atomic Composition of Onoclea sensibilis Spores
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منابع مشابه
Red Light Stimulates an Increase in Intracellular Calcium in the Spores of Onoclea sensibilis.
Red light (R) stimulates an increase in the total concentration of intracellular calcium in the spores of Onoclea sensibilis L. as determined by atomic absorption spectroscopy. Subsequent exposure to far-red light inhibits the R-induced increase in intracellular calcium. The majority of the increase occurs 5 minutes after the onset of irradiation. The calcium antagonist, La(3+), inhibits both g...
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This study examined mutations expressed in haploid fern gametophytes derived from spores collected in the wild in order to assay for the presence of mutagenic compounds in natural environments. Gametophytes of the fern Onoclea sensibilis were cultured from spores collected in 14 natural populations around the region of Montreal, Quebec, Canada. Most of the populations grew in soils exposed to s...
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In chlorophyll-containing spores of Onoclea sensibilis, depletion of lipid reserves during germination is correlated with increases in the activity of the glyoxylate cycle enzymes isocitrate lyase and malate synthase. In Onoclea, the heterotrophic activity associated with lipid catabolism occurs at the same time that autotrophic activity is taking place. Increases in chlorophyll content and in ...
متن کاملReversal by Light of Ethylene-induced Inhibition of Spore Germination in the Sensitive Fern Onoclea sensibilis: An Action Spectrum.
Spores of the fern Onoclea sensibilis L. normally germinate to produce two cells of unequal size. The larger cell divides to produce the familiar heart-shaped prothallus. The smaller cell elongates and differentiates into the rhizoid but normally does not divide again. Onoclea spores germinate in complete darkness. Dark germination can be completely inhibited by ethylene gas (10 microliters per...
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ژورنال
عنوان ژورنال: American Fern Journal
سال: 1985
ISSN: 0002-8444
DOI: 10.2307/1546574