Results 181 to 190 of about 14,936 (225)

Gnarled Trichomes: An Understudied Character in Pteridium

American Fern Journal, 1996
-One of three characteristics used by Tryon to distinguish "southern" bracken ferns (Pteridium) of subsp. caudatum from "northern" taxa assigned to subsp. aquilinum is the farinaceous appearance of the intervein areas on the lower surface of the ultimate laminal segments.
John A. Thomson, Anthony B. Martin
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A Study of Apospory in Pteridium aquilinum

American Fern Journal, 1949
thesis on the Ferns of Quebec,7 Brother Marie-Victorin included this fern, remarking that since it occurs in Vermont almost up to the Canadian boundary, it is surely present in Quebec also. Although this was doubted by others, the fern was later discovered near Bedford, in Quebec a few miles north of the Vermont border, as reported by Mousley.8 In ...
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Dihydrocinnamic acids in Pteridium aquilinum

Food Chemistry, 2005
Abstract Dihydro-p-coumaric (phloretic) and dihydroferulic acids have been identified in Pteridium aquilinum. Whereas the latter has been located in cyanogenic and acyanogenic plants, the first has only been detected in cyanogenic forms.
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Substructure in negatively stained flagella of Pteridium spermatozoids

Journal of Ultrastructure Research, 1967
Phosphotungstate negative staining applied to disintegrated flagella from Pteridium sperm cells revealed that each subfiber in the “nine plus two” pattern was composed of about twelve cylindrically arranged protofibrils. Individual protofibrils were about 35 A across and with a center-to-center spacing of 50 A between adjacent units.
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Isolation and division of propoplasts of Pteridium aquilinum

Plant Science Letters, 1980
Abstract Methods were adapted for the isolation and culture of protoplasts from fern cells. Protoplasts isolated from mutant prothalli of Pteridium aquilinum regenerated growths identical to those from which the protoplasts were isolated.
C.R. Partanen, J.B. Power, E.C. Cocking
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Evolutionary studies of the chloroplast genome in Pteridium

Plant Science, 1991
Abstract Although bracken ferns of the genus Pteridium are abundant, world-wide in distribution and of economic importance in agriculture and forestry as well as in animal and human health, taxonomic and evolutionary studies of the genus have previously lacked an adequate objective basis.
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Phylloplane mycoflora of bracken, Pteridium aquilinum

Transactions of the British Mycological Society, 1974
The phylloplane mycoflora on the fronds of bracken, Pteridium aquilinum , was followed during two seasons and was shown to be similar to that on angiosperm leaves. The succession involved Aureobasidium pullulans, Botrytis cinerea and Clado-sporium herbarum followed by Alternaria alternata and Epicoccum purpurascens .
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Au sujet de Pteridium aquilinum

Bulletin mensuel de la Société linnéenne de Lyon, 1965
Combes F. Au sujet de Pteridium aquilinum. In: Bulletin mensuel de la Société linnéenne de Lyon, 34ᵉ année, n°8, octobre 1965. p. 340.
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A new species of Pteridiaceae-Pteridium Dachingshanense

Journal of Palaeosciences, 1983
A new fossil species, Pteridium dachingshanense, is described from the Early Cretaceous strata in Dachingshan Range of Neimonggol Autonomous Region (Inner Mongol), China. The species shows some characteristics of Pteridium, such as the continuous marginal sorus and a true scarious indusium. It differs from the living bracken fern Pteridium aquilinum in
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Flavonol glycosides from Pteridium aquilinum

Phytochemistry, 1995
Abstract Two new flavonol glycosides from aerial parts of Pteridium aquilinum were identified as quercetin 3- O - β -laminaribioside and isorhamnetin 3- o - β -laminaribioside by chemical and spectroscopic methods.
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